Specifications
Digital Monitoring Products 690/690F/790/790F/791/793 Installation Sheet
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690/690F/790/790F/791/793 Installation Sheet Digital Monitoring Products
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791/793 Door Strike Relay Specications
The 791/793 keypad provides one internal Form C single pole, double throw (SPDT) relay for controlling door strikes
or magnetic locks. Three wires on the 5-wire harness, Violet (N/C), Gray (Com), and Orange (N/O), allow you to
connect devices to the relay. The Form C relay draws up to 30mA of current and its contacts are rated for 1 Amp at
24 VDC.
Note: For UL installations, the door strike relay must be connected to devices within the same room.
Wiring the 333 Suppressor
One Model 333 Suppressor is included with the 791/793 Keypad. Refer to Figure 3 and install the suppressor across
the 5-wire output/reader harness Common (C) and Normally Open (NO) or Normally Closed (NC). This suppressor
replaces a diode that shipped with early 791/793 modules.
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 as well. Conversely, if the device is connected to the NC and C terminals, install the 333 Suppressor
on NC and C terminals.
Figure 3: 791/793 5-wire Harness and Suppressor Installation
791/793 Door Strike Relay Operation
As soon as the user code sent from the reader is veried by the panel, the keypad Door Strike relay activates for ve
seconds. During this time, the access door connected to zone 2 must be opened to start the 40-second entry/exit
timer and zone soft shunt. See the timeline shown below.
Note: The 5-second delay length is programmable when the keypad is used on an XR200-485 or XR500 Series panels.
Refer to the XR500 Series Programming Guide (LT-0679) or the XR200-485 Programming Guide (LT-0197).
790/790F, 791/793 Door Contact Zone with Soft-Shunt™
If the door being released by the keypad is protected, you can provide a 40-second shunt by connecting its contact
to zone 2 (White/Red pair) on the keypad and enabling the Soft-Shunt feature. See ZONE 2 SHUNT and Door Strike
Relay Specications in this document. Once the door strike relay is activated, the user has 5 seconds to open the
door connected to zone 2. The zone is then shunted for 40 seconds. Door contacts may be N/C or N/O.
5 Second
Strike
40-Second "Soft-Shunt"
and entry/exit timer.
At 30 seconds
,
the keypad beep
s
if door is still open.
End of
timer.
40
Sec
onds
A zone fault is indicated
if door is still open.
Figure 4: Door Strike Relay Operation Time Line