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Page 2

422B - 422E

TyPICAL DEvICE ChARACTERISTICS

PARAMETER

SyMBOL

vALuE

uNITS

Peak Operating Line Voltage

V

OP

±12

Volts

Operating Line Current

I

O

200

mA

Transient Voltage

-

10

kV/Wire

Transient Current - 8/20µs waveform

-

10

kA/Wire

Operating Temperature

T

A

-55 to 100

°C

Storage Temperature

T

STG

-55 to 100

°C

Response Time

-

< 1

ns

PART

NuMBER

MAXIMuM

CLAMPING

vOLTAGE

(8/20µs)

LINE-LINE

@ 500A

v

C

±vOLTS

MAXIMuM

CLAMPING

vOLTAGE

(8/20µs)

LINE-GND

@ 500A

v

C

±vOLTS

MAXIMuM

LINE

ThROuGhPuT

RESISTANCE

R

OhMS

MAXIMuM

LEAKAGE

CuRRENT

@ 12v

OP

I

D

µA

MAXIMuM

CAPACITANCE

@ 0v, 1Mhz

C

pF

422B/E

24.0

24.0

12

5

5000

INSTALLATION INSTRuCTIONS

There are five (5) terminals on the LINE SIDE and five (5) terminals on the EQUIPMENT SIDE of the 422E, 4 data lines and one ground. Both grounds are connected

together internally. A single low impedance is ground sufficient. Incoming data lines are cut or disconnected from the equipment to insert the 422E/B products. The

incoming lines are to be connected to the line side terminals as the equipment side lines are connected to the equipment side terminals. The location of the product

should be as close to the equipment as possible. The 422E/B series is designed with a short circuit failure mode to give maximum protection. A fuse, fusible link, or

circuit breaker is recommended for each data/signal line on the input side for those that require an open circuit failure mode.

Caution: A low DC resistance ground may not be indicative of a good lightning ground. Lightning contains a broad spectrum of frequencies up to 1 MHz. A low im-

pedance path to ground at the transient frequencies is necessary. A ground strap is recommended or a #6 AWG stranded wire. For wire lengths over 1.5 meters, there

may be some excessive line to earth potential under severe thunderstorm conditions.