2.10 Relay circuit wiring
Four Form-C contact relays are provided for controlling door lock mechanisms or alarm signaling. The relay contacts are
rated at 2 A @ 30 V DC, resistive and are in a dry contact configuration. When you are controlling the delivery of power to
the door strike, the Normally Open and Common poles are used. When momentarily removing power to unlock the door,
as with a mag lock, the Normally Closed and Common poles are used. Check with local building codes for proper egress
door installation.
Door lock mechanisms can generate feedback to the relay circuit that can cause damage and premature failure of the
relay. For this reason, a diode must be used to protect the relay. Wire should be of sufficient gauge to avoid voltage loss.
Caution: It is possible for the MR62e to provide power for a 12 V DC door strike providing the maximum
current is not exceeded, see Specifications.
Diode selection
l
Diode current rating: 1x strike count.
l
Diode breakdown voltage: 4x strike voltage.
l
For 12 V DC or 24 V DC strike, diode 1N4002 (100V/1A) typical.
PLT-05249, A.1 11 August 2022
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HID®Mercury™ MR62e OSDP Reader Interface
Installation and Specifications
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