![background image](http://html1.mh-extra.com/html/campbell/sdm-sio2r/sdm-sio2r_product-manual_3760120019.webp)
NOTE:
The sensor with the highest current draw should be connected to the SDM-SIO2R that is
plugged into power and communications on the Input connector. It is recommended that
this is the center SDM-SIO2R in the system.
(p. 16) shows all the input connections on the SDM-SIO2R.
Table 6-2: SDM-SIO2R input terminal labels and functions
Power
SDM
V
+
V
-
12V
G
C1
C2
C3
1
2
3
4
5
6
7
(p. 16) shows all the serial communication connections on the SDM-SIO2R. Note that
there are two communication connectors. One for Sensor 1 and one for Sensor 2.
Table 6-3: SDM-SIO2R communication terminal labels and functions
Communication
RG
GND
RTS
Tx
CTS
Rx
1
2
3
4
5
6
SDM-SIO2R Serial Input/Output Module with Switched Sensor Power
16