Honeywell FC-SAO-0220M | Safe Analog Output Module

Product Overview

The Honeywell FC-SAO-0220M functions as a high-integrity analog output module for the Safety Manager and FSC (Fail-Safe Controller) safety systems. This module provides two independent and galvanically isolated current output channels for safety-critical control applications . Moreover, the FC-SAO-0220M drives final control elements such as control valves, actuators, and positioners with precise 4-20 mA signals.

Technical Specifications

The FC-SAO-0220M operates with a 12-bit D/A converter to ensure accurate signal conversion . This module supports both active (loop-powered) and passive (externally powered) output configurations for flexible field integration . Furthermore, the unit offers comprehensive diagnostic coverage, including watchdog monitoring and open-circuit detection.

Parameter	Specification
Manufacturer	Honeywell
Output Channels	2 galvanically isolated
Output Signal	0-20 mA / 4-20 mA (configurable)
D/A Converter Resolution	12-bit
Off-State Current	<0.05 mA
Max Loop Resistance (Active)	600 Ω
Max Output Voltage (Active)	30 V DC
External Powering (Passive)	Up to 40 V DC
Watchdog Input Current	0.5 mA
Power Requirements	5 V DC @ 30 mA; 24 V DC @ 65 mA + 30 mA per output
Safety Certification	TÜV SIL 2 / SIL 3 (IEC 61508)
Space Requirements	4 TE, 3 HE (4 HP, 3U)
Dimensions	2 × 18.9 × 12.8 cm
Weight	0.16 kg
Operating Temperature	–20°C to +85°C
Approvals	CE, TÜV, UL, CSA, FM

Key Design Features

The FC-SAO-0220M includes extensive internal diagnostics that continuously monitor output integrity . This module automatically drives outputs to a predefined safe state (off current < 0.05 mA) upon detecting any system fault or communication failure . Additionally, the unit supports redundant configurations for high-availability applications, enabling bumpless switchover between primary and secondary modules . The module’s compact footprint and front-panel LED indicators facilitate straightforward installation and rapid troubleshooting .

Application and Integration

The FC-SAO-0220M integrates seamlessly with Honeywell Safety Manager and Experion PKS platforms in safety instrumented systems (SIS) . System engineers commonly deploy this module in emergency shutdown (ESD) systems, burner management systems (BMS), and fire & gas (F&G) detection installations . Consequently, it plays a vital role in oil and gas, chemical processing, and power generation facilities where precise analog control and fail-safe operation are paramount. The module pairs with the TSAOH-0220M Field Termination Assembly via the SICC-0001/Lx interconnection cable .