iTRANS 2
FIXED POINT SINGLE OR DUAL GAS MONITOR
WITH DUAL ANALOG OUTPUTS
USER MANUAL
Revision 7.0
4 System Wiring
4.1 Introduction
This chapter outlines the steps required for wiring the gas monitor. These steps include the
following:
• Wiring Preparation
• Sensor Wiring
• Alarm Relay Wiring
• Power and Output Wiring
• ModBus Interface Wiring
Each of these steps is outlined in the sections that follow.
IMPORTANT: Perform all wiring in accordance with local electrical codes and local authorities
having jurisdiction.
IMPORTANT: DC signal and AC power should not be run in the same conduit.
NOTE: All field wiring colors are arbitrary (unless provided by TELEDYNE OLDHAM
SIMTRONICS).
4.2 Wiring Preparation
1. Collect the appropriate types and lengths of wire.
• For control wire, use #18 AWG (0.9 mm²) insulated, shielded cable.
• For analog signal and power wire, use three-conductor (or four-conductor for dual
channel) #18 AWG (0.9 mm²) insulated and shielded cable.
• For digital ModBus signal and power, use a minimum of five-conductor #18 AWG (0.9
mm²) insulated and shielded cable.
2. Power down the unit.
3. Unthread the windowed top from the housing.
4. Gently pull out the electronics module and place it safely to the side of the unit.
5. Thread control, signal, and power wires into the transmitter housing.
6. Shielding from either the controller or remote sensors should be bonded to the enclosure
screw located inside the .
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