Data Sheet
Intrusion Alarm Systems | B921C Two-line Capacitive Keypad with Inputs (SDI2)
B921C Two-line Capacitive Keypad with
Inputs (SDI2)
www.boschsecurity.com
u 2-line LCD display with up to 32 character point,
user, and area names
u Capacitive touch keys clean easily and are more
resistant to wear than traditional mechanical
buttons
u Situation sensitive on-screen help makes system
operation simple and easy
u Highly visible on (arm)/alarm, ready to turn on
(arm), power, trouble, and gas alarm indicators
u Four inputs provide simple, lower-cost point
expansion
The B921C keypad is an SDI2 bus compatible device.
The keypad features capacitive touch keys, instead of
the mechanical buttons found on most keypads. With a
smooth, sleek surface, the keypad is easy to clean, and
fits with any modern decor. The keypad has user
adjustable options such as volume and brightness. The
keypad has three programmable emergency keys, and
four inputs. The keypad also shows two-line system
messages for all areas.
System overview
• For commercial use, install the keypad in building
entrances and areas with unrestricted access.
Mounting a keypad near exterior doors in hotel or
business lobbies allows people to identify the type
and location of the emergency.
• For residential use, install the keypad near the front
and rear entrances to the home. Install additional
keypads in a kitchen or in a bedroom.
• Use multiple keypads in a large building with many
separate areas of security. Program multiple keypads
to control multiple areas.
• Audible tones from the keypad sounder alert
personnel to fire events and assist fire fighters in
locating the keypad.
Functions
LCD display
The keypad uses words, numbers, and symbols to
show the status of the security system. When several
events occur, the keypad shows each event in order of
priority.
Keys
Each keypad has 10 number keys, 7 function keys, and
6 navigation keys. When pressed, keys turn on keypad
backlighting and emit the keypress tone (short beep).
The function keys include programmable function keys
and keys to initiate arming and bypassing with one
keypress.
Audible tones
The keypad has a built-in speaker that produces
several distinct warning tones. The tones are
differentiated so that the user can recognize an event