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GML20T LonWorks

module

MOUNTING AND INSTALLATION

The GML20T LonWorks

interface module enables communication between a

LonWorks

network and a GMW21 transmitter over a twisted pair. The carbon dioxide is

measured by a GMW21 transmitter and the temperature by the GML20T module itself.

1. Open the transmitter cover and remove the jumper from the pin connector at the

center of the circuit board.

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

connecting them to the screw terminal marked 'NET' of the GML20T, 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.

Figure 1: Hold the module in hand while connecting the wires

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

that the wires are between the module and the transmitter board before pressing the

module in place.

Figure 2: Installing the GML20T module

1 2

GML20T LonWorks® module 1

GML20T LonWorks® module 2 4. Configure the transmitter using a suitable installation software (an external interfa

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Vaisala GML20T Uživatelský manuál