Essex Electronics, Inc. | 805.684.7601 | 800.KEY-LESS | fax 805.684.0232 | keyless.com
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If communication is lost with the ERM or the ERM is in LockUp
Mode, the Keypad will indicate the problem by flashing the Red
LED very fast.
Since the Encode Code (EC) is only sent at the beginning of a
Latch Open sequence, this is the only time the unit knows if the
EC’s match. Upon a power up, both units will communicate with
each other and the second and third relays, remote bypass and
clock input will work normally. Upon the first attempt to send an
ERM packet with a non- matching EC, the device will be put into
the LockUp mode, and from that point, until a new EC is pro-
grammed, the unit will essentially be shut down.
Pressing the PROGRAM button while the unit has lost communi-
cation can cause the EC to be erased and will require an EC setup
upon re-establishing communication. For this reason, it is recom-
mended that the Keypad and the ERM be powered by the same
power supply so they are both powered up and down at the same
time.
Since the output is on to indicate a Non-Alarm status when using
Output B relay as an Alarm, a loss of communication or invalid EC
will always create an alarm indication.
