iO-SDC1

The Edwards IO-SDC1 is a single loop controller card for iO Series fire alarm control panels, adding one Signature SLC loop supporting up to 250 device addresses (125 detectors + 125 modules).
It can replace the standard 64-point loop on iO64 panels or expand iO1000 capacity in 250-point increments, supporting both Class A and Class B wiring with automatic device mapping and Signature protocol communication.
Key Specifications
Feature
Specification
Display
N/A (controller card)
Device Capacity
250 addresses (125 detectors + 125 modules)
Loop Type
1 Class B / Class A (Style Z) configurable
Operating Voltage
24 VDC
Standby Current
55 mA
Alarm Current
80 mA (not including 2-wire smoke)
Communication
Signature Data Circuit (20.6 V peak-to-peak max)
Standard Functions
Auto device mapping, Ground fault detection
Mounting
iO Series expansion slot
Terminal Rating
12-18 AWG (0.75-2.5 mm²)
Max Isolators/Loop
64
Operating Temp
0°C–49°C (32°F–120°F, 0-93% RH)