Securitron DK-26 User Manual
Page 22
PN# 500-16900
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Rev. D, 12/11
noise producing devices such as motors, fluorescent or neon lighting etc. The same problem can
occur if the cable from an exit switch is extended a long way from the CPU board. If there are
noise sources, it may be necessary to limit the cable run distances while also trying to avoid the
noise sources.
If the problem shows up frequently, it is usually bad power. This particularly occurs when a fail
secure lock is operated from the same supply as the DK-26. When the lock is energized, it may
draw too much power for the power source. This reduces the voltage and these voltage swings
can crash the microprocessor. The solution is either to use a power supply with greater capacity
or use two power supplies: one to operate the DK-26 and the second to operate the fail secure
lock through the DK-26's lock control relay.
IF THE PROBLEM PERSISTS
CALL SECURITRON TOLL FREE: 1-800-MAG-LOCK
MAGNACARE
LIFETIME REPLACEMENT WARRANTY
For warranty information visit
www.securitron.com/en/site/securitron/About/MagnaCare-Warranty/