UNC100 Axiom Hardware Manual V1.1
RBH Access Technologies Inc.
Page
15
of
20
Outputs
There are two form C relays and two open collector outputs that can be programmed as general purpose
or default applications. The contacts are rated for 2 amperes at 30vdc. The recommended use of the
relays is to provide isolated outputs for driving electric strikes or magnetic locks at a maximum voltage of
24v. The open collector outputs are current limited to 100 milli-amperes direct current only.
Number Default Application
Type
1
Lock Reader 1
Relay form C
2
Forced Entry Alarm Reader 1
Open Collector (100ma)
3
Lock Reader 2
Relay form C
4
Forced Entry Alarm Reader 2
Open Collector (100ma)
Switching Inductive Devices (Locks, Bells)
Exercise caution when switching an inductive load. Inductive devices include external relay, solenoids,
bells, and door locks. All of these devices generate extremely high voltage spikes (
several thousand volts
)
when applied power is removed. Possible disruption of operation could occur if this interference gets on
to the electronic circuit board.
This interference can be suppressed by placing a diode (
1N4001 or similar
) across the lock or other
inductive device being switched. Connect the diode cathode (
end with band
) to the positive terminal
and the other end to the negative terminal. The diode must be placed at the device being switched and
not at the controller.