Description

Honeywell FC-SDO-0824M Safe Digital Output Module

The Honeywell FC-SDO-0824M, also cataloged as the FC-SDO-0824 Safe Digital Output Module, operates as a dedicated hardware component for fail-safe 24 VDC signal execution within Honeywell Safety Manager and Fail Safe Controller platforms.

Hardware Specifications

Parameter	Specification
Model	FC-SDO-0824M / FC-SDO-0824 CC
Brand	Honeywell
Origin	USA
Weight	Not specified in available documentation
Dimensions	4 TE, 3 HE (4 HP, 3U)
Operating Temp	-20 deg C to +60 deg C
Power Consumption	5 VDC: 25 mA; 24 VDC internal: 25 mA; 24 VDC field supply: 70 mA without output load
Module Type	Safe Digital Output Module
Safety Capability	SIL 2 / SIL 3 capable according to IEC 61508
Output Channels	8 safety digital output channels
Channel Arrangement	2 groups of 4 channels with independent SMOD capability
Output Voltage	24 VDC solid-state sourcing output
Maximum Channel Current	550 mA per channel
Channel Power Capacity	13 W maximum
Lamp Load Capacity	120 mA, 2.9 W maximum
On-State Voltage Drop	Less than 2.0 VDC at 500 mA
Off-State Leakage Current	Less than 0.1 mA
Load Capacitance	1 uF maximum
Short Circuit Protection	Electronic current limiting and short-circuit protection
Output Protection	Integrated suppression diode for inductive loads
Environmental Protection	Conformal coating available on M / CC variants

Honeywell Safety Manager Fail-Safe Output Execution

The FC-SDO-0824M provides solid-state 24 VDC output switching for safety-related field devices. It controls external actuators, relays, solenoids, and indication devices through eight independent output channels.

Furthermore, the module divides outputs into two isolated groups of four channels. Each group includes a Secondary Means of De-energizing (SMOD), allowing the controller and watchdog circuits to remove output power during detected faults.

The module performs continuous self-diagnostic routines during configured test intervals. These diagnostics verify output shutdown capability, suppression diode condition, and channel interaction behavior without interrupting normal process operation.

Frequently Asked Questions

Q: Does the FC-SDO-0824M support inductive field loads?
A: Yes. Each output channel includes an integrated suppression diode that manages inductive voltage spikes from devices such as solenoids and relays.

Q: How does the module achieve fail-safe output shutdown?
A: The module uses independent SMOD circuits for two output groups, allowing the processor and watchdog functions to force outputs into a safe de-energized state.

Q: Can the output channels operate continuously at maximum current?
A: The module supports up to 550 mA per channel, with current derating required at elevated operating temperatures.

Field Installation Guidelines

• Install the FC-SDO-0824M in the specified Honeywell Safety Manager or FSC I/O chassis position.
• Verify module key coding before insertion to prevent installation in an incompatible chassis slot.
• Connect 24 VDC field wiring according to the approved terminal assignment documentation.
• Separate output wiring from high-voltage power cables to reduce electrical interference.
• Use appropriate grounding methods for cabinet shields and cable screens according to site electrical standards.
• Confirm field actuator ratings before connection to ensure compatibility with the 550 mA channel current limitation.
• Perform diagnostic verification after installation to confirm output switching and fail-safe de-energization functions.

Specifications

• Brand: Honeywell

Advantages

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