Campbell SDM-CD16ACA, Product Manual

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Position of contacts when
coil is energized (ON)
Position of contacts when
coil is not energized (OFF)
Figure 4-1. Switch operation
In most applications, the SDM-CD16ACA acts as a switch (controllable break) in one wire of the
circuit powering the controlled device. One side of this break may have power (hot).
Figure 4-2
(p. 6) shows an example.
Figure 4-2. Typical wiring application
4.1.3 Motor control
The SDM-CD16ACA is a UL approved Start/Stop motor controller. In Figure 4-3 (p. 7), a typical
5 Amp 115 VAC relay contact circuit shows how to control a three phase motor starter in a Motor
Control Cent
re
(MCC). Typically, the data logger will automatically command the appropriate
relay to energize the motor starter. The relay in the SDM-CD16ACA will remain latched until the
data logger program commands that the motor be turned off, at which time the relay will open
the circuit to the motor starter and the motor will stop.
SDM-CD16ACA 16 Channel AC/DC Controller 6