Wire The Access Control Lock - DMP Electronics 734INT Installation And Programming Manual

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Wire the Access Control Lock

The 734INT provides a Form C (SPDT) relay for controlling locks and other
electronically‑controlled barriers. The three relay terminals marked NO C NC allow
you to connect the device wiring to the relay for module control.
Use an additional power supply to power magnetic locks and door strikes. See
Figure 3 and Figure 4 for typical magnetic lock and door strike wiring.
The Form C relay draws up to 35 mA of current and contacts are rated for 10 Amps
(resistive) at 12/24 VDC. When connecting multiple locks to the Form C relay, the
total current for all locks cannot exceed 10 Amps. If the total current for all locks
exceeds 10 Amps, problems may arise and an isolation relay may be needed. Refer
to "Isolation Relay (optional)" for more information.
Mag lock positive
to Terminal NC
+ –
Magnetic Door
Lock
Figure 3: Typical Magnetic Lock Wiring
Digital Monitoring Products, Inc.
Normally Closed
Power supply positive
to Terminal C
12/24 VDC
Power Supply
Model 333
Suppressor
Mag lock negative to
power supply negative
| 734INT Installation and Programming Guide
Normally Open
Door strike positive
to Terminal NO
+ –
Model 333
DC Door Strike
Suppressor
Door strike negative to
power supply negative
Figure 4: Typical Door Strike Wiring
Power supply positive
to Terminal C
12/24 VDC
Power Supply
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