GateKeeper Interface
Relay Terminals
These terminals are for signalling the access control device. For loads over 2A, we do not
recommend connecting directly. Use a secondary relay as a buffer instead.
NO
Relay normally-open contact
COM
Relay common terminal
NC
Relay normally-closed contact
As access control devices are often inductive, switching off the current can cause a voltage spike
on the wires to the access control, damaging the reader. A snubber should be fitted near any
switch or relay contacts, for DC circuits a silicon rectifier diode such as IN4001 (supplied) is well
suited. Please note that the diode must be wired according to the diagram. The wrong polarity will
cause a short circuit, and damage the power supply.
The diode
MUST
be wired correctly according to the diagram, otherwise there may be
cumulative electrical damage to the GateKeeper board, the reader unit, or the device
power supply.
EPIC Sanctuary
78-106 Manchester St
Christchurch 8011
New Zealand
PO Box 13352
Armagh Mail Centre
Christchurch 8011
New Zealand
NZ (+64) 3 668 5727
AU (+61) 1800 849 001
US (415) 915 0375
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