Product Description
The SAI-1620m analog input module provides sixteen safety-rated inputs (0–4 V) plus one external-voltage read-back channel (0–4 V).
All sixteen inputs meet SIL 3 / IEC 61508 requirements and share a single, galvanically-isolated 0 V reference.
Field signals must be scaled to 0–4 V before reaching the module.
Two conversion options are available:
1. Use a field termination assembly-TSAI-1620m, TSHART-1620m, TSGAS-1624 or TSFIRE-1624.
2. Plug an analog conversion card, BSAI-1620mE, into the programming connector (P.) on the rear of the I/O backplane inside the 19-inch chassis.
Direct connection of thermocouples, PT-100 or other non-current sensors is not supported; they must first be converted to 0(4)–20 mA by a suitable transmitter, then routed through either a TSAI-1620m or BSAI-1620mE module.

Our Contact Info
| Sales Person | Felicia |
| Mobile | +86 18030132586 |
| cn@mooreplc.com | |
| +86 18030132586 | |
| +86 18030132586 |
Product Parameters
| Category | Item | Specification |
|---|---|---|
| General | Type numbers | FS-SAI-1620m V1.1FC-SAI-1620m CC V1.1FA-SAI-1620m CA V1.1 |
| Approvals | CE, TÜV, UL, CSA, FM | |
| Space requirements | 4 TE, 3 HE (4 HP, 3U) | |
| Power | 5 Vdc consumption | 35 mA |
| 24 Vdc consumption | 35 mA | |
| Input | Number of channels | 16 |
| Input range | 0 – 4.1 V | |
| Input resistance | > 1 MΩ | |
| A/D converter resolution | 12-bit | |
| A/D converter inaccuracy | ± 1 LSB | |
| Module inaccuracy | < 0.25 % | |
| Absolute maximum signal | ± 36 Vdc | |
| Channel crosstalk | > 60 dB | |
| External Voltage Read-back | Read-back range | 0 – 4.1 V |
| Read-back input resistance | ≈ 1 MΩ | |
| Key Coding | Module code holes | A5, C25 |
| Chassis code large pins | A5, C25 |
Advantages
The SAI-1620m analog input module is engineered for high-integrity safety systems requiring reliable low-voltage signal acquisition. It offers sixteen SIL 3–rated analog inputs in the 0–4 V range, plus an external voltage read-back channel for enhanced diagnostics. A 12-bit A/D converter with low module inaccuracy (<0.25%) ensures precise and repeatable measurements. All channels share a galvanically isolated 0 V reference, improving noise immunity and system stability. Flexible signal conversion options using field termination assemblies or plug-in conversion cards simplify system design while maintaining strict functional safety compliance.
Applications
The SAI-1620m is widely used in safety-critical monitoring applications where accurate analog signal input is essential. Typical uses include reading process values from pressure, flow, level, and gas transmitters that provide 0–4 V or converted 4–20 mA signals. It is commonly deployed in Safety Manager and Safety Manager A.R.T. systems across industries such as oil and gas, chemical processing, power generation, and fire and gas detection. By supporting external signal conversion modules, the SAI-1620m integrates seamlessly with standard industrial transmitters while ensuring SIL 3 compliance and dependable plant protection.
Related Honeywell items
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|---|---|---|---|
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| PSU-UNI11011U | 110 Vdc | 1.1 A (50 W) | Universal 110 V DIN-rail |
| 1200 S 24 P067 | 24 Vdc | 5 A (120 W) | 1200-series slim |
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| RUSPSU-S | 24 Vdc | 10 A (240 W) | Stand-alone version |
| PSU-UNI2412 | 24 Vdc | 12 A (288 W) | Universal high-current |
| PSUTA-0001 | 24 Vdc | 5 A (120 W) | TA-style chassis plug-in |
FAQ
01.What type of signals does the Honeywell FC-SAI-1620M V1.5 accept?
02.Can 4–20 mA field signals be connected directly to the module?
03.Which conversion options are supported for signal scaling?
04.Does the module support direct connection of temperature sensors?
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