Bosch Appliances Smoke Alarm D1257RB User Manual

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D1255RB/D1256RB/D1257RB | Installation Instructions | 3.0 
Installation 
 
 
Bosch Security Systems, Inc. | 8/06 | F01U011791B 
 
 
 
Warning: Avoid injury. Do not wire the 
D1255RB, D1256RB, or D1257RB if 
power is applied to the control panel. 
8.
 
Connect the flying leads on the wiring harness 
(Figure 10) to the wiring terminals on the control 
panel. Refer to Table 2
Table 2: 
Keypad or Annunciator Connections 
 
D9412GV2/ 
D7412GV2 
Terminal Function 
Keypad 
Wire Color
Function 
32*
 
POWER + 
Red 
12 VDC 
31 
DATA BUS A 
Yellow 
Data 
30 
DATA BUS B 
Green 
Data 
29 COMMON 
Black 
Common 
*  Connect with at least 1.5 m (5 ft.) of 0.8 mm (22 AWG) wire 
(4.3 m [14 ft.] of 1.2 mm [18 AWG] wire). 
9.
 
Feed the connector end of the wiring harness 
through the opening in the back of the enclosure 
base (Figure 10). 
10.
 
Secure the keypad or annunciator to its mounting 
location from inside the enclosure base by inserting 
screws through the mounting holes (Figure 10). 
 
Figure 10:  Mounting the Enclosure Base 
2
3
4
5
1
1
1
1
 
1 -  Mounting hole 
2 -  Flying leads 
3 -  Wiring harness 
4 -  Opening 
5 -  Connector 
 
11.
 
Connect the wiring harness to the connector on the 
back of the keypad or annunciator (Figure 11). 
 
Figure 11:  Wiring Harness Connection to Keypad 
or Annunciator 
1
 
1 -  Connector 
 
12.
 
Replace the faceplate. 
13.
 
Replace the cover. Align and insert the top two 
tabs of the cover into the top two tab slots on the 
front of the keypad. 
14.
 
Install the enclosure base: 
a.
 
Hold the unit at an angle to the enclosure base 
and snap the hinges on the top edge of the unit 
into place first. 
 
Figure 12:  Installing the Enclosure Base 
 Top  
 
1 -  Hinges 
b.
 
Press the bottom edge of the unit toward the 
enclosure base until the tabs snap into the 
openings in the base. 
Figure 13:  Closing the Enclosure Base – Bottom 
 
1 -  Enclosure base 
2  
Tabs