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White rectangular security keypad with smooth capacitive touch surface and no visible buttons

BOSCH

BOSCH B921C Capacitive Keypad SDI2

SKU CH-2T10-ENYES MPN B921C

SDI2 bus capacitive touch keypad with three emergency keys, four inputs and adjustable volume and brightness

  • Capacitive touch surface cleans easily and resists wear
  • SDI2 bus compatibility integrates directly with supported control panels
  • Three programmable emergency keys give instant access to critical functions
  • Four configurable inputs expand monitoring options
  • Two-line display shows system messages for all areas at a glance

Capacitive SDI2 keypad

The B921C is a security keypad that connects to a control panel via an SDI2 bus. Its capacitive touch keys replace mechanical buttons with a smooth surface that is easy to clean and suits modern interiors. The unit includes three programmable emergency keys and four inputs for expanded functionality. Two-line system messages display status information for all areas.

Installers needing SDI2 compatibility

This keypad suits installations that require an SDI2 bus device with capacitive keys and integrated inputs. It is not for systems that lack SDI2 support or that rely on mechanical-button keypads. Buyers who need a different bus protocol or a keypad without programmable emergency keys should consider other options.

SDI2 bus interface

The keypad communicates with the control panel exclusively through the SDI2 bus. This single interface determines whether the device will integrate with the existing security system. Verify that the panel supports SDI2 before purchase.

Highlights

  • Capacitive touch surface cleans easily and resists wear
  • SDI2 bus compatibility integrates directly with supported control panels
  • Three programmable emergency keys give instant access to critical functions
  • Four configurable inputs expand monitoring options
  • Two-line display shows system messages for all areas at a glance

Specifications

No published specifications for this item yet.

Questions about this item

How many capacitive keys can be programmed as emergency triggers?

The keypad provides three programmable emergency keys that can be assigned to specific alarm functions.

What is the power draw once the backlight and capacitive sensors run continuously?

The unit draws its operating current from the SDI2 bus, so no separate power supply is needed for all-day operation.

Which control-panel bus must already be installed for this keypad to communicate?

It requires an existing SDI2-compatible control panel; the keypad connects directly to that bus with the supplied EOL resistors.

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