The Edwards SIGI-OSDI is an intelligent multi-criteria optical smoke detector with an integrated isolator, from the Signature Series for Edwards EST4 (EN54) analogue addressable fire alarm systems. The built-in isolator helps keep the rest of the Signature data loop working in the event of a wiring short. It is listed in Edwards' EN54 version EST4 submittal guide (data sheet E85001-0712).
Key features
- Multi-criteria optical smoke sensor
- Integrated line fault isolator
- On-board sensors and algorithms compare readings over time with known fire signatures, helping to reject nuisance alarms
- Automatic dirty detector warning and sensitivity measurement reporting
- Signature Series intelligent device with on-board microprocessor (distributed intelligence)
- Self-diagnostics and history log stored in non-volatile memory
- Automatic device mapping by the Signature loop controller
- Fast, stable digital communication - shielded or twisted wiring is not required
Technical specifications
- Detection: multi-criteria optical smoke
- Isolator: integrated
- Mounting: Signature Series detector bases, e.g. SIGA-SB/SB4 standard, SIGA-IB/IB4 isolator or SIGA-RB/RB4 relay base
- Sounder base option: SIGA-AB4GI audible base (for Signature Series smoke detectors)
- Data sheet reference: E85001-0712
- Signature loop controller: 3-SSDC2-E (single) or 3-SDDC2-E (dual) on the EST4 panel
