Honeywell FC-SAI-1620M V1 | 16-Channel Safety Analog Input Module

Description

Core Product Summary (Brand / Model / Key Attributes)

Honeywell FC-SAI-1620M V1 is a conformal-coated, high-density Safety Analog Input module for the Honeywell Safety Manager system. It provides 16 safety-related analog input channels with a 0–4.1 V input range and one external voltage readback input.

Each channel uses 12-bit A/D conversion and shares an isolated analog 0 V common. The module requires 5 VDC and 24 VDC supplies, each at 35 mA, and occupies 4 TE × 3 HE of rack space. Field current signals must be converted to the module’s voltage input range; the FC-TSAI-1620M field termination assembly converts 0(4)–20 mA field signals to the required SAI-1620M input level. The module is documented with CE, TÜV, UL, CSA, and FM approvals and is intended for safety applications up to SIL 3 under IEC 61508.

Key Technical Specifications

Detailed Product Overview

The Honeywell FC-SAI-1620M V1 is a 16-channel analog input module used in Safety Manager installations to acquire voltage signals from field-interface hardware. Its input range is 0–4.1 V, and it also provides an external voltage readback input in the same range. The module’s 12-bit A/D conversion and documented module inaccuracy of less than 0.25% define its measurement performance for the configured input range.

The module’s 16 channels share an isolated analog 0 V common. This common-reference arrangement is a key wiring and signal-integrity consideration: channel grouping, grounding, shielding, and common-mode conditions must be designed around the shared analog reference. The documented input resistance is greater than 1 MΩ, the maximum load capacitance is 100 nF, and the absolute maximum input is ±36 VDC.

The FC-SAI-1620M does not directly accept 0–20 mA or 4–20 mA field current signals. Honeywell documentation specifies that field current signals must first be converted to a voltage level suitable for the SAI-1620M module. The FC-TSAI-1620M field termination assembly performs this conversion, translating 0(4)–20 mA field signals into the voltage range required by the analog input module. Signals such as thermocouples or PT100 sensors also require appropriate signal conversion before they can be used with this module.

The module requires both 5 VDC and 24 VDC supplies, each specified at 35 mA. Its conformal-coated construction distinguishes the FC version from the non-coated FS-SAI-1620M variant. In a Safety Manager architecture, the module is used with the appropriate FTA and system interconnect cabling, and its SIL 3 classification supports use in safety applications up to SIL 3 under IEC 61508.

FC-SAI-1620M V1

FC-SAI-1620M V1

Engineering Selection Highlights

• The FC-SAI-1620M V1 provides 16 safety-related analog inputs, making channel count and the required safety classification the primary selection criteria.
• Its 0–4.1 V input range means direct 0–20 mA or 4–20 mA field signals require an FC-TSAI-1620M FTA or equivalent documented signal conversion.
• The module’s 12-bit conversion and less-than-0.25% module inaccuracy should be compared with the accuracy requirement of the measured process variable.
• Its isolated analog 0 V common is shared by all 16 channels, so grounding, shielding, and channel grouping must be designed to preserve signal integrity.
• The module requires both 5 VDC and 24 VDC supplies at 35 mA each, which affects Safety Manager power-distribution calculations.
• Its 4 TE × 3 HE footprint should be included in Safety Manager chassis space planning.
• The conformal-coated FC version should be selected where the installed system specification calls for coated electronics; the non-coated FS-SAI-1620M is the corresponding uncoated variant.

Dimensions, Mounting & Connection Notes

System Compatibility & Integration Requirements

FAQ

What is the Honeywell FC-SAI-1620M V1?
It is a Honeywell Safety Manager conformal-coated, high-density Safety Analog Input module with 16 safety-related analog input channels.

How many analog inputs does the FC-SAI-1620M provide?
It provides 16 analog input channels, plus one external voltage readback input.

What input signal range does it accept?
The module accepts 0–4.1 V analog input signals and provides a 0–4.1 V external voltage readback input.

Can it connect directly to 4–20 mA transmitters?
No. Field current signals must be converted to the module’s voltage input range; the FC-TSAI-1620M FTA converts 0(4)–20 mA signals for use with the SAI-1620M module.

What resolution and accuracy does it provide?
It uses a 12-bit A/D converter with ±1 LSB converter inaccuracy and a documented module inaccuracy of less than 0.25%.

What power supplies does it require?
It requires 5 VDC at 35 mA and 24 VDC at 35 mA.

What rack space does it occupy?
It occupies 4 TE × 3 HE, equivalent to 4 HP × 3U.

Which approvals are documented?
The module is documented with CE, TÜV, UL, CSA, and FM approvals.

Verification & Troubleshooting Notes

• Confirm the complete type designation, FC-SAI-1620M V1, before matching the module to a Safety Manager I/O configuration or spare-parts record.
• Verify that field current loops are connected through the appropriate FC-TSAI-1620M FTA or documented signal-conversion arrangement; direct 0–20 mA or 4–20 mA connection is outside the module’s specified input range.
• For inaccurate or unstable readings, check the analog 0 V common, cable shielding, grounding, channel grouping, and possible common-mode or crosstalk conditions.
• Confirm that input voltage remains within the 0–4.1 V range and does not approach the ±36 VDC absolute maximum input limit.
• Verify both the 5 VDC and 24 VDC module supplies and their current loading when the module or multiple channels fail to operate correctly.
• For thermocouple or RTD measurements, confirm that the required dedicated converter is installed and correctly configured; the SAI-1620M does not accept those sensor signals directly.
• Use Safety Manager diagnostics and Safety Builder configuration data to distinguish channel faults from FTA wiring, power-distribution, or signal-conversion issues.
• Maintain the module’s conformal coating, connectors, and FTA cabling during service; do not bypass safety-related signal conversion, grounding, or diagnostic functions.