17 GMC-I Messtechnik GmbH
Connections Overview, Revision V3
Jumper Layout
(defaults)
Terminal Strip Pin Assignments (9)
M-Bus mains connection
MBUS+
MBUS-
System ground
GND
RS 485/2 interface connection
A (data+)
B (data-)
System ground
GND
FIELD1 (RS 232) interface connection
Rx
Tx
M-Bus Port Selector SV14 (27)
These two jumpers can be used to select via which interface the optional M-Bus module will communicate. Either
M-Bus (7) or FIELD2 (10) can be selected.
SV14, selection of M-Bus interface (7)
SV14, selection of FIELD2 interface (10)