Bacharach HGM300 - Manual (Page 7)

HGM300 WIRING SCHEMATIC
COMMON
COMMON
LOOP 1 ZONE
LOOP 2 PPM
OPTIONAL
DUAL LOOP
4-20 MADC
RS485
B A GND
ALARM RELAYS 5 AMP, 240 VDC
LEAK SPILL EVACUATE SYS FAULT
1C NO NC 2C NO NC 3C NO NC 4C NO NC
MAIN
PWR
BKR
L N
AUX
PWR
L N
MAIN
PWR
GND
SPECIAL NOTE: TO ESTABLISH THE RS485 COMMUNICATION LINK WITH THE RDM800 OR WITH A BUILDING
MANAGEMENT SYSTEM, USE #18 GAGE AWG, MULTI-STRANDED, SHIELDED AND TWISTED PAIR, INSTRUMENT CABLE.
ENSURE THAT THE DRAIN WIRE IS CONNECTED TO THE GND TERMINAL AT BOTH ENDS.
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