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  Bosch DS-D185 Fire Alarm Direct Connection
Bosch DS-D185 Fire Alarm Direct Connection


 

Our Price : $106.00


Product Code: DS-D185

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Description
 
The D185 Reverse Polarity Signaling Module communicates system conditions (alarm, trouble, and supervisory) from a compatible control panel to a monitoring station by reversing or interrupting the polarity of a steady signal it sends over leased telephone company (telco) lines. The module operates over one or two pairs of lines.

Functions:
Operation on Telco Phone Lines:
Operation on a Single Pair of Telco Lines If a single pair of telco lines is connected, the module signals an alarm condition by reversing the polarity of the telco output. It responds to a trouble condition by interrupting the current of the telco output. If the module receives an alarm signal when it is in a trouble condition (current interrupted), it restores current and reverses polarity. The alarm output has a 20 sec delay ( five seconds).

Operation on Two Pair of Telco Lines:
If a second pair of telco lines is connected, the module signals a supervisory condition by reversing the polarity of the supervisory output. The current received at the monitoring station is adjusted by signal adjusters on the module board, one for the alarm and trouble output and one for the supervisory output.

Test Mode:
The switch-activated test mode indicates a trouble condition at the control panel and a trouble condition at the monitoring station. The test mode is shown on the module board by a light-emitting diode (LED).

Specifications:

Environment: Indoor, dry
Features
  • UL Listed for NFPA 72 remote station applications
  • Adjustable alarm and supervisory output current
  • Alarm activation delay
  • System test mode with LED indicator
  • Easy installation

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