The Honeywell FC-SAO-0220M is a high-integrity Safe Analog Output (SAO) module designed for use with the Honeywell Safety Manager and Safety Manager SC systems. This module provides two channels of current-regulated outputs, supporting both 0-20mA and 4-20mA signal ranges. Engineered for safety-critical control loops, the FC-SAO-0220M features redundant internal circuitry and extensive self-diagnostics to meet stringent Safety Integrity Level (SIL) requirements. The “CC” designation indicates that the module features a conformal coating, providing superior protection against harsh, corrosive, or humid industrial environments.
Technical Specifications
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Model Number: FC-SAO-0220M
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Part Number: 51109915-101 (Typical)
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Manufacturer: Honeywell
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System Series: Safety Manager / SMS
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Number of Channels: 2 Isolated Channels
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Output Range: 0(4) to 20 mA
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Resolution: 12-bit
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Safety Integrity Level: Suitable for SIL 3 applications
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Protection: Conformal Coating (CC) for G3 harsh environment rating
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Dimensions: 20.3 cm x 3.1 cm x 15.2 cm
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Weight: 0.45 kg
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Country of Origin: Netherlands / USA
Applications
This module is primarily utilized in Emergency Shutdown Systems (ESD) and Fire and Gas (F&G) systems where precise analog control is required for safety functions. Typical applications include the modulation of safety-critical control valves, speed setpoints for emergency fans, or regulating chemical injection pumps. Its robust design makes it a standard choice for offshore platforms, refineries, and nuclear power facilities where equipment failure could lead to significant environmental or safety hazards.
Operating Instructions
The FC-SAO-0220M should be installed into the I/O chassis of a Honeywell Safety Manager rack. Before installation, verify that the module’s keying pins match the slot configuration to prevent the insertion of an incorrect module type. The module supports “hot-swapping” in redundant configurations, but it is recommended to verify system status via the Safety Builder software before removal. Field wiring should be connected to the corresponding terminal compression assembly; ensure that the loop impedance remains within the specified limits (typically 0 to 600 ohms) to maintain current regulation. After hardware installation, configure the output range and safety shutdown states within the Safety Builder environment.
Frequently Asked Questions
Q: What does the “M” signify in the model number? A: The “M” suffix generally denotes that the module is a “Modified” or “Modernized” version of the original SAO-0220 design, often featuring updated components for better thermal efficiency and longer lifecycle support while maintaining full functional compatibility.
Q: Can this module be used in a non-redundant setup? A: Yes, the FC-SAO-0220M can operate in a single (non-redundant) mode. However, for SIL 3 safety loops, Honeywell typically recommends a redundant configuration to ensure that a single module failure does not result in a loss of the safety function.
Q: How does the module handle a diagnostic failure? A: If the internal self-tests detect a fault in the output circuitry or a discrepancy between the commanded and actual current, the module will automatically transition the affected channel to its pre-defined “Safe State” (usually 0mA) and trigger a system-wide hardware alarm.
Recommended Similar Models
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Honeywell FC-SAI-1620M (16-Channel Safe Analog Input Module)
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Honeywell FC-SDI-1624 (16-Channel Safe Digital Input Module)
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Honeywell FC-SDO-0824 (8-Channel Safe Digital Output Module)
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Honeywell FC-TSAI-1620M (Analog Input Termination Assembly)
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Honeywell FC-PSU-2405 (Safety Manager Power Supply Unit)
