Troubleshooting - eSSL EM lock Installation Manual

INDOOR USE ONLY
Do not run power wires and signal wires in the same cable or conduit.
Do not install a diode in parallel with any magnetic lock. A diode will
cause a delay when releasing the door and residual magnetism to occur.
Although Essl recommends the use of a DC power supply, a
transformer with an adjacent mounted full wave bridge rectifier may be
used. A significant voltage drop will occur when using a full wave
bridge rectifier.
Any low voltage condition will cause erratic operation of the
optional bond sensor.
When using a full wave bridge rectifier, all access controls and/or
release contacts must be located between the Em-lock and rectifier to
ensure quick release.
Trouble Shooting
An electromagnetic lock, magnetic lock, or maglock is a locking device that
consists of an electromagnet and an armature plate. By attaching the electromagnet
to the door frame and the armature plate to the door, a current passing through the
electromagnet attracts the armature plate, holding the door shut. Unlike an electric
strike a magnetic lock has no interconnecting parts and is therefore not suitable for
high security applications because it is possible to bypass the lock by disrupting the
power supply. Nevertheless, the strength of today's magnetic locks compares well
with that of conventional door locks and they cost less than conventional light
bulbs to operate. Power supplies incorporating a trickle-charged lead-acid battery
pack can be used to retain security for short-term power outages.
Principle