770 and 771 Security Command™ Keypads
770 and 771 Security Command™ Keypads
The DMP 770 and 771 Security Command keypads provide an attractive, user-friendly control with optional
2-button Panic keys for use with DMP Command Processor™ panels. Each keypad provides supervised or unsupervised
operation, an easy-to-read 16-character ßuorescent blue display, an AC LED, backlit keyboard, low proÞle styling,
and a choice of designer colors to compliment a variety of room decors.
You can also connect a variety of burglary and non-powered Þre devices to the four programmable expansion zones
on the 770 and 771 keypads. Additionally, the 771 provides an internal Form C door strike relay for controlling
magnetic locks or electric door strikes on protected entrances.
The keypads contain an AC LED that turns off when AC power to the panel is off or while the panel resets.
771 Door Strike Relay
The 771 provides one Form C (dry contact) relay output for controlling magnetic locks or electric door strikes on
protected doors. These devices connect to the Violet (N/C), Gray (Common), and Orange (N/O) conductors on the
harness supplied with the 771 keypad. The relay contacts are rated for 1 Amp at 24 VDC.
Harness Color Code
Refer to Figure 1 for harness connections and color codes. The Form C relay output 3-wire Orange, Gray, and Violet
harness is only available on the 771 model.
771 Keypad Only
Orange – Door Strike Normally Open (N/O)
Gray – Door Strike Common (C)
Violet – Door Strike Normally Closed (N/C)
1k EOL
White/Yellow – Zone 4
1k EOL
White/Orange – Zone 3
1k EOL
White/Red – Zone 2
1k EOL
White/Brown – Zone 1
Both 770
AND 771
Black – Ground (GND)
Green – Receive Data
Yellow – Send Data
Red – Auxiliary Power
Figure 1: 770/771 Wiring Harness
Wiring SpeciÞcations
Several factors determine the performance characteristics of the DMP LX-Bus™ and keypad bus: the length of wire
used, the number of devices connected, and the voltage at each device. When planning an LX-Bus™ and keypad bus
installation, keep in mind the following four speciÞcations:
1. DMP recommends using 18 or 22-gauge unshielded wire for all keypad and LX-Bus circuits. Do Not use
twisted pair or shielded wire for LX-Bus and keypad bus data circuits. All 22-gauge wire must be connected
to a power-limited circuit and jacket wrapped.
2. On Keypad bus circuits, to maintain auxiliary power integrity when using 22-gauge wire do not exceed 500
feet. When using 18-gauge wire do not exceed 1,000 feet. To increase the wire length or to add devices,
install an additional power supply that is UL listed for Fire Protective Signaling, power limited, and regulated
(12 VDC nominal) with battery backup.
Note: Each panel allows a speciÞc number of supervised keypads. Add additional keypads in the
unsupervised mode. Refer to the panel installation guide for the speciÞc number of supervised keypads
3. Maximum distance for any one bus circuit (length of wire) is 2,500 feet regardless of the wire gauge. This
distance can be in the form of one long wire run or multiple branches with all wiring totaling no more than
2,500 feet. As wire distance from the panel increases, DC voltage on the wire decreases. Maximum number
of LX-Bus devices per 2,500 feet circuit is 40.
4. Maximum voltage drop between the panel (or auxiliary power supply) and any device is 2.0 VDC. If the
voltage at any device is less than the required level, add an auxiliary power supply at the end of the circuit.
When voltage is too low, the devices cannot operate properly.
For additional information refer to the 710 Installation Sheet (LT-0310) and or the LX-Bus/Keypad Bus Wiring
Application Note (LT-2031).
Mounting Options
For mounting 770 or 771 keypads on solid or uneven walls, you can use the DMP Model 776 Metal Keypad Backbox.
The 776 is 1/2" deep with a baked enamel Þnish and provides one 3/4" wire entry hole on the back for convenient
For applications where conduit is required to the keypad, use the DMP Model 775 Metal Keypad Backbox. The 775 is
1-1/2" deep with three 1/2" and 3/4" knockouts located in the center back and centered on two sides for connecting
To provide additional keypad protection against tampering or unauthorized use, install the DMP Model 777 Plastic
Keypad Cover to provide a wall-mounted clear 1/8" thick polycarbonate housing with lifting cover and integral
locking mechanism. Refer to 777 Install Guide (LT-0175).
Additional Power Supply
If the current draw for all keypads connected to the panel exceeds the panel output, you can provide additional
current by adding an auxiliary power supply. Connect all keypad Ground (common) wires to the power supply
negative terminal.
Run a jumper wire from the power supply negative terminal to panel terminal 10. Connect all keypad power (+12
VDC) wires to the power supply positive terminal. Do NOT connect the power supply positive terminal to any panel
Note: The power supply must be UL Listed for use with Burglar Alarm Systems.
DMP Bus without a Power Supply
Voltage across red and black at all devices
must be 11.8 VDC or greater.
Voltage across red and black here is 13.8 VDC.
Bus Devices
Voltage of the Red and Black wires at the panel is 13.8 VDC.
11.8 VDC
DMP Bus with a Power Supply
Do not connect the red wire between the panel and
the first device when using an auxiliary power supply.
Voltage across red and black here is 13.8 VDC.
11.8 VDC
Bus Devices
11.8 VDC
11.8 VDC
Figure 2: Power Supply and Maximum Voltage Drop
2-Button Panic Keys
The 770 and 771 keypads also provide an optional Panic key function that allows the user to easily send a Panic,
Emergency, or Fire report to the central station. The user presses and holds two top row Select keys for two seconds
until the keypad beeps. Figure 3 shows Panic key label placement.
Top Row Select Keys
Label shows
icons only
Figure 3: Panel Key Label Placement
At the beep, the panel sends the following zone alarm reports to the central station: Panic (left two Select keys) Zone 19, non-medical Emergency (center two Select keys) - Zone 29, and Fire (right two Select keys) - Zone 39.
Digital Monitoring Products
770/771 Keypad Installation Sheet
The Panic key function activates as soon as you apply power to the keypad. No additional zone programming is
necessary. If the system owner intends to use the Panic keys, install the supplied icon label below the top row of
Select keys. To disable the 2-button Panic keys, cut J8 jumper located at the bottom left side of the keypad circuit
7/0 Panic Keys
The Security Command keypads also allow the user to initiate a Panic alarm by pressing the 7 and 0 (zero) keys
simultaneously when zone 1 on the assigned keypad address is programmed as a Panic-type zone. Place a 1k Ohm
End-of-Line resistor across the White/Brown pair of zone wires (Zone 1).
To disable the 7/0 Panic key feature, cut J7 jumper located on the bottom left side of the keypad circuit board.
Unsupervised Operation
The 770 and 771 Security Command keypads also allow unsupervised operation to connect multiple keypads to one
of the panel's available keypad addresses. This feature greatly expands the number of keypads you can install to
give users the maximum ßexibility in system operation. Unsupervised keypads communicate with the panel only
when keys are pressed by the user and work on all DMP panels. See Address Programming below. Keypads must be
supervised if they are programmed for Device Fail Output. Refer to the panel installation or programming guide for
more information on using the Device Fail Output.
Address Programming
Use the slide switches numbered 1, 2, and 3 on the left side of the circuit board to set the keypad to one of
the panel's eight available addresses. Move slide switch number 4 down for supervised operation and up for
unsupervised operation. Multiple unsupervised keypads can be assigned the same address. See Figure 4 for keypad
switch addressing.
Supervised Keypad Addresses
1 2 3 4
1 2 3 4
1 2 3 4
1 2 3 4
1 2 3 4
1 2 3 4
1 2 3 4
1 2 3 4
Unsupervised Keypad Addresses
1 2 3 4
1 2 3 4
1 2 3 4
1 2 3 4
1 2 3 4
1 2 3 4
1 2 3 4
1 2 3 4
Figure 4: Addressing Switches
Table 1 lists the DMP panels and indicates the number of supervised keypads the panel supports.
DMP Command Processor Panel Number of Supervised Keypads *
XRSuper6, XR20
XR40, XR200, XR2400F
* XR200-485
* XR200-485 panel supports 16 supervised keypads.
The 770, 771 Keypads only support 8 supervised keypads.
Table 1: DMP Panels and Supervised Keypads
Dimming the Keypad Display
As an added customer convenience, pressing and holding the COMMAND and Back Arrow keys for two or more seconds
turns off the vacuum ßuorescent display, keyboard backlighting, and Power LED . These indicators are restored
whenever the keypad speaker is turned on or any key on the keyboard is pressed.
The keyboard backlighting turns off automatically after 30 seconds if no keys are pressed and the trouble buzzer is
not active.
770/771 Keypad Installation Sheet
Digital Monitoring Products
Self-Test Diagnostics
The 770 and 771 keypads allow you to test all system keypad functions. To test the keypads:
• Disconnect the red (+12 VDC), yellow, and green keypad wires from the panel.
• Twist the yellow and green keypad wires together. Reconnect the red wire to the panel.
To go to the next test, press the COMMAND key. To repeat a test, press the Back Arrow key.
This test begins immediately and scrolls a series of characters across the display allowing you to visually inspect
each segment of the display.
This allows you to check each key for proper operation. The display shows: PRESS KEY— . As you press and hold
each key, its number displays as KEY X (X represents the key number).
This allows you to check each keypad zone for proper operation. The display shows: L1 L2 L3 L4. Following each
zone number is the zone status. (O) = Open, (–) = OKAY, and (S) = Short.
This allows you to check the AC LED, relay, and keypad tone for proper operation. The display reads: LED RLY
TONE. To test each function, press the select key beneath the name of the function. The keyboard backlight turns
off during this test. The RLY (relay) function is only available on 771 keypads.
This test displays the keypad address selection. The display ADDRESS 3 U indicates the keypad being tested is set
to address 3 and is also unsupervised. Supervised keypads show only the address number. To end the Address Test,
press COMMAND.
Reconnecting the keypad wiring
Disconnect the red wire from the panel. Separate the yellow and green keypad wires and reconnect them to the
panel. Connect the red wire to the panel. Press COMMAND to start normal keypad operation.
Additional Diagnostics
If a key is pressed and the keypad has not been polled by the panel within the past 5 seconds, the keypad displays
Also, if at any time during normal operation a supervised keypad cannot detect polling from the panel for 90
seconds, the display shows: SYSTEM TROUBLE. This could indicate a broken green wire, reset jumper installed, or a
problem with the keypad.
If a supervised keypad detects polling, but its particular address is not being polled, the display shows: NONPOLLED ADDR. To clear this display, check the keypad address selection or the number of keypad addresses you
have assigned during system programming.
Operating Voltage 8.0 VDC to 16 VDC
Current Draw
100mA + 1.6mA
per active zone
100mA + 2mA
+ 20mA w/ annunciator ON
771 Internal Relay 30mA when door strike is
Keypad Conduit Backbox
Keypad Backbox
Protective Keypad Cover
Weatherproof Cover Gasket
Cover Spacer
Keypad Deskstand
Replacement Harness
Replacement 5-foot Harness
2500 North Partnership Boulevard
Made in the USA
Springfield, Missouri 65803-8877
LT-0110 (1/04) © 2004 Digital Monitoring Products, Inc.
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