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Silent Knight 5128 Slave Communicator
Silent Knight 5128 Slave Communicator

Silent Knight 5128 Slave Communicator

Manufacturer:Silent Knight
Manufacturer Part#:5128
Our Part#:5128
Stock Status: Call for Availability
Retail Price:$644.42
Your Savings:$230.15(36%)
Your Price:$414.27


Silent Knight







Feature 5


Note: The Silent Knight 5128 is designed to mount within the control panel. For a stand-alone communicator, use the 5129, which has it's own enclosure and is designed to mount near the FACP.


  • UL listed as a slave fire communicator for connection to UL listed 24 VDC local FACPs
  • Four fully supervised input channels programmable as voltage input active high or low or as a contact closure input
  • Dual phone line interface and line fault monitors
  • Automatic 24 hour test
  • Reports in most major communication formats
  • Compact size of 5128 allows mounting in most local FACPs
  • Easy to install and service
  • Program the 5128 to report FACP AC trouble immediately or delay reporting from 6 to 12 hours
  • Set up direct FACP AC monitoring from the FACP’s main power input with the 5129
  • Onboard nonsilencing audible alarm
  • Program remotely, view current status, and change the 24 hour test time with a PC running DOS and Silent Knight 5541 software (5530) modem also required)


The 5128 and 5129 (5128/29) are four channel slave fire communicatorsdesigned to monitor UL listed local fire alarm systems. The 5128/29 are acost-effective answer to most fire communicator applications and areeasy to install and service.

Electrical Specifications

  • Primary AC: 120 VAC, 60 Hz, 45 mA
  • Primary DC: 18 40 VDC
  • Total DC Load: 84 [email protected] 24 VDC max
  • Standby Current with Annunciator:
    143 mA @ 24 VDC max
  • Standby Current without Annunciator:
    84 [email protected] 24 VDC max
  • Alarm Current with Annunciator:
    227 [email protected] 24 VDC max
  • Alarm Current without Annunciator:
    154 mA @ 24 VDC max
  • Channel Inputs: 18 30 VDC
  • Active High Current:
    15 mA max
  • Dry Contact Current: 4.7 VDC, 6 mA max
  • AC Monitor Input (5129 only): AC trouble output from FACP or 120 VAC
  • Watchdog Response: 50 sec. max

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