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D1255/D1255B | Installation Instructions | 3.0 Installation
4 Bosch Security Systems | 8/04 | 74-06819-000-F
Figure 2: D1255/D1255B Internal Features
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1 2 23
4
5
3
66 783
9
1 - 16-Character Display
2 - Top Tab Slot
3 - Mounting Hole
4 - Keypad
5 - Speaker Volume Control (Potentiometer)
6 - Bottom Tab Slot
7 - Dip Switch
8 - Four-Wire Flying Lead Connector
9 - Speaker
3.0 Installation
3.1 Mounting the D1255/D1255B
The D1255/D1255B Keypad can be mounted using the
following optional packages:
• D54B Keypad Flush Mount Kit (Brass)
• D54C Keypad Flush Mount Kit (Stainless)
• D55 Keypad Desk Stand - Desktop
• D56 and D56R Keypad Conduit Box
3.1.1 Mounting Locations
Do not mount the keypad in a location
where it is exposed to direct sunlight.
Direct sunlight can interfere with the
D1255/D1255B display screen visibility
and damage internal components.
Do not mount the D1255/D1255B in wet
or moist locations.
3.2 Wiring
Data and power connections between the control panel
and the D1255/D1255B require a four-wire flying lead.
The D1255/D1255B includes a wiring assembly
consisting of four color-coded flying leads and a female
four-pin connector plug at one end.
The maximum recommended wire run for each
D1255/D1255B is 2000 ft (610 m) with either 22 AWG
(0.8 mm) gauge or 18 AWG (1.2 mm) gauge wire.
To wire the D1255/D1255B:
1. Power down the control panel.
2. Gently push in the two bottom tabs of the
D1255/D1255B enclosure cover using a small flat-
bladed screwdriver.
3. Lift the D1255/D1255B cover away from the base
as the tabs are pushed back.
4. Set the address switches (refer to Section 3.3.1
Setting the DIP Switches on page 5).
5. Connect the flying leads of the wiring assembly
(provided) to the wires from the control panel
(Table 3).
6. Turn the keypad over and plug in the wiring
connector through the opening in the back of the
enclosure base.
7. Mount the keypad base in the desired location.
8. Secure the keypad in place from inside the
enclosure base by inserting screws in the mounting
holes.
9. Replace the cover by aligning and inserting the top
two tabs of the enclosure cover into the top two tab
slots of the enclosure base.
10. Hold the top edges of the enclosure cover and base
in position.
11. Push the tabs inward.
12. Press the enclosure and cover together until the
cover snaps into place.