Digital Monitoring Products Inc PC0131 Manual De Usuario

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7800 Series Keypad Installation Guide 
3
PRELIMINAR
Y
Installing the Keypad
All DMP keypad housings are designed to easily install on any single-gang switch box, 
or a flat surface.  Figure 1 shows the keypad housing base mounting hole locations.
Remove the Cover
The keypad housing is made up of two parts: the cover, which 
contains the circuit board and components, and the base.  Use 
the following steps and figures to separate the keypad cover 
and base.  
1.  Insert a flat screwdriver into one of the slots on the 
bottom of the keypad and gently lift the screwdriver 
handle toward you while pulling the halves apart.  Repeat 
with the other slot.  
2.  Using your hands, gently separate the front from the base 
and set the cover and components aside.
Harness Wiring
Figure 1 shows wiring harness assignments.  Observe wire colors when connecting the 
red, yellow, green, and black wires to the keypad bus.  Connect red to panel terminal 
7, yellow to terminal 8, green to terminal 9, and black to panel terminal 10.  Use 1k 
Ohm EOL resistors, DMP Model 311, on keypad zones 1 through 4. 
The 7860, and 7863 keypads are supplied with a 4-wire harness for panel keypad bus 
connection.  
The 7870, and 7873 keypads are supplied with a 12-wire data bus/zone harness.  Four 
wires connect to the keypad bus.  The remaining eight wires are for the four zone 
inputs: two wires for each zone.  
The 7873 keypad comes with one 5-wire output/reader harness.
Additional Power Supply
If the current draw for all keypads exceeds the panel output, provide additional 
current by adding a Model 505-12 auxiliary power supply.  Connect all keypad black 
ground wires to the power supply negative terminal.  Run a jumper wire from the 
power supply negative terminal to the panel common ground terminal.  Connect 
all keypad power (+12 VDC) wires to the power supply positive terminal.  Do NOT 
connect the power supply positive terminal to any panel terminal.  Refer to the  
505-12 Power Supply Installation Guide (LT-0453).  
Graphic
Keypad
Building Wall
 
Insert small 
screwdriver and 
lift to remove 
cover.  
Do not twist.