Honeywell FS-TSAI-1620M Safe Analog Input Field Termination Assembly
The Honeywell FS-TSAI-1620M is a 16-channel safe analog input Field Termination Assembly (FTA) engineered for Honeywell Safety Manager and Fail Safe Controller (FSC) systems. Operating on a 24 VDC nominal power supply, the module acquires 0/4–20 mA signals from transmitters and converts them into low-voltage signals for high-density safety analog input cards. As a non-conformal coated assembly, it serves as the physical interface between field wiring and system control electronics in Safety Instrumented Systems (SIS).
Signal Conditioning and Transmitter Power Distribution
The FS-TSAI-1620M routes 16 analog channels arranged into two isolated groups of 8 channels with shared 0 V reference lines. Each channel incorporates a high-precision 250 Ω resistor to perform linear direct conversion of 0–20 mA field current loop signals into 0–4 VDC levels suited for processing by system I/O modules like the SAI-1620M. The assembly provides integrated power distribution and voltage-current limiting to pass-through transmitter connections, protecting field loops in Class I, Division 2 hazardous locations.
Mounting and Field Termination Interface
Designed for standard DIN rail mounting (TS32/TS35), the module features screw terminal connections accepting field conductors up to 2.5 mm² (AWG 14). Dedicated ground terminals per channel allow proper cable shield grounding to reduce common-mode noise and maintain signal accuracy across sensitive safety loops.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | FS-TSAI-1620M |
| Brand | Honeywell |
| Product Type | Safe Analog Input Field Termination Assembly |
| Series | Safety Manager / Fail Safe Controller (FSC) |
| Number of Channels | 16 channels (2 groups of 8) |
| Nominal Supply Voltage | 24 VDC (24 to 30 VDC external range) |
| Input Signal Range | 0 to 20 mA / 4 to 20 mA DC |
| Input Resistance | 250 Ω (±1%) |
| Output Signal to I/O Module | 0 to 4 VDC |
| Conversion Accuracy | ±0.1% |
| Operating Temperature | -40 to +70 deg C |
| Dimensions | 210 x 70 x 60 mm |
| Mounting Style | DIN rail (TS32 / TS35 x 7.5) |
| Weight | 0.99 lbs |
Frequently Asked Questions
Q: What is the main difference between the FS-TSAI-1620M and FC-TSAI-1620M modules? A: The FS-TSAI-1620M is the standard non-conformal coated version, whereas the FC-TSAI-1620M includes a conformal coating designed for extra protection in harsh or corrosive environments.
Q: How does the FS-TSAI-1620M handle field transmitter power distribution? A: The module distributes external 24 VDC power to passive field transmitters with built-in current and voltage limiting, ensuring compliance with non-incendive field circuit requirements in Class I, Division 2 hazardous areas.
Honeywell FS-TSAI-1620M Safe Analog Input Field Termination Assembly
Honeywell FS-TSAI-1620M Safe Analog Input Field Termination Assembly
The Honeywell FS-TSAI-1620M is a 16-channel safe analog input Field Termination Assembly (FTA) engineered for Honeywell Safety Manager and Fail Safe Controller (FSC) systems. Operating on a 24 VDC nominal power supply, the module acquires 0/4–20 mA signals from transmitters and converts them into low-voltage signals for high-density safety analog input cards. As a non-conformal coated assembly, it serves as the physical interface between field wiring and system control electronics in Safety Instrumented Systems (SIS).
Signal Conditioning and Transmitter Power Distribution
The FS-TSAI-1620M routes 16 analog channels arranged into two isolated groups of 8 channels with shared 0 V reference lines. Each channel incorporates a high-precision 250 Ω resistor to perform linear direct conversion of 0–20 mA field current loop signals into 0–4 VDC levels suited for processing by system I/O modules like the SAI-1620M. The assembly provides integrated power distribution and voltage-current limiting to pass-through transmitter connections, protecting field loops in Class I, Division 2 hazardous locations.
Mounting and Field Termination Interface
Designed for standard DIN rail mounting (TS32/TS35), the module features screw terminal connections accepting field conductors up to 2.5 mm² (AWG 14). Dedicated ground terminals per channel allow proper cable shield grounding to reduce common-mode noise and maintain signal accuracy across sensitive safety loops.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | FS-TSAI-1620M |
| Brand | Honeywell |
| Product Type | Safe Analog Input Field Termination Assembly |
| Series | Safety Manager / Fail Safe Controller (FSC) |
| Number of Channels | 16 channels (2 groups of 8) |
| Nominal Supply Voltage | 24 VDC (24 to 30 VDC external range) |
| Input Signal Range | 0 to 20 mA / 4 to 20 mA DC |
| Input Resistance | 250 Ω (±1%) |
| Output Signal to I/O Module | 0 to 4 VDC |
| Conversion Accuracy | ±0.1% |
| Operating Temperature | -40 to +70 deg C |
| Dimensions | 210 x 70 x 60 mm |
| Mounting Style | DIN rail (TS32 / TS35 x 7.5) |
| Weight | 0.99 lbs |
Frequently Asked Questions
Q: What is the main difference between the FS-TSAI-1620M and FC-TSAI-1620M modules? A: The FS-TSAI-1620M is the standard non-conformal coated version, whereas the FC-TSAI-1620M includes a conformal coating designed for extra protection in harsh or corrosive environments.
Q: How does the FS-TSAI-1620M handle field transmitter power distribution? A: The module distributes external 24 VDC power to passive field transmitters with built-in current and voltage limiting, ensuring compliance with non-incendive field circuit requirements in Class I, Division 2 hazardous areas.
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