Specifications

Halogen Gas Monitor – MultiZone Remote Display
Instruction 3015-5157 15
Changing Terminator Switch Settings
The terminator switch for the RS-485 “TO MONITORS” connector is shipped from the factory in the
terminated or “IN” position. This is the correct setting if the HGM-RD is connected to only one HGM-MZ, or if
it is the last device on a network chain. If the HGM-RD is being installed in the middle of a network, the
terminator must be moved to the “OUT” position. Refer to Multiple HGMs on Page 20.
The terminator switch for the RS-485 “TO HOST” connector is shipped from the factory in the terminated or
“IN” position. This is the correct setting if the HGM-RD is the last device on the network chain. If other
devices are daisy chained through the HGM-RD, the terminator must be moved to the “OUT” position. Refer
to Connecting to a Building Management System on Page 20.
Locate each terminator switch and determine its position. If it needs to be moved, carefully slide the switch to
the proper position.
RS-485
TO MONITOR
Connector
RS-485
TO HOST
Connector
Terminator for RS-485
TO MONITOR
Connector
OUT
IN
Terminator for RS-485
TO HOST
Connector
OUT
IN