Signet 9900 Operating Instructions Manual page 66

H COMM Module Wiring
NOTE: On pages 64-69, the term "9900 Transmitter" or "Transmitter" will assume the H COMM Module is installed
unless otherwise noted.
Multi-Drop Mode
Up to four 9900 Transmitters can be connected in Multi-Drop mode using the H COMM Module.
To ensure proper operation in Multi-Drop mode, confi gure each 9900 Transmitter with its own poll address using a
confi guration tool (laptop or hand-held device).
After confi guring the 9900 Transmitter for multi-drop function, reset the Transmitter (remove power for fi ve seconds
then apply power) before use.
Connecting HART in Multi-Drop mode
Connections
Device 1
Loop +
Loop –
Device 2
Loop +
Loop –
Device 3
Loop +
Loop –
Device 4
Loop +
Loop –
66 9900 Transmitter
9900 (HART Master)
Red
Black
Red
Black
Red
Black
Red
Black
PLC
Device
–
+
(Typical four-unit installation)
Red
Black
Hand-held device
(Secondary HART Master)