Campbell SDM-CD16ACA, Product Manual

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4.1 Wiring
4.1.1 SDM-CD16ACA power and control connections
Refer to Figure 3-1 (p. 3) and Table 4-1 (p. 5) for SDM-CD16ACA operating power and control
connections to the data logger.
Table 4-1: Data logger to SDM-CD16ACA connections (see caution)
Connection Order SDM-CD16ACA
Data Logger
(see notes)
Function
First 12V
12 V on data logger or
External supply
Power
Second G Gnd Common ground
C1
SDM-C1 (CR3000) or
C1 (other data loggers)
Data
C2
SDM-C2 (CR3000) or
C2 (other data loggers)
Clock
C3
SDM-C3 (CR3000) or
C3 (other data loggers)
Enable
CAUTION:
The order in which connections are made is critical. Always connect 12 V first, followed by
ground, then Control Ports.
NOTE:
The CR6 allows SDM operation through terminals C1, C2, and C3 as shown in
Table 4-1 (p. 5).
In addition, the U terminals on the CR6 may be used in the same manner. U1–U3, U5–U8, and
U9–U11 are usable in the same Data, Clock, Enable order as the C terminals.
4.1.2 Controlled device to SDM-CD16ACA connections
DANGER:
ELECTROCUTION HAZARD! USE EXTREME CAUTION WHEN WORKING WITH HIGH
VOLTAGE INPUTS. DO NOT COME IN CONTACT WITH HOT LEADS!
Figure 4-1 (p. 6) shows how the switches in each channel operate. NO means “normally open”,
NC means “normally closed”. COM means “common” to NO and NC.
SDM-CD16ACA 16 Channel AC/DC Controller 5