AMC SIR Series Руководство по эксплуатации - Страница 14

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AMC-SIR Refrigerant Gas Sensor/Transmitter

4.3 CABLE SELECTION

The following section details the cable selection needed to ensure proper operation of the AMC-

SIR Refrigerant Gas sensor/transmitter.

The figure below is an aid for cable selection. A 3-conductor shielded cable is employed for

interconnection. All AMC Monitors typically output 24VDC with the exception of the 1A Monitor

which will vary from 19-24VDC depending on the load, so choose cable accordingly. When

using just AMC-SIR transmitters with a 1A Monitor the voltage will be over 20VDC.

There are three variables that determine the maximum cable length; wire gauge, power supply

voltage, and load resistance. A minimum operating voltage of 14VDC is required at the

sensor/transmitter. Wire gauge can range from 20 to 16 AWG.

Figure 4-7 Wire Cable Selection Graph