Edwards EST 3-SDDC1

Dual Signature Driver Controller

Condition: New
Brand: Edwards, EST
Status: Obsolete
SKU: 37873
Manufacturer Part #: 3-SDDC1
Replacement: 3-SDDC2


The 3-SSDC1 and 3-SDDC1 Signature Driver Controller modules provide an intelligent interface between the 3-CPU3 module and Signature Series devices. Each module contains its own microprocessor used to coordinate, process and interpret information received from and sent to Signature devices. Power and communications is received directly from the control panel rail assembly. The 3-SSDC1 Single Signature Driver Controller module supports one Signature Data circuit, while the 3-SDDC1 Signature Dual Driver Controller module supports two Signature circuits. Both modules occupy one rail space in the fire alarm control cabinet and provide removable field wiring terminals to aid installation.

Innovative design gives the 3-SSDC1/3-SDDC1 and Signature devices truly “distributed intelligence”. Signature detectors and modules have their own on-board microprocessor communicating with the loop controller in a fully digital communication format. This increases the accuracy of the information coming to and from the loop controller by reducing the effects of capacitance and noise.

3-SDDC1Dual Signature Driver Controller. Comes with two 3-SDC1s. Mounts to Local Rail.

Additional information

Weight 1 lbs
Dimensions 5 × 5 × 10 in



Production Status





  • One or two circuit versions
  • Dedicated microprocessor control
  • Full digital communication
  • Specialized communication protocol
    – Less sensitive to cable characteristics
    – Utilize existing wiring in most applications
  • Loop alarm in under 750 milliseconds
  • Device location supervision
    – Unexpected additional device addresses
    – Missing device addresses
    – Switched device locations
    – Programmed device parameters
  • Automatic nonvolatile as-built mapping
    – Stores “actual” and “expected” device data
    – Stores physical connection sequence including “T” taps
  • Automatic day/night sensitivity
  • Supports up to 250 intelligent Signature detectors and 250 Intelligent Signature Modules
  • Up to five 3-SDDC1s per node
    – Total of 10 Signature circuits
  • Removable field wiring terminal blocks
  • Multiple survival modes — stand alone
  • Fully backward compatible with 3-SSDC and 3-SDDC
  • Supports the full line of Signature II devices, including carbon monixide detection


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Signature Driver Controller Modules; 3-SSDC1, 3-SDDC1, 3-SDC1


Edwards - Data Sheet