Bacharach HGM300 - Manual (Page 10)

RDM800 WIRING SCHEMATIC
B A GND
GND
B A GND
RS485
TO
MONITORS
RS485
TO
HOST
AUXILIARY ALARM RELAYS
5 AMP, 240 VAC
USER DEFINABLE
C NO NC C NO NC
L N
MAIN
PWR
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. INSURE THE DRAIN WIRE IS CONNECTED TO THE GND TERMINAL AT BOTH ENDS.
10