14
Installation
Output connections are made to the small terminal block on the
board (TB502). Connect the output leads to terminal 1 and 2
(Figure 8, page 16). When the input signal at INPUT1 is positive
with respect to COM terminal 2 will be positive.
The exception to this polarity rule occurs when the PCM4 has
been calibrated to bias its output as a voltage follower. An input
of zero volts can be calibrated to produce a finite positive or
negative output voltage.
The PCM4 output is a floating DC voltage. It is brought into the
speed setting circuit of a variable speed drive to replace the main
speed adjust potentiometer.
Output voltage connections
Warning
Always check the instruction manual supplied with the
variable speed drive that will be interfaced with the PCM4
module. The scheme shown for wiring to an external voltage
source, as well as the specifications on that input, must be
well understood before proceeding.
m
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