Honeywell FS-SAO-0220m Safe Analog Output Module

Honeywell FS-SAO-0220m Safe Analog Output Module

The Honeywell FS-SAO-0220m (and variant FC-SAO-0220m) is a safety-rated analog output module. It provides reliable current output signals for critical control loops in process safety systems. This module is designed to meet stringent safety standards for industrial automation.

Technical Specifications

• Brand: Honeywell
• Model: FS-SAO-0220m V1.0 / FC-SAO-0220m CCV1.0
• Product Type: Safe Analog Output Module
• Approvals: CE, TUV, UL, CSA, FM
• Safety Certification: Typically SIL 2 / SIL 3 capable
• Space Requirements: 4 TE, 3 HE (4 HP, 3U)

Power Requirements

• Module Power (Backplane): 5 Vdc, 30 mA
• Module Power (External): 24 Vdc, 65 mA
• Additional per Active Output: +30 mA from 24Vdc supply
• Dual power inputs ensure module operation and output drive capability

Output Channel Specifications

• Number of Channels: 2 Channels
• Isolation: Galvanically isolated from supply voltage (OV1 & OV2 interconnected)
• Output Type: Active or Passive, 0–20 mA / 4–20 mA selectable
• D/A Converter Resolution: 12-bit
• Off Current: < 0.05 mA

Output Drive Capability

• Loop Powering (Active Mode):
  • Maximum Loop Resistance: 600 Ω
  • Maximum Output Voltage: 30 Vdc
• External Powering (Passive Mode):
  • Maximum External Supply: 40 Vdc
  • Minimum Voltage Drop: ≤ 7.5 Vdc
• Watchdog (WDG) Input Current: 0.5 mA
• Supports both self-powered (active) and externally-powered (passive) field devices

Installation & Configuration

• Install the module in a compatible Honeywell safety system rack (e.g., Safety Manager).
• Connect the 5Vdc (backplane) and 24Vdc power supplies as required.
• Configure each channel via software for either 0-20mA or 4-20mA operation and active/passive mode.
• Connect field devices, observing the maximum loop resistance and voltage limits.

Packaging & Shipping

• Package Includes: One FS-SAO-0220m or FC-SAO-0220m analog output module.
• Includes necessary mounting hardware and documentation.
• Shipped in protective, anti-static packaging.
• International shipping via FedEx, UPS, and DHL is available.

Frequently Asked Questions

• What is the difference between FS and FC model numbers? Typically, "FS" denotes a standalone module, while "FC" may indicate a configuration or country-specific variant. Both share core technical specifications.
• How many analog outputs does it have? It provides two independent, configurable analog current output channels.
• What output signals can it generate? Each channel can be configured for the standard 0-20mA or 4-20mA analog current signal.
• What does "active or passive" output mean? An active output supplies loop power itself. A passive output requires an external power source in the loop. The module can be configured for either mode.
• What is the resolution of the output? It uses a 12-bit digital-to-analog converter, providing good resolution for control signals.