Bosch Security D8129


Octo-output module, form C relays
Provides 8 programmable relays.

Availability: In Stock

Condition: New
Brand: Bosch Security
Status: Active
SKU: 50410
Manufacturer Part #: D8129


The D8129 Octo-relay Module is suitable for applications requiring Form C relays to operate auxiliary systems or to display fire system status at remote annunciators. Building components such as HVAC, door lock releases, and stairwell pressurization can interface with the D8129 for complete system control and monitoring.

Industrial, commercial, and institutional facilities are typical installations for the D8129 module. The eight on-board relays can be programmed to activate on system alarm, system trouble, individual zone or point faults, and through remote control by authorized users.

Additional information

Weight 0.15 lbs
Dimensions 0.75 × 3.00 × 5.00 in



Production Status



  • Programmable relay functions
  • Provides eight Form C relays
  • 1 A at 30 VDC relay contact rating
  • Slide switch configuration
  • Allows remote control of relays


D8129 Octo-output module, form C relays
Bosch Security – Data Sheet – 2020
Octo-relay Module; D8129
Bosch Security – Installation and Operation Guide – 2015
Multiple D8129 Relays Sharing the Same Address; D8129
Bosch Security – Technical Service Note – 2004


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