8
Entry-Master Option-4 Hardware Installation Guide
3. The relay output connectors are labeled P6 RELAY 1 and
P7 RELAY 2 (see the figures below):
P6 RELAY 1
P7 RELAY 2
4. The relays each have a Normally Open (NO), a Normally Closed
(NC), and a Common (Com) connector. The relays are rated to
accommodate 250VAC and 5 Amps maximum.
5. Fail-safe locking devices will typically use the NC and Com
connectors; Fail-secure locking devices will typically use the NO
and Com connectors.
6. It is recommended that at least 18AWG stranded, unshielded cable
be used. Keep in mind that for every 100 feet of cable used with a
locking mechanism, a voltage drop of approximately 1-Volt will
occur.
7. It is also mandatory that a reverse-biased diode be installed
across the (+) and (-) wires of any inductive coil!! Failure to
heed this warning may result in damage to your Option-4
circuit board. See the wiring diagram on Page 10 for more
details. The recommended part number for the diode is 1N4001.
