One to 16 channel controllertoxicgasdetection.co.uk/products/regard3920/op_manual/...REGARD 3920...

REGARD 3920 One to 16 channel controller

Installation, operation and maintenance Rev 01

2 REGARD 3920 installation, operation & maintenance - rev 01

Contents FOR YOUR SAFETY ............................................................................................................ 3

Read all relevant sections of the manual............................................................................ 4 Special conditions for safe use .......................................................................................... 5

INTENDED USE.................................................................................................................... 6 Equipment marking............................................................................................................ 6

DESCRIPTION...................................................................................................................... 7 4-20mA input module......................................................................................................... 8 Relay module..................................................................................................................... 9

OPERATION........................................................................................................................12 Gas level display...............................................................................................................12 Front panel indicators and controls ...................................................................................13 Internal indicators and controls .........................................................................................14 User interface/menus........................................................................................................15

INSTALLATION...................................................................................................................17 Location............................................................................................................................17 Mounting...........................................................................................................................17 Cable entries ....................................................................................................................18 Power supply input ...........................................................................................................18 Connecting transmitters ....................................................................................................21 Remote reset ....................................................................................................................27

CONFIGURATION AND CALIBRATION .............................................................................28 Set input module number..................................................................................................28 Set relay numbers.............................................................................................................28 Set channel tag, gas name and unit and measuring range ...............................................29 Set relays functions ..........................................................................................................31 Display board....................................................................................................................32 Calibration ........................................................................................................................33

MAINTENANCE...................................................................................................................34 Fault finding ......................................................................................................................34

SPECIFICATIONS ...............................................................................................................36 System .............................................................................................................................36 4-20mA module ................................................................................................................37 Relay module....................................................................................................................38 Passwords ........................................................................................................................38 Power supply ....................................................................................................................38 Part numbers ....................................................................................................................39 Enclosure dimensions.......................................................................................................40 Mounting points ................................................................................................................41

REGARD 3920 installation, operation & maintenance - rev 01 3

FOR YOUR SAFETY Follow the instructions Follow the instructions for installation, operation and maintenance. Maintenance The equipment must be inspected and serviced regularly by trained personnel. Keep a record of inspections and servicing. Repairs of this apparatus should only be carried out by competent personnel. We recommend that either a training course or service contract is obtained from Draeger and that all repairs are carried out by them. Refer to EN 50073 and/or local regulations. Refer to the operating manual of the transmitter for information on operation and maintenance of the transmitter. Not for use in areas where explosion hazards are possible This equipment is not approved or certified for installation in potentially explosive atmospheres. Liability for proper function or damage Liability for proper function of the equipment is irrevocably transferred to the owner or operator to the extent that the equipment is serviced or repaired by personnel not employed or authorised by Draeger, or if the equipment is used in a manner not conforming to its intended use. Draeger Safety UK Limited can not be held responsible for any damage caused by non-compliance with the above recommendations. The warranty and liability provisions of the terms and conditions of sale and delivery of Draeger Safety UK Limited are likewise not modified by the recommendations given above. Draeger Safety UK Ltd


Read all relevant sections of the manual This manual contains important information for installers, operators and commissioning / maintenance / service personnel. Personnel Relevant sections

All personnel FOR YOUR SAFETY INTENDED USE DESCRIPTION SPECIFICATIONS

Installers INSTALLATION

Commissioning / maintenance / service personnel

CONFIGURATION AND CALIBRATION MAINTENANCE

Operators OPERATION


Special conditions for safe use according to EC-type examination certificate TRL 06 ATEX 21099 X 1. Only remote sensor transmitters with valid and appropriate ATEX certification for safety and measurement performance shall be connected to this control equipment. These connections may be via ATEX certified safety interface barriers. 2. Any cable used for interconnection of remote sensor transmitters should be selected to ensure that its resistance does not have any adverse affects on the operation of the mid range control unit. Requirements for flammable gas detection according to EN 61779 If Regard 3920 is used for flammable gas detection to protect against risk of explosion, at least one gas alarm relay should be set latching. (See EN 61779-1:2000 Electrical apparatus for the detection and measurement of flammable gases — General requirements and test methods, section 3.2.3.1)


INTENDED USE • For stationary, continuous monitoring of flammable or toxic gases and vapours, oxygen

deficiency or enrichment • Display of measured gas value • Indication of alarms and control of countermeasures The controller is designed for use in non-hazardous areas, in atmospheres free of contaminants and pollutants known to be harmful to electronic equipment.

Equipment marking CE mark Regard 3920 meets the requirements of the following directives: • “EMC directive” 2004 / 108 / EC • “Low-voltage directive” 2006 / 95 / EC • ATEX directive 94 / 9 / EC Using a power supply not supplied or installed by Dräger may require re-assessment of the controller’s compliance with the EMC directive, Low-voltage directive and/or ATEX directive. ATEX marking The controller carries the following ATEX marking:

THIS MARKING DOES NOT MEAN THAT THE UNIT IS “EXPLOSION PROOF”. Regard 3920 cannot be used in areas subject to explosion hazards (“hazardous areas”) without suitable protection.

II (2) G


DESCRIPTION The controller comprises an enclosure, display, and up to four input and relay modules. The modules are connected by a ribbon cable. Each input module has four input channels and three fixed-function volt-free relays. Relay modules have eight volt-free relays, seven of which are configurable; the eighth relay is permanently set as a Fault alarm. With a mains power supply inside the 3920 enclosure there is space for four modules. Limitations: • Total four modules in a system. • Maximum two relay modules (even if only one input module). • Three input modules (ie, 12 channels) connected to a relay module. An AC power supply is normally fitted inside the enclosure, but the controller can be operated from an external DC supply. Input modules need a 24V supply to the terminals on each module. The display board and relay modules receive power through the ribbon cable. To configure and calibrate the controller use the Settings and Calibration menus on the front panel. You can also use the Regard 3900 configuration program and a Regard 3900 RS-232 interface to configure and calibrate the controller.


4-20mA input module The 4-20mA input module has four inputs for 2- or 3-wire 4-20mA transmitters. For three-wire transmitters, the module works only with transmitters with a 4-20mA source output. The module can supply up to 500mA to a three-wire transmitter. A fuse protects the output against short circuit. The module also has three volt-free relays: A1 gas alarm, A2 gas alarm and Fault. Relays can be set latching or non-latching. The relays are not acknowledgeable. ‘Latching’ or ‘Non-latching’ setting

Setting Meaning To reset alarm…

Latching

Requires manual action to reset alarm

Press OK or apply remote reset signal after gas alarm clears

or

Press OK before gas alarm clears – relay will reset after gas alarm clears

Non-latching Alarm automatically resets

Relay will automatically reset after gas alarm clears

The red LED next to each relay lights when that relay is energised. The Fault relay is always set ‘normally-energised’. If a module experiences a failure, the fault relay on that module will de-energise. 4-20mA module terminals

Remote reset There are remote reset terminals on each input module. Operating the remote reset will silence the internal sounder, acknowledge alarms and reset relays on input modules and relay modules. It is sufficient to connect a switch to one input module only – the reset signal is automatically transferred to all other modules.


Polytron warning signal The Polytron transmitter warning signal - 3mA for 1s every 10s - will trip the fault alarm if the trip level is set above 2.9mA. If the fault relay is non-latching the relay will change state momentarily every 10s, in time with warning signal. Because the duration of the warning signal’s 3mA level is short, it may not trip the fault alarm every time. Polytron 3/5mA 1Hz maintenance signal The 3-5mA 1Hz maintenance (calibration) signal on older Polytron transmitters will trip the fault alarm if the fault trip level is set higher than 2.9mA. Relay module The relay module has eight volt-free single-pole changeover (SPDT) relays that can be used to control alarms, ventilators, electrical equipment, etc. Two relay modules can be installed in the 3920 if there is enough room. With a mains PSU fitted in the 3920 enclosure there is normally space for four modules in total. Each relay module will work with up to 12 input channels. Relay functions Relay 1 on each relay module is permanently set to:

• Common fault (F1)

• Normally-energised

• Not acknowledgeable

The function of relay 1 cannot be changed. This relay will de-energise if the ribbon cable is disconnected from the module, or if there is a hardware fault on the relay module. The other seven relays can be set to the following functions

Function Operates1 (energises or de-energises2) when:

Common A1 A1 trips on any channel



Common fault (F1) F1 trips on any channel

Common F2 F2 trips on any channel

Common A1, A2 or A3 A1 or A2 or A3 trips on any channel

Voted A1 A1 trips on a specified number of channels in a group



Voted fault (F1) F1 trips on a specified number of channels in a group

Voted F2 F2 trips on a specified number of channels in a group


Single A1 A1 trips on one specified channel



Single fault F1 F1 trips on one specified channel

Single F2 F2 trips on one specified channel

“Alarms inhibited” Inhibit switch on the display board is in moved to position “1”

1. Common, voted and single relays only operate when alarms are not inhibited.

2. Depending on the whether the relay is set as ‘energise-on-alarm’ or ‘normally energised’.

Each relay can be set as latching or non-latching, and acknowledgeable or not acknowledgeable. ‘Latching’ or ‘Non-latching’ setting

Setting Meaning To reset relay:

Latching

Requires manual action to reset relay

Press OK or apply remote reset signal after alarm clears

or

Press OK before alarm clears – relay will reset after alarm clears

Non-latching Alarm automatically resets Relay will automatically reset after alarm clears

‘Acknowledgeable’ or ‘Not acknowledgeable’ setting

Setting Meaning Pressing OK (or applying remote reset signal):

Acknowledgeable

Relay can reset (manually or automatically) while alarm is tripped

Relay will reset

Not acknowledgeable

Cannot reset relay (manually or automatically) while alarm is tripped

Relay will not reset

The red LED next to each relay lights when that relay is energised. If a module fails the fault relay on that module will de-energise.


Relay module terminals

Relay numbers A link on the relay module sets the relay numbers

When you have two relay modules the 16 relays are numbered as follows:

Link Relay on module……… number in system

1-8

RL1 ......................................1 RL2 ......................................2 RL3 ......................................3 RL4 ......................................4 RL5 ......................................5 RL6 ......................................6 RL7 ......................................7 RL8 ......................................8

9-16

RL1 ......................................9 RL2 .................................... 10 RL3 .................................... 11 RL4 .................................... 12 RL5 .................................... 13 RL6 .................................... 14 RL7 .................................... 15 RL8 .................................... 16

Red LEDs Two red LEDs on the right-hand side of each module and on the display board flicker during normal operation.


OPERATION

Gas level display Normal display shows gas value, unit and gas name:

• Gas levels within approximately 2% of zero are displayed as zero – ie, the gas level

reading remains at zero until the level exceeds 2% of the range. If there are more than four channels, the display scrolls:

• To stop scrolling press for less than 1 s. • Press again for less than 1 s to restart scrolling. If the transmitter signal exceeds 20mA the display for that channel shows:

• The Over-range indication remains on the display even after the transmitter signal falls

below 20mA. Press OK to display the gas level again. If the transmitter signal is less than 3.7mA, but not 3.4mA Maintenance signal:

If the transmitter signal is 3.4mA ± 0.2mA:

To display the measuring range of all channels, press and hold the button for > 1s. The gas name is replaced by the measuring range upper limit value. For all ranges the lower limit is always 0. Example, range 0-3000:

15: 2 ppm H2S (3000)

15: Maintenance

15: Under-range

15: Over-range

15: 0 ppm H2S

16: 0.0 ppm Cl2

01: 20.9 %vol Oxygen

02: 14 ppm H2


02: 14 ppm H2

03: 0 %LEL CH4

04: 4 ppb H2S


Front panel indicators and controls

Display Shows gas level, gas name, gas units and range. Example: gas levels of channels 13, 14, 15 and 16:

AC power on. Indicates that the AC supply to the controller is on.

DC power on. Lit when there is DC supply to the controller.

Inhibit. Lit when Inhibit switch is in position 1, indicating that relays are held in their current state. A1, A2, F, Each of the 16 channels has Alarm 2, Alarm 1, Fault and Active LEDs. The channels are identified by the numbers 1, 2, 3 … 16 above the LEDs.


02: 14 ppm H2

03: 0 %LEL CH4

04: 1234 ppb H2S


LED When LED is… It means…

A2 Flashing Steady

A2 alarm tripped A2 alarm acknowledged but not cleared

A1 Flashing Steady

A1 alarm tripped A1 alarm acknowledged but not cleared

F Flashing Steady

Fault alarm tripped Fault alarm acknowledged but not cleared

Steady Blinking

Channel active Alarms inhibited

There is no LED or other indicator for Alarm 3. OK Acknowledges alarms and resets relays. “Enter” key for configuration.

Press and hold for > 1s to display measuring range. If more than four measuring channels are shown, press and release within 1s to stop the display scrolling. Press and release again to resume scrolling.

Enter user menu Press and release within 1s to enter the Information menu. Press and hold for > 1s to show the password entry menu and access the Calibration and Settings menus.

Internal indicators and controls Sounder (buzzer) A sounder on the display board gives a local audible notification of A1, A2, A3 or F1 alarm. The sounder does not operate for the F2 alarm. The following controls are only accessible when the enclosure door is open. Contrast control Use the contrast control to adjust the display’s contrast. This may be necessary if the controller is installed in a very cold or very warm environment which makes it difficult to read the display.


Inhibit switch Manually inhibits alarm relays.

Position Effect 0 All relays operate normally 1 All common, single and voted alarm relays, F1 and F2

relays are frozen in their current state. Relay(s) whose function is “Alarms inhibited” energise. Inhibit LED lights. Active LEDs flash and internal sounder operates briefly every 30s.

User interface/menus Configuration and calibration can be performed using the , and OK keys to control the menu on the display. To enter the Calibration menu or the Settings menu press and hold the key for more than 1s and then enter Calibration password or the Settings password. When the unit leaves the factory, the Calibration password is _ _ _ 1; Settings password is _ _ _ 2 . Example: enter Settings password:

• Settings are saved automatically.

• The Information menu does not need a password.

• If you do not enter a password, or you enter an invalid password, only the Information menu will appear.

• Alarms are automatically inhibited when the display shows menus.

Enter password

_ _ _ 2


Menu structure Main menu

Language menu Sets the language of the gas level display, Information screen and Calibration menus and screens. The Settings menu is always in English. Information menu

• Contains the Test LEDs function • Displays the channel tags and information about the installed modules.

Calibration menu

• Zero and span calibration

Settings menu

• Channel active • Channel tag • Gas name • Gas unit • Range • A1, A2 and A3 alarm trip levels and rising or falling setting • F1 and F2 trip settings • Relay latching/non-latching settings • Relay module functions

The display board automatically returns to gas level display if a key has not been pressed for 10 minutes.

↑ Exit - Language

+ Information

+ Calibration

+ Settings


INSTALLATION

Location Locate the controller where the display and indicators are easily seen and controls are accessible. Avoid locations where aggressive or corrosive gases, contaminants or pollutants harmful to electronic equipment are present. The controller is not “explosion proof” and must not be installed in a hazardous area without additional Ex-protection. Use a 5mm Allen key (hexagonal tool) to open the enclosure.

Mounting The enclosure can be mounted using either external mounting brackets or by drilling through the internal mounting holes. Drilling the internal mounting holes reduces the ingress protection. To maintain the enclosure’s ingress protection rating, use the external mounting brackets provided. Remove all input and relay modules to prevent damage to them when drilling the internal mounting holes. Mounting points dimensions (not to scale):

SAFETY NOTE: Maintain electrical clearance between conductive mounting screws and hazardous-live connections.


Cable entries • Wherever possible use the cable entries at the bottom of the enclosure for field cables,

so that the cables connect to the field terminals by the shortest route, and to allow access to the modules.

• Use a hole saw to open the cable entries. Do not attempt to “knock out” the cable entries. • Remove all input and relay modules before drilling the cable entries. Cable screen earthing plate An earthing plate is available to terminate cable screens to earth. Connect the plate to a low-impedance earth using large cross-section braided cable. The gland earth plate is not required for Regard 3920 to meet EMC Directive.

Power supply input The controller can be operated from AC with a 24V DC power supply inside the enclosure, or from an external 24V DC. AC supply Operation from AC requires a 24V DC power supply inside the enclosure. • If you use a power supply not supplied by Draeger, use one that meets the EMC and

LVD requirements in the specifications at then end of this manual. If the AC supply to the controller is from an AC socket, the length of cable between the socket and the controller must not exceed 3m.

• Connect the 24V DC output of the power supply to the closest 4-20mA input module

using the long leads provided. • If fitted, connect the second 4-20 module’s DC terminals to the first module’s DC

terminals using the short leads provided. • If fitted, connect the third 4-20 module’s DC terminals to the second module’s DC

terminals. • If fitted, connect the fourth 4-20 module’s DC terminals to the third module’s DC

terminals.


The display board and relay modules do not need a DC supply connection – they receive power through the ribbon cable.

External DC supply To power the controller from external 24V DC, use a regulated, noise-free 24V DC supply. If the DC input is likely to be subject to high levels of conducted RF noise, use a filter to remove the noise.

FUSED DIN RAIL TERMINALS

0V

+24V

EXTERNAL 24V DC IN

+24V DC TO INPUT/OUTPUT MODULES

DISPLAY BOARD

+24VGND

AC ON

• Connect the incoming 24V DC to the nearest 4-20mA input module using the long leads

provided. • If fitted, connect the second 4-20 module’s DC terminals to the first module’s DC

terminals. • If fitted, connect the third 4-20 module’s DC terminals to the second module’s DC

terminals. • If fitted, connect the fourth 4-20 module’s DC terminals to the third module’s DC

terminals. The display board and relay modules do not need a DC supply connection – they receive power through the ribbon cable. Ribbon cable Connect the ribbon cable to all modules and the display board.


AC and DC supply or battery backup By fitting extra terminals inside the enclosure, the controller can be powered from an AC supply and an external standby 24V DC supply or 24V battery. Diodes and/or relays may be necessary to switch from the primary DC supply to the backup DC supply or battery. Example:

Optional: when the controller is supplied with both AC and DC, connect the output of the primary 24V supply to the AC ON input on the display board. The Power AC LED on the display will illuminate when the AC is on.

Ribbon cable • Connect the ribbon cable to all modules and the display board.


Connecting transmitters Polytron 3000 and Polytron 7000 Use cable with braided copper screen.

4-20mA INPUT MODULE

0V SIG 24V 0V SIG 24V 0V SIG 24V 0V SIG 24V

CHANNEL 4CHANNEL 3CHANNEL 2CHANNEL 1


Other two-wire 4-20mA transmitter Use screened cable if required by the transmitter.

4-20mA INPUT MODULE




Polytron IR Use cable with braided copper screen.


4-20mA INPUT MODULE



Polytron PEX3000 • Use cable with copper braid screen. • Ensure screen makes good electrical contact with conductive inner surface of the

PEX3000 housing. • Connect cable screen to earth at controller using a short connection. • Refer to PEX 3000 instructions for use.

4-20mA INPUT MODULE



Other three-wire 4-20mA transmitter Regard 3920 will work with any three-wire 4-20mA transmitter with a 4-20mA source output that requires 500mA or less supply current . If the transmitter requires more than 500mA supply current, connect the transmitter’s supply terminal directly to the power supply. Regard 3920 will not work three-wire transmitters that have a 4-20mA sink output. If necessary, use a sink-to-source converter. Use screened cable if required by the transmitter.

4-20mA INPUT MODULE



Short-circuit fault indication for three-wire transmitters If there is a risk of short circuit between the 4-20mA output and 0V at the transmitter, to ensure a fault indication at the controller, the cable resistance must not exceed the value given by the following formula:

rtransmittefaultcable I

I 250R ×=

where: Rcable is the resistance per core from controller to the transmitter (in ohms); Ifault is the fault trip level (in mA); Itransmitter is the transmitter operating current (in mA). This formula assumes that the three cores of the connecting cable each have the same resistance. Example Transmitter operating current: 100mA Fault trip level: 3.2mA

Maximum cable resistance = core per ohms 81003.2 250 =×

Two-wire 4-20mA transmitter with safety barrier The following diagram shows the general arrangement. Refer to specific instructions for safety barrier and transmitter for connections between transmitter and barrier, and for instruction for earthing of barrier, where necessary. Use screened cable if required by the transmitter.

Transmitter

4-20mA INPUT

MODULE

Signal

+24V + 24V

0V

0VSignal

Safety barrier

Hazardous area Non-hazardous area


Remote reset If remote reset of alarms is required, connect a normally-open switch to the terminals on an input module. Operate the switch momentarily to acknowledge or reset alarms. It is sufficient to connect a switch to one input module only – the reset signal is automatically transferred to all other modules.


CONFIGURATION AND CALIBRATION

Set input module number If you have more than one input module you must set the module number of each module using the hardware links on the modules. Fit a jumper on the link marked with the number. Each module must have a different module number. Set the first physical module as number 1, the next as number 2, and so on.

A module’s number determines the channels on that module:

Module Nr. Channels

1 1 – 4

2 5 – 8

3 9 – 12

4 13 – 16 If you only have one input module, set it to number 1. It is easier to configure a system if the modules are numbered without gaps, and in sequence: eg 1–2–3, rather than 1–2–4.

Set relay numbers Set the relay numbers link on each relay module.

• If you have one relay module fit the link on position ‘1-8’ • If you have two relay modules fit a link on position ‘1-8’ on the first module, and ‘9-16’

on the second module.


When you have two relay modules the relays are numbered 1 to 16:

Link Relay on module……… number in system

1-8

RL1 ......................................1 RL2 ......................................2 RL3 ......................................3 RL4 ......................................4 RL5 ......................................5 RL6 ......................................6 RL7 ......................................7 RL8 ......................................8

9-16

RL1 ......................................9 RL2 .................................... 10 RL3 .................................... 11 RL4 .................................... 12 RL5 .................................... 13 RL6 .................................... 14 RL7 .................................... 15 RL8 .................................... 16

Set channel tag, gas name and unit and measuring range Use the Settings menu to configure each input and relay module. Channel tag Optional. Max 16 characters. Gas name Choose from the list or type any text. Maximum six characters. Gas units Choose from the list or type any text. Maximum four characters. Gas range Set the gas range before you set the alarm trip levels. Choose range from the list. When you change the gas range, the A1, A2 and A3 trip levels are automatically set to values valid for the new range. Default A3 trip level is 0 – disabled. Resolution and decimal places depends on the chosen range. (See Ranges and resolution table at end of manual.)


Set relays latching or non-latching The relays on the input module are permanently set as common A1, common A2 and common Fault (F1) for the four channels on that module. You can set each relay to be latching or non-latching. Requirements for flammable gas detection according to EN 61779 If Regard 3920 is used for flammable gas detection to protect against risk of ignition, at least one gas alarm relay should be set latching. (See EN 61779-1:2000 Electrical apparatus for the detection and measurement of flammable gases. General requirements and test methods. §3.2.3.1) Set alarm trip levels

• Click in the box with the value inside, type the new value in. Minimum alarm level: 4% of range Set the alarms as rising or falling:

• Select Rising or Falling from the drop down menus. For the A3 alarm only, entering a trip level of 0 disables the A3 alarm. Unused inputs Set any unused inputs as inactive using the Settings – Module – Channel – Active screen:

Channel active

- Back to menu ○ Yes ● No


Set relays functions Set the function of the relays on each relay module (if fitted).

Standard relay functions Function Operates1 (energises or de-energises2) when:




Common fault (F1) F1 trips on any channel

Common F2 F2 trips on any channel

Common A1, A2 or A3 A1 or A2 or A3 trips on any channel




Voted fault (F1) F1 trips on a specified number of channels in a group

Voted F2 F2 trips on a specified number of channels in a group




Single fault F1 F1 trips on one specified channel

Single F2 F2 trips on one specified channel

“Alarms inhibited” Inhibit switch on the display board is in moved to position “1”

The function of relay 1 cannot be changed. Common alarm for a group of inputs You can create a common alarm for a group of N channels by configuring a relay as voted 1 out of N, and specifying the channels that that the relay acts as a common alarm for. Voted alarms and inactive channels If you set channel(s) in a voted alarm inactive (ie, by clearing the Active check box) the voted alarm may not trip, if the inactive channel(s) is/are needed trip the voted alarm. If you allocate inactive channels to a voted alarm, you receive a warning. But there is no warning if you make channels inactive after allocating them to a voted alarm. Changing the controller’s arrangement after configuration If you change the Module number of an input module, or move the link on a relay module, after configuring the controller, you may find that previous-active channels are inaccessible on the voting screen. To solve this problem, clear the existing voting configuration by


temporarily setting the relay as a common relay. Then reset it as a voting relay and continue the configuration. After you complete the configuration verify that all alarms and relays operate as intended.

Display board The display board needs no configuration.


Calibration Use the Calibration menu to calibrate each channel. Also refer to the transmitter’s operating manual for calibration instructions. Zero calibration The display will indicate zero for a transmitter signal of 4mA ± 0.3mA. If necessary, calibrate the transmitter to give 4.0mA at zero gas. If the display reading is non-zero when the transmitter signal is between 3.7 and 4.3 mA attempt a zero calibration. Use the menu Calibration – Module <Module No> – Channel <Channel number> – Zero calibration Span calibration Span calibration can be performed either by applying calibration gas to the transmitter/sensor, or by controlling the output of the transmitter directly (eg by means of the transmitter’s front panel controls) to simulate a gas signal. If applying calibration gas to the transmitter:

• Apply calibration gas with concentration at least 40% of measuring range to the transmitter

• Allow the reading on the display to settle (usually need to wait one or two minutes) • Use the menu Calibration – Module <Module No> – Channel <Channel No> – Span

calibration • Select Gas concentration and press OK • Enter the concentration of the calibration gas, select Calibrate channel <Channel No> and

press OK • Wait for the display to show success then remove the calibration gas and exit the menu

screen to save the calibration. If controlling the transmitter output:

• Set the output of the transmitter to a value between 10mA and 20mA. • Use the menu Calibration – Module <Module No> – Channel <Channel No> – Span

calibration • Select Signal mA and press OK • Enter the transmitter’s signal in mA, select Calibrate channel <Channel No> and press

OK • Wait for the display to show Success then remove the calibration gas and exit the menu

screen to save the calibration.


MAINTENANCE Check the controller for operation regularly. If necessary, set the Inhibit switch on the back of the display board to position “1” to prevent alarm and fault relays changing state during testing. Return the switch to position “0” after testing. The transmitters may require periodic recalibration. Refer to the instruction manual for the transmitters for guidance. Observe EN 50073 and respective national regulations. LED and display test To test the LEDs and LCD display, press and hold the and buttons simultaneously or use the Test LEDs menu.

Fault finding Fault Cause Remedy

Controller non-operational

No DC supply to controller

Check controller has electrical supply connected. Check third party electrical supply. Check and replace power supply if necessary. Check internal power distribution wiring.

Display blank; front panel LEDs all off

No DC supply to display board Fault on display board

Check ribbon cable is connected to display board and all modules. Check internal power distribution wiring. Replace display board.

Display shows NO INPUTS

Input modules not connected to display

Check ribbon cable is connected to display board and all modules. Check input modules functioning.

Display shows 4-20 BOARD ERROR

Fault on input module

Replace input module.

Display shows RELAY BOARD ERROR

Fault on relay module

Replace relay module.

LED test fails Replace display board.

Power AC and/or Power DC LEDs not illuminated, but LCD display on.

Check controller has the required supply connected. with the appropriate connections. Replace display board.

Display shows Under-range

Loop current below 3.7 mA

Check transmitter connections. Check and measure loop current.


Check transmitter calibration.

Display shows Over-range

Short-circuit to Note: Over-range indication is latching. Press OK to clear Over-range indication. If Over-range does not clear, check transmitter

Fault LED lit for a single channel.

Check transmitter connections. Check and measure loop current. Check transmitter calibration. Replace transmitter. Replace input module.

Fault LED lit for a group of four channels.

Check transmitter connections. Check system ribbon cable. Replace input module.

Input module fitted, but no LEDs lit or data on LCD for the module.

Check system ribbon cable. Check internal power distribution wiring. Check display board. Replace input module. Replace display board.

Controller display different value to sensor display.

Transmitter calibration incorrect Input channel incorrect Input channel range not set correctly

Check transmitter calibration. Recalibrate input channel Set input range same as transmitter’s range.

Unable to transfer configuration to or from controller.

Check RS 232 interface cable connections. Check controller is on and has power connected.

Calibration failure. Check transmitter connections and calibration. Check transmitter and input module type. Check modules have correct configuration.

Water ingress. Check sealing ring is in place. Check cable entry glands. Check label is firmly affixed.

Fault alarm trips when channel made inactive

Configuration performed while alarms not inhibited.

Set Inhibit switch to position “1”, then return it to position “0”


SPECIFICATIONS System

Dimensions 415mm × 305mm × 150mm

Weight Approx. 5kg

Enclosure material ABS

Colour Grey

Ingress protection IP65

Mounting External (M6), Internal

Module fixing bolts M3 x 10

Cable entries M20 (preformed)

Cable cross-section 2.5mm2

AC input voltage Depends on power supply. Typical: 230V ± 10%; 110V ± 10%

AC current consumption • 2A PSU / 4 channels • 5A PSU / 8 channels • 10A PSU / 12 channels

Typical Maximum < 0.5A 0.5A 0.5A 1A 1A 2A

DC input voltage 18..30V DC

DC current consumption @ 24V

4-20 module: 60 mA excluding transmitters Relay module: 200mA Display: 170mA RS-232 interface: 50mA

Visual outputs Alarm, Inhibit, Power, Active and Fault LEDs Four line, 20 character LC-display with backlight

Storage temperature –25 to +70 °C

Operating temperature 0 to +55 °C

Storage humidity 0 to 100%, non condensing

Operating humidity 0 to 100%, non condensing

Warm-up time Depends on transmitter/sensor

Response time < 2 s

Accuracy 1%

Module fixings M3


4-20mA module Transmitter input Transmitter supply

2 or 3 wire 4-20mA 24V DC (nominal), max. 400mA

Relays • Format

A1, A2 & Fault Volt-free, single-pole changeover (1form C)

• Contact material Silver alloy • Nominal switching

capacity 5A 250VAC; 5A 30V DC

• Max. switching power 1,250VA, 150W • Max. switching voltage 250VAC, 100V DC • Max. switching current 5A • Min. switching voltage 10V • Min. switching current 100mA Ranges and resolution All Ranges have a zero clamp of about ±2% ie, the gas level reading remains at zero until the level exceeds 2% of the range.

Range Resolution Dec. places 0 – 1 0.01 2 0 – 2 0.01 2 0 – 3 0.01 2 0 – 4 0.01 2 0 – 5 0.01 2 0 – 6 0.01 2 0 – 7 0.01 2 0 – 8 0.01 2 0 – 9 0.01 2 0 – 10 0.1 1 0 – 11 0.1 1 0 – 12 0.1 1 0 – 15 0.1 1 0 – 20 0.1 1 0 – 25 0.1 1 0 – 30 0.1 1 0 – 50 0.1 1 0 – 75 0.1 1 0 – 100 1 0 0 – 200 1 0 0 – 250 1 0 0 – 300 1 0 0 – 500 1 0 0 – 1000 5 0 0 – 2000 5 0 0 – 3000 10 0 0 – 5000 10 0 0 – 9999 25 0


Relay module • Relay functions Relay 1 Relays 2 to 7

Common fault, normally-energised, latching, not acknowledgeable Configurable as: common A1, common A2, common A3, common fault, common F2, common A1, A2 or A3, voted A1, voted A2, voted A3, voted fault, voted F2, single A1, single A2, single A3, single fault, single F2 or “alarms inhibited”; energise-on-alarm or normally-energised; latching or non-latching; acknowledgeable or not acknowledgeable.

• Format Volt-free, single-pole changeover (1 form C)

• Contact material Silver alloy

• Nominal switching capacity

5A 250VAC; 5A 30V DC

• Max. switching power 1,250VA, 150W

• Max. switching voltage 250VAC, 100V DC

• Max. switching current 5A

• Min. switching voltage 10V

• Min. switching current 100mA

Passwords Calibration menu: _ _ _ 1 Settings menu: _ _ _ 2

Power supply If you fit a 24V DC power supply inside the Regard 3920 enclosure, use a power supply that meets the following EMC standards: • Immunity: EN 61000-6-2 • Emissions: EN 61000-6-3 or EN 61000-6-4


Part numbers Description Part number

Regard 3920 basic unit 4208850

Regard 3920 display board 4208846

4-20mA input module 4208782

Relay module 4208784

Ribbon cable 4208750

Installation, operation & maintenance manual, English 4208852

Installation, operation & maintenance manual, French 4208853

Installation, operation & maintenance manual, Chinese 4208854

Regard 3920 enclosure complete 4208752

Earthing plate 4208777

Marshalling enclosure 4208759

Regard 3800 modules, boards and accessories will not work on Regard 3920 and vice versa. Regard 3800 and Regard 3920 modules and boards are not interchangeable. Regard 3900 and Regard 3920 4-20mA input and output modules and relay modules are identical. A Regard 3900 display board will not physically fit in a Regard 3920 enclosure; a Regard 3920 display board will not physically fit in a Regard 3900 enclosure.


Enclosure dimensions

403 mm

305

mm


Mounting points


Draeger Safety UK Ltd Riverside Business Park Blyth, Northumberland NE24 4RG United Kingdom Tel +44 1670 352891 Fax +44 1670 544475 Manual part number: 4208852 Rev 01, March 2010

One to 16 channel controllertoxicgasdetection.co.uk/products/regard3920/op_manual/...REGARD 3920...

Documents

Transcript of One to 16 channel controllertoxicgasdetection.co.uk/products/regard3920/op_manual/...REGARD 3920...