Honeywell FC-TSDI-1624 Digital Input Field Termination Assembly

The Honeywell FC-TSDI-1624 is identified as a digital input field termination assembly for industrial control system I/O wiring. Its function is associated with the field-side termination of discrete input signals between external devices and the control system interface. Channel capacity, terminal arrangement, electrical ratings, and compatibility with specific input modules require confirmation against documentation for this exact model.

Technical Specifications

Field Wiring and Signal Interface

The FC-TSDI-1624 provides the connection between the SICC-0001/Lx system interconnection cable and external field wiring. The cable connects the assembly's system interconnection connector to the associated SDI-1624 digital input modules. The field side uses screw terminals for discrete signal wiring.

Input Circuit Protection

Each input channel includes a positive temperature coefficient (PTC) resistor in the 24 VDC supply path. This current-limiting arrangement helps prevent a short circuit from pulling down the shared supply for all 16 channels when a field wire is shorted to 0 V. The assembly provides the field termination and protection interface; it does not replace the associated input modules that process the signals.

Installation and Wiring

• Mount the assembly on a compatible TS32 or TS35 x 7.5 DIN rail.
• Use field conductors no larger than 2.5 mm2 (AWG 14).
• Strip 7 mm of insulation from each conductor and tighten terminals to 0.5 Nm.
• Verify the system interconnection cable and associated SDI-1624 module configuration before wiring or replacement.

Frequently Asked Questions

Q: How many digital input channels does the FC-TSDI-1624 support?

A: It provides 16 digital input field termination channels for 24 VDC circuits. The associated SDI-1624 input modules perform the control-system input processing.

Q: What is the difference between FC-TSDI-1624 and FS-TSDI-1624?

A: The documented FC variant is conformal coated, whereas the FS variant is identified as non-conformal coated. Confirm the exact part number and required coating before ordering a replacement.

Q: Can the FC-TSDI-1624 be used as a standalone digital input module?

A: No. It is a field termination assembly that interfaces external wiring with the associated SDI-1624 modules through the SICC-0001/Lx cable. It does not independently perform the input processing or safety logic.