Honeywell FC-SAO-0220M V1.2 Safe Analog Output Module

Configured for precise analog actuation and loop signal processing in Safety Manager systems, the Honeywell FC-SAO-0220M V1.2 (FC-SAO-0220M Safe Analog Output Module) provides direct physical/electrical execution.

Hardware Specifications

4-20 mA HART Loop Protocol & Channel-to-Channel Isolation

Engineered for safety instrumented control loops, the module utilizes internal 12-bit D/A converters to generate calibrated 0-20 mA or 4-20 mA output signals across 2 independent channels. Built-in channel-to-channel isolation and galvanic barrier circuits prevent ground potential differences from corrupting active loop currents driving field positioning elements. The module maintains signal accuracy up to a maximum loop resistance of 600 Ohm, enabling direct integration with standard 4-20 mA HART field devices while executing SIL2 safety functions under IEC 61508 parameters.

Frequently Asked Questions

Q: What is the total current draw of the module with both analog output channels driven at maximum capacity?

A: The module draws a base power supply current of 65 mA from the 24 VDC bus, plus an additional 30 mA for each active channel. With both channels operating at full 20 mA span, total module current consumption reaches 125 mA.

Q: What is the maximum external load resistance tolerated by the output channels?

A: Each isolated output channel supports a maximum field loop resistance of 600 Ohm while delivering the full 0-20 mA or 4-20 mA current range without driving the output stage into voltage saturation.

Field Installation Guidelines

• Ensure external 24 VDC power supplies and active field loops are fully de-energized prior to seating the module or landing terminal connections.
• Secure field wiring using twisted-shielded pair cables dedicated to 4-20 mA analog signals to minimize high-frequency electromagnetic noise pickup.
• Ground cable shields at a single point on the enclosure grounding bar to prevent circulating ground currents across signal channels.
• Route analog signal conductors in separate, grounded metal conduits distinct from high-voltage AC power cables.
• Install the module within an IP54 or better enclosure to maintain environmental protection across the full -40 to +70 deg C operating temperature range.