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D1255/D1255B | Installation Instructions | 1.0 Description
2 Bosch Security Systems | 8/04 | 74-06819-000-F
1.0 Description
The D1255/D1255B Keypad is an SDI Bus compatible
device used with Bosch Security Systems control
panels. The D1255/D1255B features a keypad that
illuminates when you press the keys, a 16-character
English language display, and a built-in speaker that
emits several distinct warning tones.
The D1255/D1255B Keypad is a low profile, surface-
mounted unit.
The control panel supplies all power and data
requirements for the D1255/D1255B using a simple
four-wire connection. For specific control panel
compatibility refer to Table 6 on page 6.
Refer to the Current Rating Chart for Standby Battery
Calculations provided in the following documentation,
based on which control panel connected to the
D1255/D1255B Keypad to determine if you need an
additional power supply:
• D9412G/D7412G Approved Applications Compliance
Guide (P/N: 43494) if using a D9412G or D7412G
Control Panel.
• D7212G Approved Applications Compliance Guide
(P/N: 4998138560) if using a D7212G Control
Panel.
Configurations combining supervised and unsupervised
keypads are also possible.
You can program the control panel to generate
messages to the Central Station identifying the
supervised keypad that is in trouble. If a keypad loses
communication with the control panel for more than
60 sec, the keypad buzzes and CALL FOR SERVICE
displays. The control panel transmits a serial device
trouble report to the receiver. The keypad shows SDI
FAILURE # if the Modem IIIa
2
communication format
is used or TROUBLE ZN D if the BFSK communication
format is used. For more information, refer to the
D6600 Computer Interface Manual (P/N: 4998122703).
Depending on programming in the control panel, the
D1255/D1255B permits remote control of relays and
real time clock display; adding, deleting and changing
passcodes; system tests, and more. Refer to the Keypad
and User Interface sections of the D9412G/D7412G
Program Entry Guide (P/N: 47775) for complete
programming details on keypad options. You can
initiate a variety of system commands with the touch of
two or three keys at the D1255/D1255B keypad. To
navigate through the system use the four keys near the
bottom of the keypad (Item 3 in Figure 1).
Figure 1: D1255/D1255B Layout
123
456
789
0
COMMAND
ESC
PREV
NEXT
ENT
ALL INSTANT DELAY
RESET WATCH
SPECIAL PARTIAL POLICE
BYPASS
MENU YES
Ai AREA i IS OFF
4998152977A
1
2
3
4
5
1
2
3
4
5
D1255
D1255B
1 - Alphanumeric display
2 - Siren/Speaker
3- Function Keys
4 - Command Bar
5 - Digital Keypad