AMC SIR Series Руководство по эксплуатации - Страница 9

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AMC-SIR Refrigerant Gas Sensor/Transmitter

4.2 WIRING

The AMC-SIR Refrigerant Gas sensor/transmitter was designed to operate with a power supply

voltage range of 14V to 28VDC. It can be interconnected to a suitable Armstrong monitor panel

or be powered from a stable 14-28VDC power source, with its 4-20mA signal interconnected to

a suitable measuring device.

For best signal transmission and maximum noise rejection, it is recommended to run the three

conductor shielded installation cable through steel conduit (the cable shield must be chassis

grounded at the monitor or power supply).

4.2.1 MONITOR AND POWER SUPPLY WIRING

All field wiring connections for the AMC-SIR Refrigerant Gas sensor/transmitter are made via

TB2. Figure 4-2 shows the wiring layout of the AMC-SIR Refrigerant Gas sensor/transmitter.

TB1

TRANSMITTER

LED1

POWER

Figure 4-2 AMC-SIR Refrigerant Gas sensor/transmitter layout

4.2.1.1 THE ANALOG INTERFACE

The analog interface of the AMC-SIR Refrigerant Gas sensor/transmitter offers a linearized 4-

20mA analog current signal; proportional to the concentration of gas measured. This signal is

interpreted by the interconnected monitor.

Alternatively, the AMC-SIR Refrigerant Gas sensor/transmitter can also be used independently,

with its 4-20mA output connected to a suitable measuring device.

The standard configuration for output current is 4-20mA with the JP3 jumper installed.

(Condition as delivered) See Fig 4-3.

TP1

V+

TP2

SIG

TB2

TO MONITOR

LANDING POINT FOR CABLE SHIELD

CHG

INVERTED SIGNAL LINE FOR THE INTEGRATED RS485 INTERFACE

RS-

NON - INVERTED SIGNAL LINE FOR THE INTEGRATED RS485 INTERFACE

RS+

V+

POWER SUPPLY CONNECTION 14 - 28VDC

V+

SigV

Ret

SIGNAL OUTPUT CONFIGURED FOR 4-20mA

COMMON GROUND

GND

TP3