Access control applications
3.42 EST3 Installation and Service Manual
Power from a remote source
Description of the application
By remote power, we mean that the CRC provides the power to
operate the electronic door strike or maglock by using a remote
DC power supply. This additional power can provide continuous
power to the door strike or maglock.
A typical CRC using remote power is shown in Figure 3-16. The
additional power is needed because the CRC battery can not
keep up with the power needs of maglocks or strikes with an
active duty cycle greater than 30 seconds in a minute. In these
conditions the battery does not have enough time to charge and
keep up with the drain.
The figure shows power coming from the additional remote
power supply to power the CRC and maglock. The supply is
supervised by the Signature data circuit derived from the 3-
SSDC(1) module. The 3-SAC connects to the CRC through the
SAC bus.
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