Electronic Security Devices,
Inc
6111 Southfront Rd., Suite
J, Livermore CA 94550
Ph: 925-243-8990 Fax:
925-243-8999 Email: ESD@SecurityPower.com
AN1 High Surge Lock Application
Note
LP-2 Operates High Surge Current
Electric Lock
DESCRIPTION
Figure 1 above shows an
LP-2 and a RT-1 supplying power for a high surge current, 2 stage electric
lock. The first stage of a typical vertical bar electric lock draws 16
Amps for about a ½ of second to unlock the door. After the initial
surge from the first stage, the second stage holding current is about 300ma.
Because the LP-2’s current is limited to 3 Amps, you must use either a
standby battery or capacitor to supply the balance of the high current
surge. After the surge the LP-2 will quickly recharge the storage device.
The capacitor is used when no standby power is desired. The Electrolytic
Capacitors can be obtained from ESD.
The heavy contacts of the RT-1 are
used switch the high current locally to the door locks. Only a small control
current goes back the access control panel.
The SN-1 is placed across the door
lock to suppress interface and protect the LP-2 from the very high spikes
generated from the electric lock.
Refer to Technical Sales Bulletins
LP-2, RT-1, and SN-1 for more information.
(c) Electronic Security
Devices 1998
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