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D1255RB/D1256RB/D1257RB | Installation Instructions | 1.0 Introduction
4 Bosch Security Systems, Inc. | 8/06 | F01U011791B
1.0 Introduction
Before installing the D1255RB, D1256RB, or
D1257RB, you should be familiar with the operation
and installation guide and the program entry guide for
the control panel you are using. Before proceeding
with the installation instructions in this manual, be sure
that you are familiar with the programming
recommendations in the Guide to UL 864 9th Edition
Programming Requirements section of the Introduction in
the D9412GV2/D7412GV2 Program Entry Guide
(P/N F01U003636).
2.0 Overview
2.1 D1255RB/D1256RB/D1257RB
Features
The D1255RB and D1256RB Fire Keypads and the
D1257RB Fire Alarm Annunciator are 4-wire serial
devices used with the following Bosch Security Systems
control panels with firmware version 7.04 or higher:
• D9412GV2
• D7412GV2
• D7212GV2
The D7212GV2 is not approved for
commercial fire applications.
Each of these control panels supervises up to eight
keypads or annunciators. You can connect a total of 32
keypads or annunciators to the system. The number of
supervised keypads or annunciators, number of areas,
and the available power affect the total number of
keypads or annunciators you can connect to the
system.
2.1.1 D1255RB
The D1255RB has number keys (0 to 9) and function
or menu keys, including [COMMAND] and [ENTER].
The D1255RB can be used as a system controller and
an annunciator.
Because a passcode is required to use the keypad, it is
usually installed in building entrances and areas with
unrestricted access. Near an exterior door in a hotel or
in a business lobby is an ideal mounting location,
allowing a responding agency or persons evacuating
the building to identify quickly the type and location of
the emergency from outside without being in danger.
2.1.2 D1256RB
The D1256RB provides annunciation and system
control. Four function keys on the D1256RB provide
quick execution of alarm silencing, trouble silencing,
annunciator display reset, and sensor reset functions.
The D1256RB should be mounted in a
secure area or locked inside an approved
clear plastic enclosure.
2.1.3 D1257RB
The D1257RB provides remote annunciation without
system control capability. It can be mounted in public
access locations.
Two keys on the D1257RB allow the user to select
forward or backward through a list of system events.
2.2 Description
2.2.1 Display
The D1255RB, D1256RB and D1257RB use a
16-character display with custom programmable text.
The custom text programmed at the control panel
appears in the vacuum fluorescent display (VFD).
Refer to Figure 1, Item 1.
The keypads and annunciator show the latest status
conditions of the fire system using words, numbers, and
symbols. When an alarm occurs, a message remains in
the display until the user acknowledges the event at a
keypad or annunciator. When a series of events
affecting the system occurs, each event appears in
order of its priority.
2.2.2 Audible Tones
The D1255RB, D1256RB and D1257RB have a built-
in speaker that produces several distinct warning tones.
To change the speaker volume, adjust the
potentiometer (Figure 1, Item 3). Turn the potentiometer
clockwise to increase and counterclockwise to decrease
the volume.
You cannot connect external annunciation
devices to the D1255RB, D1256RB, and
D1257RB.
• Fire Signal – Pulsed, high pitched bell tone when
the system is in alarm
• Invalid Key Buzz – Flat buzz tone when an
invalid key, or sequence of keys, is pressed
• Keypad Encoding Tone – Muted beep tone as
each key is pressed to indicate that the entry has
been accepted. To disable the keypad encoding
tone, refer to Section 2.2.3 Switch Settings.