Relay Circuit Wiring - Lenel OnGuard Hardware Installation Manual

A supervised input circuit requires two resistors be added to the circuit to facilitate proper reporting. The
standard supervised circuit requires 1K Ohm, 1% resistors and should be located as close to the sensor as
possible. Custom EOL resistances may be configured via the host software.
37.5

Relay Circuit Wiring

Four relays are provided for controlling door lock mechanisms or alarm signaling. The relay contacts are
rated at 5A @ 30 VDC, dry contact configuration. Each relay has a Common pole (C), a Normally Open
pole (NO) and a Normally Closed pole (NC). When you are controlling the delivery of power to the door
strike, the Normally Open and Common poles are used. When you are 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, it is recommended that either a diode or MOV (metal oxide varistor) be
used to protect the relay.
Wire should be of sufficient gauge to avoid voltage loss.
Terminal Blocks
TB4 Through TB7
1K,1%
1K,1%
1K,1%
1K,1%
TO DC POWER SOURCE
- +
Hardware Installation Guide
Standard Supervised Circuit,
Normally Closed Contact
Standard Supervised Circuit,
Normally Open Contact
Unsupervised Circuit,
Normally Closed Contact
Unsupervised Circuit,
Normally Open Contact
TB10 or TB11
NO
C
NC
NO
C
NC
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