Description

Honeywell FS-SDO-0824 Safe Digital Output Module

The Honeywell FS-SDO-0824, also cataloged as the SDO-0824 Safe Digital Output Module, operates as a dedicated hardware component for fail-safe output switching within Honeywell Safety Manager and Fail Safe Control (FSC) system platforms.

Hardware Specifications

Parameter	Specification
Model	FS-SDO-0824 / SDO-0824
Brand	Honeywell
Product Type	Safe Digital Output Modules
Dimensions	4 TE, 3 HE rack space
Operating Temp	Derates to 350 mA per channel at 70 deg C
Power Consumption	5 VDC supply: 25 mA; 24 VDC internal supply: 25 mA; 24 VDC external supply: 70 mA without load
Safety Integrity Level	Up to SIL 3 according to IEC 61508
Number of Channels	8 isolated output channels
Output Type	Solid-state high-side sourcing output
Nominal Output Voltage	24 VDC
Maximum Continuous Current	550 mA per channel
Maximum Lamp Load	120 mA, 2.9 W
Maximum Load Capacitance	1 uF
Voltage Drop	Less than 2.0 VDC at 500 mA
Off-State Leakage Current	Less than 0.1 mA
Watchdog Input Current	8 mA
Certifications	CE, TUV, UL, CSA, FM
Coating Type	Non-conformal coated FS version

Fail-Safe Output Switching and Isolation

The FS-SDO-0824 provides eight isolated solid-state sourcing channels for direct control of external electrical loads. Each output channel incorporates short-circuit protection and diagnostic monitoring functions to supervise connected field circuits.

Additionally, the module separates outputs into two groups of four channels. Each group includes Secondary Means of De-energization (SMOD) hardware, which supports fail-safe output interruption during safety system demand conditions.

The module performs continuous diagnostic checks to detect output faults, open circuits, short circuits, and internal hardware abnormalities. Therefore, the safety controller can evaluate output circuit status during operation.

Frequently Asked Questions

Q: Does the FS-SDO-0824 support fail-safe output operation for SIL 3 applications?
A: Yes. The module is designed for fail-safe digital output control and supports applications up to SIL 3 according to IEC 61508 when applied within the approved Honeywell safety system architecture.

Q: What type of loads can the FS-SDO-0824 control?
A: The module supports resistive, inductive, and lamp loads, including devices such as solenoids, relays, contactors, and indicators within specified electrical limits.

Q: Does the module provide electrical isolation between output channels?
A: Yes. The FS-SDO-0824 provides isolated output channels with integrated protection and diagnostic functions for individual field circuits.

Field Installation Guidelines

• Install the module only in compatible Honeywell Safety Manager or FSC rack assemblies.
• Verify the module position and connector alignment before inserting the hardware into the rack.
• Connect field wiring according to the approved Honeywell wiring documentation.
• Separate output wiring from high-voltage switching conductors to reduce electrical interference.
• Use appropriate grounding and shielding practices for connected field devices.
• Confirm load polarity and external supply connections before applying system power.
• Inspect terminal connections periodically to maintain correct electrical contact.

Specifications

• Brand: Honeywell

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems