D279A Operation and Installation Guide
Page 10 © 2002 Bosch Security Systems46456E
D279A
Installation
2. Connect the D279A to the panel and protective zones or points as shown in Figure 2 on page 9.
- Install a 1 kΩ EOL beyond the last sensor of both the Delayed and Instant loops to provide a
reference for supervision.
- No terminating resistor is needed on the Burglary (green wire) or Panic (yellow wire) outputs to
the panel.
- If the Panic (yellow wire) and Burglary (green wire) outputs are connected to the same zone or
point, place the J4 jumper on the bottom two pins (see Figure 3 on page 13).
- If the Panic (yellow wire) outputs from several Independent Zone Controls are connected to the
same zone or point, place the J4 jumper on the bottom two pins (see Figure 3) on all but one
D279A.
- Burglary (green wire) and panic (yellow wire) outputs: You cannot connect D279A Burglary and
Panic outputs to the D6112 or D4112 powered loop inputs. Powered loop inputs are D6112
Terminals 16, 17, 18, and 19; D4112 Terminals 16 and 17; and D7112 Terminals 23 and 24.
3. Route the 10-wire color-coded cable through the opening in the back of the enclosure base. Rotate the
conductor so that the red wire (PIN 1) is pointing toward the bottom of the keypad and the orange wire
(PIN 10) is pointing toward the top. Plug the connector into the back of the enclosure.
4. Place the enclosure base on the wall in the desired location, and mark the locations of the mounting holes. (The
base can be mounted to a single-gang wall box. The two mounting screw holes in the base of the D279A are
positioned for standard single-gang compatibility.) Secure the enclosure base to the wall or gang box.
5. Push each key on the keypad towards the top of the enclosure to ensure proper mating with the openings in the
top cover.
6. Align the top two tabs of the enclosure cover with the top two tab slots in the enclosure base. Slide the top of
the cover into the base. Gently push the bottom of the cover down on the base until it snaps into place.
7. Program the passcode (see Section 5.1 User Passcode on page 13).
3.2 Connecting the D279A to the D55 Desk Stand
The wiring cable (with modular plug) that is included with the Desk Stand is not compatible with the D279A. To install a
D279A onto a D55 Desk Stand:
1. Remove the cover as described previously.
2. Plug the 10-wire cable into the D279A.
3. Route the cable through the hole in the desk stand.
4. Screw the base to the Desk Stand, and replace the cover.
To disconnect the D279A, reverse this procedure. The D279A cable plug cannot be removed through the Desk Stand hole.
(2 pages)
(122 pages)
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