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Technical DatasheetTD 00026E/24/EN/01.13

• Easy wiring with terminal blocks• Configurable sensitivity range• Intrinsically safe signal circuit EEx

ia IIC for using sensors in hazardous areas

•Alarm relay can be switched as second level relay (SPDT)

Complete product information:www.e-direct.us/ftw325

Specs at a glance:

•Product: liquids as of 5 µS/cm•Approval:

ATEX II (1) GD EEx ia•Feeding sensors:

Conductive rod or rope sensors

Conductivity point level switch for multiple point detection

NivotesterFTW325

$ 155.00

7 9FTW325Probe rod 1

d4 d2

z4 z2

CH 1

CH 2

Min

.

WHG WHG

Max

.

Min

.

Off

On

7 9 9 8 8∆s

Ex Ex

NivotesterFTW325 2

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Application / Function

Application The Nivotester FTW325 can be used for overspill protection (WHG), pump dry running protection or as a two-point control for pumps. Sensors such as the Liquipoint T FTW31/FTW32 can be connected to the FTW325. Multipoint detection for up to five measuring points is possible by using 3 Nivotester FTW325s.

ApplicationexampleFunction The intrinsically safe signal input of the limit switch Nivotester FTW325 is galvanically isolated from the mains and the output. The Nivotester supplies the conductivity probes with an alternating current via a two or three-wire line and monitors its voltage. If the product reaches the switch point of the probe, the voltage between the probe and Nivotester is reduced. The output relays at the Nivotester switch depending on the set failsafe mode. Two yellow LEDs on the front panel of the Nivotester indicate the relay switch status.

NivotesterFTW325 3

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Technical data Dimensions

InputMeasured variable Depending on the setting selected, the limit

signal is triggered at a minimum or maximum level

Measuring range Three resistance ranges can be set with DIL switches; 0.1 to 1.0 kΩ; 1.0 to 10.0 kΩ; 10.0 to 200.0 kΩ

Input signal Input galvanically isolated from power supply and output

Type of protection [EEx ia] IIC

OutputOutput signal Relay output: one floating changeover

contact for the level alarmAlarm relay Floating changeover contact for fault

reporting, can be switched as second level relay

Switching delay 0.5 s; 2.0 s; 6.0 s when relay energizedSwitching power of relay contacts

Umax 253 V;Imax 2 A;Pmax 500 VA at cos φ ≥ 0.7; Umax 40 V;Imax 2 A;Pmax 80 W

Function indicators Light emitting diodes for operation (gn), fault (rd), level alarm 1 (ye) and level alarm 2 (ye) light up when level relay is energized

Power supplySupply voltage 85 to 253 V AC, 50/60 Hz;

20 to 30 V AC / 20 to 60 V DC, max. 60 mAPower consumption AC-version maximum 4.5 VA

DC-version maximum 1.2 VA (at Umin 20 V)

Technicaldata Dimensions(ininches)

Operating conditionsAmbient temperature For individual mounting –20 to +60 °C for

series mounting without lateral spacing –4 to +122 °F (–20 to +50 °C )

Storage temperature –13 to +185 °F (–25 to +85 °C)(preferably at +68 °F/+20 °C)

Installation in protective housing

–4 to +104 °F (–20 to +40 °C)

Ingress Protection IP 20EMC Interference emission to EN 61326;

electrical equipment Class B; interference immunity to EN 61326; Annex A (industrial) and NAMUR recommendation NE 21 (EMC)

Electrical connectionConnection line two core, screening not requiredLine resistance max. 25 Ω per coreCross-section max. 1×2.5 mm² or 2×1.5 mm²

ApprovalsEx approval ATEX II (1) GD [EEx ia] IICWHG approval Overspill protection to §19 WHG (Germany)

0.89 4.41

x1x2

x1x2

3.78

4.33

Mounting on DIN rail (EN 60715 TH35)

Installation according to instruction manual

NivotesterFTW325 4

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Pricetable

Moreproductstocompleteyourmeasuringpoint…

Nivotester T FTW325 Order no. Price/pcs. in USDApproval Power Supply 1 to 5 6 to 10 11 to 35Non-hazardous area 85-253 V AC FTW325-A2A1A 176.00 164.00 155.00

20-30 V AC / 20-60 V DC FTW325-A2B1A 176.00 164.00 155.00

Accessories Order no. Price/pcs. in USDHousing Field, R4 182x180x165, 5xM20, PC 52010132 92.00Prices valid until 09.30.2013 in U.S. dollars per unit (not including shipping and applicable sales tax).See Endress+Hauser, Inc. Terms and Conditions of Sale for shipping, tax, and payment terms.

Complete product information:www.e-direct.us/ftw325

Electricalconnection

CH2 CH1 MASTER/SLAVE

L1 NL+ L-

Power supply

1 2 15 16

4 5 6 17

7 8 9 10

Level relay 2/Alarm relay

PointlevelswitchLiquipoint T FTW31

RTDthermometerOmnigrad T TST187

PaperlessrecorderEcograph T RSG30

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Contact

E-directEndress+Hauser, Inc.2350 Endress PlaceGreenwood, IN 46143

Direct order

Internet www.e-direct.usby phone 888- EH-DIRECT

(343-4732)per Fax 317-535-8498E-Mail e-direct@us.endress.com