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INSTRUCTION MANUAL

OPTICAL INTERFACE UNIT

(CROSS-SITE FIBRE LINK UNIT)

G1IF1

© Toshiba Energy Systems & Solutions Corporation 2017

All Rights Reserved.

( Ver. 0.7 )

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Safety Precautions

Before using this product, please read this chapter carefully.

This chapter describes the safety precautions recommended when using the optical interface unit

type G1IF1. Before installing and using the equipment, this chapter must be thoroughly read and

understood.

Explanation of symbols used

Signal words such as DANGER, WARNING, and two kinds of CAUTION, will be followed by

important safety information that must be carefully reviewed.

Indicates an imminently hazardous situation which will result in death or

serious injury if you do not follow the instructions.

Indicates a potentially hazardous situation which could result in death or

serious injury if you do not follow the instructions.

CAUTION Indicates a potentially hazardous situation which if not avoided, may result in

minor injury or moderate injury.

CAUTION Indicates a potentially hazardous situation which if not avoided, may result in

property damage.

DANGER

WARNING

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Exposed terminals

Do not touch the terminals of this equipment while the power is on, as the high voltage generated

is dangerous.

Residual voltage

Hazardous voltage can be present in the DC circuit just after switching off the DC power supply.

It takes approximately 30 seconds for the voltage to discharge.

Fibre optic

When connecting this equipment via an optical fibre, do not look directly at the optical signal.

CAUTION

Earth

The earthing terminal of the equipment must be securely earthed.

CAUTION

Operating environment

The equipment must only used within the range of ambient temperature, humidity and dust

detailed in the specification and in an environment free of abnormal vibration.

Ratings

Before applying the DC power supply to the equipment, check that they conform to the

equipment ratings.

Connection cable

Carefully handle the connection cable without applying excessive force.

Modification

Do not modify this equipment, as this may cause the equipment to malfunction.

Disposal

When disposing of this equipment, do so in a safe manner according to local regulations.

WARNING

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Contents

Safety Precautions 1

1. Introduction 4

2. Application 4

3. Description 5

3.1 General Description 5

3.2 Electrical Connections 6

3.3 Indications 10

3.4 Response during Communication Fail 10

4. Installation 11

4.1 Receipt of Relays 11

4.2 Mounting 11

4.3 Electrostatic Discharge 11

4.4 Handling Precautions 11

4.5 External Connections 12

5. Commissioning and Maintenance 13

5.1 General 13

5.2 Precautions 13

5.3 Preparation 13

5.4 Commissioning Procedure 14

5.5 Maintenance 14

Appendix A Outline of Optical Interface Unit 15

Appendix B Technical Data 19

The data given in this manual are subject to change without notice. (Ver. 0.7)

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1. Introduction

The Optical interface unit G1IF1 facilitates connection of the fibre optic protection signalling

channel of the GRL100 line differential relay to remote multiplexing equipment associated with

a switched telecommunications network. This manual should be used in conjunction with the

manual for the GRL100 relay.

Table 1 G1IF1 Models

Model Telecommunication Outer case

G1IF1-01 X.21 With outer case

G1IF1-02 CCITT-G703-1.2.1 Option(*)

G1IF1-03 CCITT-G703-1.2.2 or -1.2.3 Option(*)

G1IF1-04 X.21 Option(*)

(*): If the outer case is required, it is ordered separately as option. See Appendix C.

2. Application

The Optical interface unit G1IF1 provides a connection between a fibre optic communications

channel and a switched telecommunications network. It is applied in the protection signalling

channel of the GRL100 line differential relay, allowing two GRL100 relays to communicate over

a telecommunications channel.

The G1IF1 provides an interface for connection of the fibre optic protection signalling port of the

GRL100 relay to remote multiplexing equipment having a standard CCITT G703 or X.21 type

interface to the electrical connections of a telecommunications system. Figure 2.1 illustrates the

application of the G1IF1 unit.

Figure 2.1 Application of G1IF1 Unit

In most situations the telecommunications equipment is remote from the protection equipment in

the substation. The G1IF1 unit is normally located close to the multiplexer and may be up to 2km

away from the GRL100 relay. The fibre optic cable must be either 50/125m (for distances up to

1km) or 62.5/125m (for distances up to 2km) and should be terminated with standard ST type

connectors.

The G1IF1 is connected to the switched telecommunications network via a multiplexer. The

interface is defined according to the CCITT G703 or X.21 standard. The connections should be

made using shielded, twisted pair cable.

GRL100 Line Diff. Relay

G1IF1 Switched Telecomms Muliplexer

Fibre Optic Cable

CCITT G703 or X.21 Interface

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3. Description

3.1 General Description

Figure 3.1 illustrates the operation of the Optical interface unit. The GRL100 relay and the

telecommunications multiplexer are illustrated to facilitate the explanation.

The G1IF1 unit provides three fibre optic connectors. The transmitter / receiver pair TX/RX

connect to the GRL protection signalling channel. The clock transmitter CLK can be used to

transmit the CCITT-G703-1.2.3(1.2.2) or X.21 timing signal, although it is not required in

applications such as this, where the receive signal from the G703-1.2.3(1.2.2) or X.21 is

synchronized to the clock signal. The CLK is not used for the CCITT-G703-1.2.1 interface. An

additional connection point, labelled SPARE (not shown in Figure 3.1), can be used for fitting of

a spare fibre optic cable.

Optical to electrical and electrical to optical conversion is performed on the transmit and receive

signals from the GRL100 relay respectively. CMI type encoding is used for the optical signals.

CMI encoding always results in a 50% duty factor, making the signals easy to check during

commissioning.

Code conversion is performed for connection to the CCITT-G703 or X.21 interface. G703 or

X.21 is a synchronous interface, and provides a 64kHz timing signal, which the G1IF1 uses for

synchronisation. The connections to the G703 or X.21 interface use balanced drivers and

receivers in accordance with the G703 or RS422A/V.11 standard.

GRL100

G1IF1 Telecomms Muliplexer

50/125m

62.5/125m Fibre

CCITT G703 Cable

Code

Conversion

Sync.

E/O

E/O

Serial Comms

Interface

Sync.

64kHz

O/E

O/E

Code Conversion

+

-

Auxiliary DC Supply DC/DC

Converter

TX

TX RX

RX

CLK

E/O O/E CLK

()

(): not required for CCITT G703 1.2.1.

Figure 3.1 Operation of G1IF1 Unit

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3.2 Electrical Connections

A 12-way ring terminal, connector TB1 of G1IF1 provides connections for the auxiliary dc

supply as well as test points for the telecommunications channel. The G1IF1-01 provides the

additional X.21 connector is a 15-way DIN type.

The G1IF1 auxiliary dc supply input has a nominal 48V rating as standard for communications

equipment. However the G1IF1 can also be provided with dc 110/125V rating or dc 220/250V

rating for 110/125V or 220/250V substation battery supplies.

The connections to the G1IF1-01 are shown in Figure 3.2 (a), not including the test points. The

figure also illustrates the functions of three removable links. The X.21 interface circuit is

designed for 500V isolation against the rest of the system. However, it may not be desirable to

leave the common connection floating, particularly where high levels of interference are

expected. Therefore the X.21 common can be tied via a 10k resistance to the frame ground, by

fitting link J1. Alternatively, the fitting of links JIG and JFG connects the X.21 common directly

to the frame ground.

It is recommended that a shielded cable be used for the X.21 interface. The shield should be tied

directly to the frame ground by the fitting of link JFG.

ＤＣ／ＤＣ

I S O L A T I O N

Code

Conversion

GRL100 Relay Fibre-optic cable

O/E

E/O

TX

RX

+5V

0V

+

-

Code

Conversion

A ４

A 6

8

TX

CLK

RX

Communication equipment

(X.21 interface :D-sub 15pin)

Power on

Data from COM

Data from Relay

CLK from COM TB1-2

TB1-1

TB1-3

FG

P

N

E/O

CLK

SG R

CG

1

JFG

JIG

J1

A 2

B 9

B 11

B 13

FG

LG

FG

Figure 3.2 (a) Connection Diagram for G1IF1-01 and G1IF1-04

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Figure 3.2 (b) shows the connections for G1IF1-02 and -03.

TB1-12

Code

Conversion

GRL100 Relay Fibre-optic cable

O/E

E/O

TX

RX

Code

Conversion

TB1-8

TB1-10

TX

CLK

RX

Communication equipment

Power on

TX from COM

TX from RELAY

CLK from COM

E/O

CLK

TB1- 6

TB1- 7

TB1-9

TB1-11

+5V

0V

+

-

TB1-2

TB1-1

TB1-3

FG1

P

N

LG

FG

G703 1.2.3(1.2.2) I/F only

FG2

ＤＣ／ＤＣ

Figure 3.2 (b) Connection Diagram for G1IF1-02 and G1IF1-03

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Figure 3.3 shows the signal definitions for the G703 or X.21 connection, note that a number of

the signals specified for the standard are not required for this application. Table 3.1 specifies all

electrical connections to the G1IF1 unit.

(a) Signal Definitions for G1IF1-01 (X.21) Interface

(b) Signal Definitions for G1IF1-02 and -03 (G703) Interface

Figure 3.3 Signal Definitions

11

1

6

7

8

9

10

Shield Ground

Ta

FG

Tb

Ra

Rb

Sa

Sb

CG

Transmit

Receive

Signal

Timing

G1IF1-02, 03 Telecommunications Multiplexer

(G703 1.2.3, 1.2.2 I/F only)

13

1

2

9

3

10

4

11

5

12

6

7

15

8

14

Shield Ground

Ta

SG

Tb

Ra

Rb

Sa

Sb

CG

Common Ground

Transmit

Receive

Signal

Timing

G1IF1-01 Telecommunications

Multiplexer

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Table 3.1 Electrical Connections

(a) Electrical Connections to the G1IF1-01 and -04 (X.21)

Circuit Signal Signal Terminal Numbers

Name Type TB1 X.21

Transmit Ta V.11/RS422 6 2

Tb V.11/RS422 7 9

Timing Sa V.11/RS422 10 6

Sb V.11/RS422 11 13

Receive Ra V.11/RS422 8 4

Rb V.11/RS422 9 11

Power

Supply

P 2 -

N 3 -

Ground/

Common

FG Frame Ground 1 -

LG Internal Common - -

SG Shield Ground - 1

CG Common Ground 12 8

(b) Electrical Connections to the G1IF1-02 and -03 (G703)

Circuit Signal Signal Terminal Numbers

Name Type TB1

Transmit Ta CCITT G703 6

Tb CCITT G703 7

Timing Sa CCITT G703 10

Sb CCITT G703 11

Receive Ra CCITT G703 8

Rb CCITT G703 9

Power

Supply

P 2

N 3

Ground/

Common

FG1 Frame Ground 1

LG Internal Common -

FG2 Shield Ground 12

CG Common Ground -

DC rated voltage

48V dc

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3.3 Indications

The G1IF1 unit provides four light emitting diodes (LEDs) for indication purposes. Table 3.2

details the labels, colours and functions associated with each LED.

Table 3.2 Indication LEDs

LED Label Colour Function

Power Green Lit when auxiliary dc power is present

TX from COM Yellow Indicates data transmission from the telecommunications channel to the

GRL100 relay

TX from RELAY Yellow Indicates data transmission from the GRL100 relay to the

telecommunications channel

CLK from COM Yellow Indicates the timing signal from the G703 or X.21 interface.

3.4 Response during Communication Fail

(1) When the data transmission from telecommunication multiplexer to G1IF1 is stopped:

The LED “TX from COM” turns off and the data “0” is transmitted to the relay. At that time,

the relay at local terminal detects a communication failure.

(2) When the data transmission on fibre optic interface from the relay to G1IF1 is stopped:

The LED “TX from RELAY” turns off and the send signal (the voltage between terminals

TB1-6 and TB1-7) becomes “0V”. “0V” means undefined data in G703-1.2.1 and means “0”

data in G703-1.2.2 / 1.2.3.

(3) When the timing signal from telecommunication multiplexer to G1IF1 is stopped:

The LED “CLK from COM” turns off and the data transmission on fibre optic interface from

G1IF1 to the relay is stopped. The data transmission to telecommunication multiplexer is

continued. The relay at the remote terminal detects a communication failure intermittently

because the bit synchronising between the relay at the local terminal and telecommunication

multiplexer.

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4. Installation

4.1 Receipt of Relays

On receiving the G1IF1, carry out the acceptance inspection immediately. In particular, check for

damage during transportation, and if any is found, contact the vendor.

Always store the unit in a clean, dry environment.

4.2 Mounting

Refer to Appendix A for details of mechanical fixings.

4.3 Electrostatic Discharge

CAUTION

The printed circuit board (PCB) within the G1IF1 is not intended to be a removable module. Do

not remove the PCB from the unit case, since electronic components on the PCB are very

sensitive to electrostatic discharge. If it is absolutely essential to take the PCB out of the case, do

not touch the electronic components and terminals with your bare hands. Additionally, always

put the PCB in a conductive anti-static bag when storing it.

4.4 Handling Precautions

A person's normal movements can easily generate electrostatic potential of several thousand

volts. Discharge of these voltages into semiconductor devices when handling electronic circuits

can cause serious damage, which often may not be immediately apparent but the reliability of the

circuit will have been reduced.

The electronic circuits are completely safe from electrostatic discharge when housed in the case.

Do not expose them to risk of damage by removing the PCB unnecessarily.

The unit incorporates the highest practicable protection for its semiconductor devices. However,

if it becomes necessary to remove the PCB, precautions should be taken to preserve the high

reliability and long life for which the equipment has been designed and manufactured.

CAUTION

Before removing the PCB, ensure that you are at the same electrostatic potential as the

equipment by touching the case.

Handle only the edges of the PCB. Avoid touching the electronic components, PCB

surface or connectors.

Do not pass the PCB to another person without first ensuring you are both at the same

electrostatic potential. Shaking hands achieves equipotential.

Place the PCB on an anti-static surface, or on a conducting surface which is at the same

potential as yourself.

Do not place the PCB in a polystyrene tray.

It is strongly recommended that detailed investigations on electronic circuitry should be carried

out in a Special Handling Area such as described in the IEC 60747.

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4.5 External Connections

External connections to the G1IF1 are shown in section 3.2. There are three types of connection

to the unit.

The fibre optic connections are made with standard ST type connectors. Transmitters are of the

LED type. When handling fibre optic cables, care should be taken so as not to cause damage by

rough treatment or by exceeding the minimum bend radius of the fibre.

The CCITT G703 interface connection is made with a ring terminal block labeled TB1. The X.21

interface connection is made with a standard 15-way DIN type connector.

The power supply and safety earth connections should be made with ring-type crimp terminals to

the terminal block TB1.

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5. Commissioning and Maintenance

5.1 General

The G1IF1 should be commissioned in conjunction with the GRL100 relay with which it is

specified.

Test personnel must be familiar with general relay testing practices and safety precautions to

avoid personal injuries or equipment damage.

5.2 Precautions

CAUTION

The unit is provided with a grounding terminal.

Before starting the work, always make sure the unit is grounded.

Ensure that the auxiliary supply connections are properly fixed to their terminals.

Before turning on the power, check that the polarity and voltage of the power supply are

correct.

Turn off the auxiliary supply before checking the interior of the unit.

While the power is on, do not mount/dismount the PCB.

Failure to observe any of the precautions above may cause damage or malfunction of the unit.

Refer to section 4.4 for information on handling precautions.

5.3 Preparation

Test equipment

The following test equipment is required for the commissioning tests.

DC power supply.

Calibrated voltmeter.

Visual inspection

After unpacking the product, check for any damage to the case. If there is any damage, the

internal module might also have been affected. Contact the vendor.

Unit ratings

Check that the items described on the nameplate on the front of the unit conform to the user’s

specification. The items are: unit type and model, and auxiliary DC supply voltage rating.

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5.4 Commissioning Procedure

The G1IF1 should be commissioned in conjunction with the GRL100 relay with which it is

specified. Refer to the GRL100 manual for full details. It is necessary to commission both ends of

the protection scheme together.

Ensure that all necessary communication connections are made at each end of the protection

scheme. Apply auxiliary power to both GRL100 relays and to both G1IF1 units. Any failure in

communication will be indicated by the GRL100 relays. If communication is healthy then

proceed with commissioning of the GRL100 relays.

5.5 Maintenance

Periodic maintenance is not necessary.

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Appendix A

Outline of Optical Interface Unit

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Dimensions and Connections

ＴＯＳＨＩＢＡ

168

180

195 130

66

2- Φ5

2-5×9

RX

ＴＢ１

1

12

TX

CLK

SPARE

X.21

156

Power

TX from COM

TX from RELAY

CLK from COM

For G1IF1-01, and

G1IF1-04 only

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Outer Case Dimensions for G1IF1-01

4-Φ6

166 200 226 246

266

300

326

346

87

CROSS SITE FIBRE LINK UNIT

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Outer Case Dimensions for G1RK7-0102 and -0103 (Option)

4-Φ6

166 200 226 246

266

300

326

346

87

OPTICAL INTERFACE UNIT

For G1RK7-0103 only

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Appendix B

Technical Data

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TECHNICAL DATA

Ratings

DC power supply: 48Vdc

110Vdc/125Vdc

220Vdc/250Vdc

(Normal range: -20% to +10% of rated voltage,

superimposed AC voltage 12%, break in supply

duration 20ms)

Burden: less than 8W

Optical Interface

Operative Range: <1km with 50/125m GI fibre (3dB/km)

<2km with 62.5/125m GI fibre (3dB/km)

Wavelength: 820nm

Connector Type: ST

Fibre Type: 50/125m or 62.5/125m glass fibre

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Environmental Performance Claims for G1IF1

Test Standards Details

Atmospheric Environment

Temperature IEC60068-2-1/2 Operating range: -10C to +55C.

Storage / Transit: -25C to +70C.

Humidity IEC60068-2-3 56 days at 40C and 93% relative humidity.

Enclosure Protection IEC60529 IP50 (Dust Proof) for G1IF1 with outer case

IP40 (excluding terminal parts) for G1IF1 without outer case

Mechanical Environment

Vibration IEC60255-21-1 Response - Class 1

Endurance - Class 1

Shock and Bump IEC60255-21-2 Shock Response Class 1

Shock Withstand Class 1

Bump Class 1

Seismic IEC60255-21-3 Class 1

High Voltage Environment

Dielectric Withstand IEC60255-5 2kVrms for 1 minute between PSU terminals and earth.

500Vrms for 1 minute between X.21 interface terminals and earth.

High Voltage Impulse IEC60255-5 Three positive and three negative impulses of 5kV(peak),

1.2/50s, 0.5J between all terminals and between all terminals

and earth.

Electromagnetic Environment

High Frequency

Disturbance /

Damped Oscillatory

Wave

IEC60255-22-1 Class 3

IEC61000-4-12,

EN61000-4-12 Class 3

1MHz 2.5kV applied to PSU terminals in common mode.

1MHz 1.0kV applied to PSU terminals in differential mode.

0.1MHz 2.5kV applied to PSU terminals in common mode.

0.1MHz 1.0kV applied to PSU terminals in differential mode.

Electrostatic

Discharge

IEC60255-22-2 Class 4 8kV contact discharge.

15kV air discharge.

Radiated RF

Electromagnetic

Disturbance

IEC60255-22-3 Class 3

Field strength 10V/m for frequency sweeps of 80MHz to 1GHz and

1.7GHz to 2.2GHz. Additional spot tests at 80, 160, 450, 900 and

1890Mhz.

Fast Transient

Disturbance

IEC60255-22-4 Class 4 4kV, 2.5kHz, 5/50ns applied to PSU inputs.

2kV, 5kHz, 5/50ns applied to G703 or X.21 interface terminals.

Conducted RF

Electromagnetic

Disturbance

IEC60255-22-6 Class 3 10Vrms applied over frequency range 150kHz to 100Mhz.

Additional spot tests at 27 and 68MHz.

Conducted

Disturbance over freq.

Range 15Hz to

150kHz

IEC61000-4-16,

EN61000-4-16, Class 3

Varying voltages applied in common mode as follows:

15Hz to 150Hz: 10V 1Vrms (20dB/decade)

150Hz to 1.5kHz: 1Vrms

1.5kHz to 15kHz: 1 10Vrms (20dB/decade)

15kHz to 150kHz: 10Vrms

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Power Frequency

Disturbance

IEC60255-22-7 300V 50Hz for 10s applied to PSU terminals in common mode.

Surge Immunity IEC61000-4-5,

EN61000-4-5

1.2/50s surge applied to PSU terminals in common/differential

modes: 2kV/1kV (peak)

Conducted and

Radiated Emissions

EN55022 Class A Conducted emissions:

0.15 to 0.50MHz: <79dB (peak) or <66dB (mean)

0.50 to 30MHz: <73dB (peak) or <60dB (mean)

Radiated emissions:

30 to 230MHz: <30dB

230 to 1000MHz: <37dB

Power Frequency

Magnetic Field

IEC61000-4-8,

EN61000-4-8, Class 4

Field applied at 50Hz with strengths of:

30A/m continuously,

300A/m for 1 second.

Pulsed Magnetic Field IEC61000-4-9,

EN61000-4-9, Class 5

6.4/16s magnetic pulses (positive and negative) applied with

magnitude 1000A/m.

Damped Oscillatory

Magnetic Field

IEC61000-4-10,

EN61000-4-10, Class 5

Oscillation frequencies of 0.1MHz and 1MHz applied with

magnitude 100A/m.

European Commission Directives

89/336/EEC

Compliance with the European Commission Electromagnetic

Compatibility Directive is demonstrated according to generic EMC

standards EN50081-2 and EN50082-2.

73/23/EEC

Compliance with the European Commission Low Voltage Directive

is demonstrated according to generic safety standards EN61010-1

and EN60950.

R&TTE 1999/5/EC Complies with the European Commission Directive on Radio and

Telecommunication Equipment.

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Appendix C

Ordering

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Optical Interface Unit

Outer Case (Option)

Type:

Optical interface unit G1IF1

Model:

For X21 with outer case

For CCITT-G703-1.2.1

For CCITT-G703-1.2.2 or 1.2.3

For X21

01

02

03

04

DC auxiliary power supply:

DC 48V/54V/60V

DC 110V/125V

DC 220V/250V

01

02

03

G1IF1

Type:

Outer case for Optical interface unit G1RK7

Model:

For G1IF1-02 and G1IF1-03

For G1IF1-04

0102

0103

G1RK7

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Version-up Records

Version

No.

Date Revised Section Contents

0.0 Jul. 16, 2002 -- First issue.

0.1 Oct. 25, 2002 3.2

3.3

Modified Figure 3.2, 3.3 and Table 3.1.

Modified Table 3.2

0.2 Jan. 17, 2003 3.2 Added the descriptions of “dc 125V” and “dc 250V” and modified Table 3.1.

0.3 Sep. 22, 2004 3.4 Added the Section 3.4.

0.4 Feb. 09, 2006 1 to 4

Appendices

Modified the description and figures. (Added G1IF1-01.)

Modified Appendix A and B, and added Appendix C.

0.5 Jul. 6, 2006 1

Appendices

Modified Table 1.

Modified Appendix A, B and C.

0.6 Nov. 30, 2007 Appendices Modified Appendix A. (P17)

0.7 Oct. 2, 2017 -- Republished under spin-off company