Edwards 3-SDDC2-E Fire Alarm Dual Signature Driver Controller

The Edwards 3-SDDC2-E is a dual Signature driver controller (loop controller) module for the Edwards EST4 life safety control platform, EN54 version. It provides the intelligent interface between the 4-CPU-E and Edwards Signature Series detectors and modules, and supports two Signature data circuits.

It comes with two 3-SDC1 Signature device cards and occupies one rail space in the control cabinet. Its own microprocessor coordinates and interprets information from the Signature devices, and a standalone mode keeps alarms reaching the panel even if the 4-CPU-E or the loop controller itself fails.

Key features

• Two Signature data circuits (two 3-SDC1 cards supplied)
• Dedicated microprocessor with fully digital communication to Signature devices
• Distributed intelligence: detection algorithms and environmental compensation run in the devices
• Standalone survival modes if the 4-CPU-E or the loop controller fails
• Class B, Class A and Class X wiring supported
• Loop distances over 3,300 m (11,000 ft) are possible
• Power and communications taken directly from the panel rail
• Removable field wiring terminals

Technical specifications

• Model: 3-SDDC2-E (EN54 version)
• Type: dual Signature driver controller, local rail module
• Signature circuits: 2
• Capacity per 3-SDC1 card: 125 detectors and 125 modules
• Rail spaces: 1
• Wiring: Class B, Class A or Class X
• System: EST4
• Data sheet reference: E85010-0129