time and delay between relays,
(see photo 6).
On the rear of the unit is dip3,
(see photo 7). There are two
relays with connections along
with power (see photo 8), request
to exit and a door contact input
connection, (see photo 9). Dip3
is also used to adjust the colors
of the LED’s. The CM-332 is sup-
plied with two, 3 Amp form ‘C’
relays. There is a delay between
the operation of one relay and the
second relay which is adjustable
using pot3 on the front of the
The CM-330 is the next hands
free switch we will look at, (see
photo 10). This is a battery pow-
ered unit that has an RF transmit-
ter that sends a signal to open to
a remote receiver. This means
that there are no wiring needed.
The switches at the bottom are to
enable sound and LED operation
as well as an alarm if something
is blocking the IR sensor beam
for more than 30 seconds, (see
photo 11). The pot at the top of
the unit is to adjust the range of
the sensor, (see photo 12).
On the rear of the unit is the
battery connection, request to
exit connection and the radio
4. CM-332 hands free door
5. Dip switches for selecting
6. Pots for adjusting features.
7. The back side of the CM-332 9. More screw down terminals for
power and other features.
8. Two form ‘C’ relays with screw