Power For Intermittent Locks - GE Security EST3 Installation And Service Manual

Power for intermittent locks

EST3 Installation and Service Manual
Description of the application
By intermittent locks, we mean locks that operate, on average,
less than 30 seconds in every minute. In these applications, the
CRC battery can provide the power needed to operate the lock.
The CRC can be powered by the 3-PPS/M. It uses this power
source to charge an internal 1.2 Ah sealed lead acid battery. The
battery then provides the power needed to operate the door lock.
Because the battery powers the door strike, this configuration
cannot be used for maglocks or strikes that are active more than
30 seconds in a minute. In these conditions the battery would not
have enough time to charge and keep up with the drain. For
heavy or continuous duty applications, refer to the topic Power
for continuous locks presented in this chapter.
A typical application using CRC battery power is shown in
Figure 3-13, below.
Control panel
3-PPS/M 3-SAC
CRC
Card
Strike
reader
Figure 3-13: CRC controlling an intermittent strike
Access control applications
24 Vdc
SAC bus
Other factors
X Power supply
X Hardware configuration
X SDU programming
X ACDB/KDC operation
3.37