Bacharach HGM300 - Page 8

8 Instruction 3015-4149
RDM800 WIRING SCHEMATIC
L N
MAIN
PWR
C NO NC C NO NC
AUXILIARY ALARM RELAYS
5 AMP, 240 VAC
USER DEFINABLE
RS-485
TO
HOST
SPECIAL NOTE: TO ESTABLISH THE RS-485 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.
RS-485
TO
MONITORS
B A GND
GND
B A GND