Connection And Wiring - Campbell SDM-SI01A Product Manual

Table 6-1: SDM address settings
Rotary switch position
E
F1
1
Address F is not available as it is the broadcast address. Setting this address will result in the SDM-SIO1A having an
address of 0 rather than F.

6.2 Connection and wiring

Connection to the SDM-SIO1A is achieved via the 11 terminals arranged along the top of the unit.
The terminals are spring loaded providing an easy and reliable method of connection. Strip wires
7 to 9 mm and twist. Open the clamp by pushing the orange tab down with the tip of a small flat-
blade screwdriver and insert the wire into the round hole. Release the clamp and verify the clamp
grips the wire rather than the plastic insulation.
If there is a need to insert more than one wire in each terminal, if using multi-strand wire, twist
the conductors together first. If using solid wires, solder or crimp multiple pairs together before
insertion.
Table 6-2 (p. 11) shows all the connections on the SDM-SIO1A.
Table 6-2: SDM-SIO1A terminal labels and functions
Power
12V G C1
1 2 3
Table 6-3: SDM-SIO1A functional description of the connections
Pin
1
2
3
4
5
SDM
C2 C3 RG
4 5 6
Case text
12V
G
C1
C2
C3
SDM-SIO1A and SDM-SIO4A Serial Input/Output Modules
SDM address
14
151
Communications connections
G RTS/TD+
7 8
Connection to
Data logger
SerialOpen() instruction
COMPort number
46
471
Tx/TD– Rx/RD+
9 10
Description
Power supply +12V
Power supply 0V (same as
other G pin)
SDM_Data
SDM_Clock
SDM_DataEnable
CTS/RD–
11
11