Honeywell FS-TSAI-1620M Safety Manager Analog Input FTA

Configured for process control and signal conditioning in Safety Manager platforms, the Honeywell FS-TSAI-1620M (FS-TSAI-1620M Field Termination Assembly) provides direct physical/electrical execution. The interface assembly conditions 16 analog field input loops, converting 0-20 mA or 4-20 mA current signals into a conditioned 0-4 VDC range for the host SAI-1620M high-density analog input module within Safety Instrumented Systems (SIS).

Suffix Breakdown & Model Matrix

• Base Assembly Designation (FS-TSAI-1620M): Honeywell Safety Manager Field Termination Assembly engineered specifically for pairing with the SAI-1620M analog input processing module.

• Channel Configuration & Reference Grouping: Features 16 analog input channels divided into 2 isolated groups of 8 channels, sharing a common 0 V reference per group.

• Loop Conversion & Protection: Converts 0-20 mA and 4-20 mA analog transmitter signals to 0-4 VDC voltage outputs, protected by individual 315 mA (5x20 mm slow-acting) inline fuses.

Hardware Specifications

Process Control & Channel-to-Channel Isolation

The FS-TSAI-1620M Field Termination Assembly delivers precise signal conversion across 16 field transmitter loops using precision resistor networks to achieve 0.10% conversion accuracy. Built-in channel grouping maintains robust channel-to-channel isolation and common-mode noise suppression across standard 4-20 mA HART loop protocol installations. The assembly incorporates inline slow-acting 315 mA field protection fuses per channel, ensuring localized overcurrent isolation to preserve active signal loops and maintain cold junction compensation (CJC) reference stability on adjacent temperature and analog interface channels.

Frequently Asked Questions

Q: What protection is provided for individual field current loops on the FS-TSAI-1620M?

A: Each channel features an individual 315 mA (5x20 mm slow-acting) fuse, protecting the internal conversion resistor network and host module against field wiring overcurrent conditions.

Q: How are the 16 analog input channels reference-grounded?

A: The 16 channels are structured into 2 distinct functional groups of 8 channels, with each 8-channel bank utilizing a shared common 0 V reference signal.

Field Installation Guidelines

• Ensure field wiring for 4-20 mA transmitter loops strictly observes polarity across the FTA terminal blocks.

• Route analog input loop lines in shielded twisted-pair cables separated from high-voltage AC conductors to preserve 0.10% signal conversion accuracy.

• When replacing channel fuses, install only 315 mA slow-acting 5x20 mm ceramic or glass fuses to maintain calibrated overcurrent threshold limits.

• Ground the cable shield at the designated FTA ground point to eliminate ground loops and reduce common-mode noise propagation to the host module.