ABB TK850V007 | I/O Termination Unit, OEM Stock

Product Introduction

The ABB TK850V007 is a termination unit (TU) for the S800 I/O family, serving as the interface between field wiring and S800 I/O modules. This termination unit provides the physical mounting base for a single I/O module, along with the terminal blocks for field device connections and the Modulebus connectors for communication back to the controller. Typical applications include distributed I/O for AC800M, AC500, and other ABB control systems across process industries, manufacturing, and infrastructure.

The S800 I/O platform is ABB’s standard distributed I/O solution, known for its modularity, high availability options, and compact footprint. The TK850V007 is part of the TK850 series of termination units, which are designed for standard applications requiring a balance of channel density, diagnostic capability, and simplicity. For system integrators, this TU provides a clean wiring interface with clearly marked terminals, integrated Modulebus connections, and mechanical keying to prevent incorrect module insertion.

Key Technical Specifications

Key Selling Points & Differentiators

• Direct Field Wiring Interface: Provides clearly labeled screw terminals for field device connections, eliminating the need for separate marshalling panels in smaller installations.

• Mechanical Coding: Built-in coding pins prevent insertion of incompatible I/O modules, reducing installation errors and potential damage to modules or field devices.

• Integrated Modulebus: Modulebus connections are integrated into the termination unit. Daisy-chaining between multiple TUs is straightforward, with standard connectors for incoming and outgoing communication.

• Compact Footprint: Narrow 102 mm width allows dense I/O concentration in space-constrained cabinets, particularly valuable for machine-mounted I/O and retrofit applications.

• OEM Authenticity: Each unit undergoes visual inspection for ABB branding, serial number traceability, and factory packaging verification. We do not sell counterfeit or third-party clones.

Frequently Asked Questions (FAQ)

Q: Which S800 I/O modules are compatible with the TK850V007?
The TK850V007 supports a wide range of S800 I/O modules, including:

• Digital input modules (DI810, DI811, DI818, etc.)

• Digital output modules (DO810, DO820, DO840, etc.)

• Analog input modules (AI810, AI820, AI830, AI835, etc.)

• Analog output modules (AO810, AO815, AO820, etc.)

This termination unit is designed for standard I/O modules requiring field power distribution. It does not support safety I/O modules (DI880, DO880, etc.) or modules requiring redundant Modulebus.

Q: What is the difference between the TK850V007 and the TK850V010?
The primary differences are in field power distribution and module support. The TK850V007 provides a standard termination interface for a single I/O module with grouped field power terminals. The TK850V010 offers more flexible field power grouping and is often used with modules that require separate power zones or higher channel counts. For most standard applications, the TK850V007 is the correct choice. Confirm with your system documentation to ensure compatibility.

Q: Does this termination unit support redundant Modulebus?
No. The TK850V007 supports standard (non-redundant) Modulebus. For redundant Modulebus applications, you need a termination unit from the TK851 or TK852 series, such as the TK851V010 or TK852V010. Redundant TUs include additional Modulebus connectors and internal circuitry for dual communication paths.

Q: Do I need to configure anything on the termination unit?
No. The TK850V007 is a passive termination unit with no DIP switches or user-configurable settings. Addressing and configuration are handled through the I/O module and controller. The TU simply provides mechanical mounting, field wiring connections, and Modulebus pass-through.

Q: Can I hot-swap the I/O module on this termination unit?
Yes. The S800 I/O system supports hot-swap of I/O modules on the TK850V007. You can remove and replace the I/O module while the system remains powered. The Modulebus communication remains active, and the controller will recognize the new module when inserted. However, field wiring remains connected and energized during the swap—exercise appropriate electrical safety precautions.

Q: What field wire sizes are compatible with the TK850V007 terminals?
The screw terminals accept wire sizes from 0.2 mm² to 2.5 mm² (24 AWG to 14 AWG). For stranded wire, we recommend using ferrule terminals to ensure reliable connections and prevent stray strands from causing shorts. Torque terminals to 0.5 to 0.6 Nm for proper contact.

Q: What testing do you perform before shipping?
For new factory-sealed units, we do not break the seal to maintain OEM warranty eligibility. Our QC process includes visual inspection of packaging integrity, verification of the TK850V007 part number, and anti-counterfeit checks. For units where the seal has been broken (typically for used or customer-requested testing), we perform continuity verification, terminal block inspection, and mounting dimension confirmation. A test report is available upon request.