Digital Monitoring Products, Inc | 7800INT Series International Installation and Programming Guide
10
Wire the Electronic Lock
7873-WINT keypads provide a Form C (SPDT) relay for controlling locks and other
electronically-controlled barriers. Form C relay draws up to 15 mA of current. The
contacts are rated for 1 Amp at 30 VDC maximum, resistive. The three 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.
Wire the 333 Suppressor
Use the included 333 suppressor with the keypad to suppress any surges caused
by energizing a magnetic lock or door strike. Install the 333 across the keypad
C
(common) and
NO
(normally open) or
NC
(normally closed) terminals.
If the device being controlled by the relay is connected to the
NO
and
C
terminals,
install the suppressor on the
NO
and
C
terminals. Conversely, if the device is
connected to the
NC
and
C
terminals, install the 333 Suppressor on
NC
and
C
terminals. See Figure 7 and Figure 8.
4
5
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