Bacharach GDX-150 Installation Instructions

1. Overview
These instructions describe how to wire the GDX-150
transmitter to a Bacharach GDA-400 or GDA-1600
controller.
The GDX-150 is a sensor transmitter that provides a
4-20 mA output signal based on the concentration of gas
detected. The 4-20 mA interface is convenient for use
with Bacharach's GDA-400 and GDA-1600 controllers
as well as other devices.
Please review the GDA-400 manual (5700-9000) or the
GDA-1600 manual (5700-9001) for a more detailed
description of its 4-20 mA interface and for instructions
on properly configuring the controller.
2. Installation
2.1. Items Required

GDX-150 transmitter

GDA-400 or GDA-1600 controller with 4-20 mA input(s)
2.2.

Installation Procedure

1. The GDX-150 has three wires exiting the rear of the housing (one green, two white). These wires
should be connected to one channel of the controller's 4-20 mA input module (5700-0014 for
GDA-400; 5700-0006 for GDA-1600). The green wire is the ground wire and should be connected
to the common terminal.
2. The white wires provide power to the transmitter and the 4-20 mA signal to the controller.
Connect one of the wires to the power terminal and the other to the signal terminal.
NOTE: The polarity of the two white wires is irrelevant.
3. Once all connections are made refer to the controller's user manual for properly configuring the
GDX-150 to operate with the controller.
P/N: 5600-9000 Rev 2
GDX-150 Sensor Transmitter
Figure 2: Components of the GDX-150
Installation Instruction 5600-9000
Rev. 2 – February 2011
Figure 1: GDX-150 Ammonia Transmitter
1