Honeywell FC-SAI-1620M V1 Safe High-Density Analog Input Module

Description

Key Technical Specifications

These values come primarily from Honeywell’s Safety Manager Hardware Reference.

Signal Architecture

The FC-SAI-1620M is not a conventional direct 4–20 mA input card. The documented SAI-1620m input stage operates on 0–4.1 VDC. In a Safety Manager installation, field current signals such as 0–20 mA or 4–20 mA require the appropriate Honeywell termination/conversion hardware to produce the voltage signal expected by the SAI-1620m.

This distinction is important when replacing an existing module. A spare with the same 16-channel count is not automatically electrically equivalent if the field termination and signal-conversion architecture differs.

Product Introduction

The Honeywell FC-SAI-1620M V1 is a safe high-density analog input module for Honeywell Safety Manager systems. It provides 16 analog input channels, with each channel designed for a 0–4.1 VDC input range. The module uses a 12-bit A/D converter, specifies ±1 LSB A/D conversion inaccuracy, and has a stated module inaccuracy below 0.25%.

The FC designation is significant. Honeywell’s hardware documentation distinguishes the FS, FC, and FA versions of the SAI-1620m family. The FC version is the conformal-coated implementation, while FA is associated with the ATEX variant. This means the coating and certification configuration should be checked when selecting a replacement rather than treating all SAI-1620m variants as identical.

The module occupies 4 TE / 3 HE (4 HP, 3U) of rack space and requires 5 VDC or 24 VDC supply at 35 mA according to the Honeywell hardware reference. Listed approvals include CE, TÜV, UL, CSA, and FM.

For field instrumentation, the SAI-1620m architecture requires particular attention to signal conversion. Honeywell’s reference describes the analog input itself as a voltage input and shows the use of dedicated termination/conversion assemblies for field current signals. Therefore, an engineer replacing an FC-SAI-1620M should inspect the existing termination assembly, signal converter, wiring, and channel configuration before installing the spare.

The revision is also relevant. Honeywell’s Safety Manager certification documentation records FC-SAI-1620m CC V1.0, CC V1.1, and CC V1.2 revisions, while later releases include additional revisions. Honeywell also issued a system notification covering SAI-1620M revisions from V1.1 through V1.4 in connection with an AI-module failure notification.

For procurement, the safest identification method is therefore:

FC-SAI-1620M + exact revision + coating designation + existing Safety Manager release + termination/conversion hardware.

Do not approve a replacement based solely on “FC-” printed in a distributor listing.

FC-SAI-1620M V1

FC-SAI-1620M V1

Installation & Configuration Guide

5.1 Verify the Existing Hardware

Before removing the installed module, record:

• Complete module part number
• Revision marking
• FC/CC designation
• Safety Manager release
• Rack position
• Channel assignments
• Associated field termination assembly
• Signal converter, if installed
• Existing wiring and polarity
• Any module diagnostics or system alarms

The FC- should be replaced with the same approved hardware configuration unless the Safety Manager engineering documentation explicitly permits another revision or migration path.

5.2 Confirm the Signal Type

The module’s documented input range is 0–4.1 VDC. Do not assume that a field transmitter’s 4–20 mA output can be connected directly to the module.

Where the existing installation uses 0–20 mA or 4–20 mA instrumentation, verify the corresponding Honeywell termination/conversion arrangement. The Safety Manager hardware reference specifically identifies conversion hardware such as TSAI-1620m, TSHART-1620m, and BSAI-1620mE for appropriate signal conversion.

5.3 Power and ESD Precautions

Before module replacement:

1. Place the affected Safety Manager system in the maintenance state required by the approved site procedure.
2. Isolate power according to the applicable Safety Manager maintenance procedure.
3. Verify that the module is de-energized before removal.
4. Use appropriate ESD protection.
5. Avoid touching connector contacts or exposed circuitry.
6. Compare the replacement module’s keying and physical configuration with the installed unit.

5.4 Configuration Verification

After installation, verify:

• Module identification
• Rack and slot assignment
• Channel configuration
• Engineering-unit scaling
• Signal conversion configuration
• Input diagnostics
• Alarm limits
• Safety logic associations
• System-reported module revision

A successful physical installation does not by itself confirm that the replacement is functionally equivalent. The Safety Manager configuration and field termination architecture must also match.

5.5 Commissioning Check

After installation, perform the site’s approved functional verification. For analog channels, verify the expected input signal at the termination/conversion point and compare the Safety Manager channel value against the configured engineering range.

If a channel produces an unexpected reading, check the signal conversion path before replacing another module. A wiring or termination problem can produce symptoms that resemble an I/O module fault.

FAQ

What is the Honeywell FC- V1?

It is a Honeywell Safety Manager safe high-density analog input module with 16 analog input channels. The Honeywell hardware reference specifies a 0–4.1 VDC input range and 12-bit A/D conversion.

Is FC- a 4–20 mA input module?

Not directly. The SAI-1620m’s documented module input range is 0–4.1 VDC. Field 0–20 mA or 4–20 mA signals require the appropriate Honeywell signal-conversion/termination architecture.

How many channels does FC- provide?

It provides 16 analog input channels.

What is the difference between FS-SAI-1620m and FC-SAI-1620m?

Honeywell identifies them as separate type numbers. The FC version is the conformal-coated implementation; the FS version is the non-conformal-coated type. The FA version is associated with the ATEX configuration.

What does “CC V1” mean on an FC-?

For the FC version, Honeywell’s documentation uses the CC designation before the revision number, such as CC V1.0, CC V1.1, and CC V1.2. The CC designation corresponds to the conformal-coated configuration.

Can any FC- revision replace a V1 unit?

Do not assume this without checking the applicable Safety Manager release and certification documentation. Honeywell has documented multiple FC-SAI-1620m revisions, and the correct replacement depends on the installed system configuration.

What should be checked when purchasing FC- V1?

At minimum, verify the complete model/revision marking, FC/CC configuration, condition, packaging, Safety Manager compatibility, and associated termination/conversion hardware. For a safety-system spare, matching only the base model number is insufficient.

Is FC- suitable for a Safety Manager system?

Yes. Honeywell’s hardware reference identifies FC-SAI-1620m as a Safety Manager safe high-density analog input module, and Honeywell’s certification documentation lists the FC-SAI-1620m under Safety Manager with multiple validated revisions.