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Honeywell FS-TSAI-1620M Safe Analog Input Field Termination Assembly

The Honeywell FS-TSAI-1620M, also cataloged as the FC-TSAI-1620M Safe Analog Input Field Termination Assembly, operates as a dedicated hardware component for converting field transmitter current signals into analog input voltage signals within Honeywell Safety Manager systems.

Hardware Specifications

Parameter	Specification
Model	FS-TSAI-1620M / FC-TSAI-1620M
Brand	Honeywell
Product Type	Safe Analog Input Field Termination Assembly
System Compatibility	Honeywell Safety Manager SIS
Origin	USA
Weight	0.3kg
Dimensions	210 x 70 x 60 mm (L x W x H)
Mounting Rail	DIN EN TS32 / TS35 x 7.5
Used Rail Length	211 mm
Operating Temp	Not specified
Power Consumption	30 V DC external, 3 mA (without input loop loads)
Approvals	CE, TUV, UL, CSA, FM
Input Channels	16 channels, arranged as 2 groups of 8 channels with common 0 V reference
Input Signal Range	0-20 mA and 4-20 mA current loop signals
Maximum Input Current	0-25 mA
Input Resistance	250 ohm +/- 1%
Output Signal to SAI-1620M	0-4 V DC
Output Accuracy	0.10%
Passive Transmitter Supply Output Resistance	270 ohm +/- 5%
Igniting Current Per Channel	Less than 120 mA at 30 V DC
Fuse Rating	315 mA
Fuse Size	5 x 20 mm
Fuse Voltage Rating	125 V AC
Maximum Fuse Output Current	220 mA
Terminal Type	Screw terminals
Maximum Wire Diameter	2.5 mm2 (AWG 14)
Wire Strip Length	7 mm
Terminal Tightening Torque	0.5 Nm
Field Circuit Classification	Nonincendive field circuits, Class 1 Division 2
Hydrogen Group A and B Loop Inductance	Maximum 6 mH
Hydrogen Group A and B Loop Capacitance	Maximum 0.25 uF
Non-Hydrogen Group C and D Loop Inductance	Maximum 20 mH
Non-Hydrogen Group C and D Loop Capacitance	Maximum 5 uF

4-20 mA Process Signal Interface and Isolation Characteristics

The Honeywell FS-TSAI-1620M interfaces field-mounted analog transmitters with the SAI-1620M Safe High-Density Analog Input Module. Moreover, the assembly accepts 0-20 mA and 4-20 mA current signals and converts them into a proportional 0-4 V DC signal for module processing.

The unit provides sixteen analog input channels divided into two eight-channel groups with a common 0 V reference. Therefore, the signal conversion path maintains consistent analog scaling between field devices and the safety input module.

In addition, the module supports transmitter loop applications through a passive transmitter supply output with a 270 ohm output resistance. The design includes channel protection through individual 315 mA fuses and supports nonincendive field circuits for Class 1 Division 2 installation environments.

For Honeywell process control interfaces, the analog loop architecture follows standard 4-20 mA instrumentation practices. Furthermore, engineers must verify transmitter wiring, loop resistance, and grounding arrangements before commissioning the SIS input circuit.

Frequently Asked Questions

Q: How many analog input channels does the FS-TSAI-1620M provide?
A: The FS-TSAI-1620M provides sixteen analog input channels arranged as two groups of eight channels with a common 0 V reference.

Q: What signal conversion does the field termination assembly perform?
A: The assembly converts incoming 0-20 mA or 4-20 mA current loop signals into 0-4 V DC output signals for the SAI-1620M Safe High-Density Analog Input Module.

Q: What type of field wiring terminals does the module use?
A: The module uses screw terminals supporting wires up to 2.5 mm2 (AWG 14) with a 7 mm strip length and 0.5 Nm tightening torque.

Field Installation Guidelines

Install the FS-TSAI-1620M on compatible TS32 or TS35 x 7.5 DIN EN rails and verify mechanical fixation before wiring field circuits.

Use separate routing paths for analog signal cables and high-current power conductors to reduce electrical interference. Moreover, connect cable shields according to the plant grounding standard and avoid creating unintended ground loops.

Verify transmitter polarity, current loop continuity, and external 30 V DC supply wiring before applying power. Ensure field circuits remain within the specified nonincendive Class 1 Division 2 electrical limits.

Confirm terminal tightening conditions and inspect all field connections before integrating the module with the Honeywell Safety Manager input system.

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