Honeywell FC-SDO-0824 Safe Digital Output Module

8-Channel Safe Digital Outputs for Critical Control

The Honeywell FC-SDO-0824 and FS-SDO-0824 deliver eight 24V DC output channels. Each channel provides up to 550 mA for driving solenoids, lamps, and inductive loads. 

Safety Architecture

• Eight solid-state outputs with short-circuit proof design, grouped into two isolated groups of four
• Secondary means of de-energizing (SMOD) lets watchdog and processor cut power independently
• Built-in suppression diodes protect against voltage spikes from inductive loads
• Periodic diagnostic testing verifies de-energizing ability and checks for crosstalk

Technical Specifications

• Brand: Honeywell
• Models: FC-SDO-0824, FS-SDO-0824
• Output: 24V DC solid-state source, 550 mA per channel max
• Voltage drop: < 2.0 VDC at 500 mA
• Off current: < 0.1 mA
• Lamp load: 120 mA (2.9 W)
• Max load capacitance: 1 µF

Power Requirements

• 5V DC logic: 25 mA
• 24V DC internal: 25 mA
• 24V DC external: 70 mA (plus load current)
• Watchdog input current: 8 mA

Certifications & Physical

• CE, TÜV, UL, CSA, FM approved
• Format: 4 TE, 3 HE (4 HP, 3U)
• Operating temperature: 0°C to +60°C

Installation & Packaging

• Plug-in module with 24-pin DIN 41612 connector
• Includes module, front connector, quick-start guide
• Shipping: FedEx, UPS, DHL worldwide

FAQ

• Q: Can I mix inductive and resistive loads?
  A: Yes. Each output has a suppression diode. Keep total group current below 2.2 A.
• Q: What is the difference between FC-SDO-0824 and FS-SDO-0824?
  A: Both are electrically identical. FC-SDO-0824 includes conformal coating for harsh environments.
• Q: How does SMOD improve safety?
  A: It provides an independent hardware path to cut output power, meeting SIL2/3 requirements even if the main processor fails.