Honeywell TK-IDK161 C200 AC Input Module

Description

The TK-IDK161 is a high-density, isolated hardware component configured as a 16-point AC Input Module within the Honeywell C200 and Experion system platforms. This module functions as an electrical interface that monitors alternating current discrete signals from field devices such as limit switches, pushbuttons, and auxiliary contacts, converting them into digital state logic for the process controller. It features 16 individually isolated channels designed for a nominal input of 120 VAC, complying with IEC Type 1+ input compatibility specifications. Galvanic isolation barriers are engineered between individual channels and from user-to-system lines to eliminate ground loop interference and shield the supervisory control backplane from high-voltage field spikes.

Features

• 16 individually isolated input circuits providing distinct channel-to-channel galvanic separation.
• IEC Type 1+ input compatibility parameters for stable industrial signal sensing.
• Programmable input filter delay times allowing tailored debounce tuning.
• Standard physical form factor optimized for standard C200 controller chassis slots.
• High transient voltage protection verified through strict factory isolation testing.

Applications

• Monitoring of discrete machinery states and safety interlocking switches.
• Interface management for 120 VAC field control circuits and pushbuttons.
• Distributed Control Systems (DCS) sequential control logic tracking.
• Subsystem signaling inside chemical processing, refining, and utility generation facilities.

Technical Specifications

Connections/Interfaces

Installation Guidelines

Grounding and Shielding

Verify that the host equipment chassis is bonded cleanly to the primary plant instrument grounding network using a low-impedance copper wire. Field digital signal wiring shields, if implemented for noise mitigation, must terminate exclusively at an external ground bar away from the control modules.

Handling and ESD Protection

The internal semiconductor circuits are sensitive to electrostatic discharge (ESD). Field maintenance personnel must wear an approved, snug-fitting static-dissipative wrist strap connected to a verified ground point prior to unboxing or placing the module into its chassis slot.

Insertion and Backplane Integration

Align the circuit board edges with the molded plastic track guides of the local C200 rack. Slide the module completely inward until the rear pins match and fully engage the backplane connector. Fasten the integrated front locking screws to protect the assembly from continuous industrial panel vibration.

Field Wiring Alignment

All 120 VAC discrete signal conductors must be terminated securely into the compatible TC-TBCH 36-position terminal block. Keep AC voltage input lines isolated within dedicated panel ducts separated from low-voltage analog cables or communications lines to suppress electromagnetic cross-talk.

FAQ

What is the core function of this module within the control framework?

It monitors external 120 VAC on/off discrete signals from field devices and sends their status to the central C200 controller.

How many isolated channels are housed on a single unit?

The module features 16 distinct input points, and each channel is individually isolated from the others.

What specific terminal block is required to land field cables on this unit?

This module requires the model TC-TBCH 36-position terminal block assembly to complete field terminations.

What is the maximum permissible voltage for an off-state input condition?

 The input circuit is specified to recognize an off-state loop condition provided the voltage does not exceed 20 V.

Can the signal delay or filter configuration be adjusted by engineers?

Yes, the off-to-on filter delays (1 ms and 2 ms) and on-to-off filter delays (9 ms and 18 ms) are software-programmable.

What level of electrical isolation is provided between individual channels?

The galvanic separation between channels is factory tested and verified to withstand 2546 VDC for a duration of 1 second.

What is the net unboxed weight of the standalone hardware assembly?

The individual hardware module has an unboxed net weight of exactly 0.2 kg.

How much load current does this unit require from the 5 VDC logic backplane?

 The nominal steady-state current consumption from the 5 VDC logic rail is specified at 0.125 A.

What happens to the input current during initial activation or short-circuit transients?

The hardware exhibits a peak short/inrush current parameter of 250 mA, which decays to less than 37% within 22 ms.

Is this hardware compatible with international IEC input standards?

Yes, the input tracking circuits match the performance criteria established under the IEC Type 1+ standard.