Figure 10: Detector Wire Connections - Teledyne 700 IR Series Instruction Manual

Infrared gas detector for combustible and co2 gases

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Table Of Contents

Table of Contents

Customer

Supplied Wiring (In)

Power from and 4-20mA

out to Control Device

Modbus RS-485 to

Host Control Device

J1 Terminal

b) Observing correct polarity, terminate the 3-conductor 4-20mA field wiring (+, -, mA) to the

detector assembly wiring in accordance with the detail shown in Figure 10.

NOTE: If the 4-20mA output is not being used, the Green wire from the ITM

to the Black wire at the (-) terminal on the Transient Protection Module to ensure RS-485

communication is not disrupted by a 4-20mA Fault.

c) If applicable, terminate the RS-485 serial wiring. Use the second plug (Out) as termination

point on the customer side to facilitate a continuous RS-485 serial loop.

The RS-485 (if applicable) requires 24 gauge, two conductor, shielded, twisted pair cable

between detector and host controller. General Cable Commodore part number

ZO16P0022189 is recommended.

NOTE: Install a 120 ohm resistor across A & B terminals on the last detector in the serial loop.

d) Screw the cover firmly and loosen the locking screw until it reaches the cover.

Locking screw

NP700IRIMEN

Revision E.0

INFRARED GAS DETECTOR FOR COMBUSTIBLE AND CO

Explosion

Proof

Junction Box

(+)

(-)

A(+)

B(-)

Wiring to

Sensor Assembly