TC-TBNH Honeywell 20-Pin Terminal Block

Product Description

The TC-TBNH (Part Number: TC-TBNH) is a 20-pin terminal block connector engineered for Honeywell Experion PKS Series C I/O modules. This high-density interface provides a secure and reliable termination point for field wiring, bridging signals from transmitters, actuators, and discrete devices to the control electronics. Designed for industrial durability, the TC-TBNH ensures long-term electrical integrity and mechanical stability in harsh process environments.

Its robust screw-cage clamp design facilitates gas-tight connections and allows field wiring to remain undisturbed during module servicing or replacement. The terminal block is optimized for plug-in installation on Series C Input Output Termination Assemblies (IOTAs), simplifying both installation and maintenance.

Technical Specifications

Application Scenarios

• Terminating 4–20 mA analog transmitter loops on Series C input modules

• Managing discrete digital signals in petrochemical and process control systems

• Providing modular wiring access for Fieldbus Interface Modules (FIMs)

• Facilitating maintenance and replacement of worn or damaged terminal blocks without disrupting field wiring

Frequently Asked Questions

Can the TC-TBNH accept two wires per terminal?
Yes. Each pin supports two wires between 16–22 AWG, allowing daisy-chaining or signal bridging directly at the terminal.

Is this terminal block compatible with all Series C IOTAs?
No. The TC-TBNH is compatible only with IOTAs featuring a 20-pin header format. Always verify the pin count of your IOTA before installation.