AM16/32B Relay Multiplexer 14
FIGURE 7-1. Example of AM16/32B-to-data-logger signal connection (4x16 mode)
7.1.3
Measurement terminals
Wire sensors and transducers according to the COM terminal connections and the measurement
instructions in the CRBasic program. See
(p. 15) for details and
(p. 21) for examples.
7.2
Grounding
Connect the AM16/32B ground lug to earth ground via an 8 AWG wire. Keep this connection as
short as possible. The ground lug provides a path to dissipate surges that might propagate on a
sensor shield line. A 35 V varistor is connected internally between the shield ground and the
ground lug to provide surge suppression.
The AM16/32B GND terminal is connected to data logger power ground. The AM16/32B GND
terminal is also connected to the cable shield and, via that, to data logger power ground (see
). If a separate power supply is used, connect the AM16/32B ground to the power supply
ground. Connect an AM16/32B COM
terminal to a data logger signal ground (
⏚
) via the cable
that connects the COM terminals (see
). The data logger must connect to earth ground
by one of the methods described in the installation and maintenance section of the data logger
manual.
7.3
Power supply
The AM16/32B requires a continuous power supply for operation. The positive side of the power
supply is connected to 12V, and the negative side is connected to G. Connect the G wire first for
safety.