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GML20 LonWorks

module

1 2007-07-10

MOUNTING AND INSTALLATION

The GML20 LonWorks

interface module enables communication between a LonWorks

network and GM20 series transmitters over a twisted pair.

1. Open the transmitter cover. Remove the jumper from the pin connector at the center

of the circuit board.

2. Pull the two output wires through the hole at the bottom of the housing. When

connecting them to the screw terminal marked 'NET' of the GML20, hold the module

in one hand and make connections with the other (see Figure 1). The polarity can be

freely selected. Note that as all NDIR transmitters consume power, an additional

power supply is always needed. Check that the nominal 24 V supply is connected

between terminals + and - on the transmitter's mother board. Analogue output signals

can be used simultaneously with the LonWorks

module.

3. Install the module on the 2- and 5-pin connectors as indicated in Figure 2.

Figure 1: Connecting the wires to the GML20 module

Figure 2: Installing the GML20 module

1 2

GML20 LonWorks® module 1

GML20 LonWorks® module 2007-07-10 2 4. When configurating the transmitter, press the blue service button (marked SER

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