What Is the ABB V18345-1021120001 TZIDC Electro-Pneumatic Positioner?
When valve positioning accuracy and reliability are critical, the ABB V18345-1021120001 TZIDC Electro-Pneumatic Positioner delivers intelligent, configurable performance. Part of the TZIDC family, this unit features an integrated indicator and operator panel for easy setup and monitoring. It accepts a 4-20mA input signal and includes an LKS adapter with connector plug plus an FSK module for HART communication, enabling seamless integration into modern process control systems. The rugged aluminum case provides IP 65 (NEMA 4X) protection, making it suitable for harsh environments.
Technical Specifications Breakdown
The V18345-1021120001 is designed for double-acting actuators with a fail-freeze safe position. Key specifications include:
- Input/Communication: 4-20mA with LKS adapter and FSK module for HART protocol.
- Explosion Protection: FM/CSA approved for hazardous locations.
- Electrical Connections: 1/2-14 NPT threads; screw terminals accept up to 2.5 mm² for analog signals.
- Pneumatic Connections: 1/4-18 NPT threads.
- Ambient Temperature Range: -40 °C to +85 °C for operation, storage, and transport.
- Relative Humidity: Up to 95% (annual average) with condensation permissible during operation.
- Enclosure: Aluminum case, IP 65 / NEMA 4X, electrostatic dipped epoxy varnish, black RAL 9005.
These parameters ensure reliable performance in extreme temperatures and humid conditions, common in oil and gas, chemical, and power generation facilities.
Industry Applications
In oil refineries and chemical plants, precise valve positioning is essential for process safety and efficiency. The V18345-1021120001 excels in double-acting actuator applications where fail-freeze behavior is required—maintaining the last position upon signal loss. Its HART communication allows remote configuration and diagnostics, reducing manual intervention. The wide temperature tolerance (-40 °C to +85 °C) makes it suitable for outdoor installations in cold climates or near heat sources.
Installation & Setup Guidance
Mount the positioner securely on the actuator using the provided 1/4-18 NPT air connections. Ensure electrical wiring through the 1/2-14 NPT cable entry meets local codes—use cable glands for proper sealing. Connect the 4-20mA signal to the screw terminals (max 2.5 mm²). Do not expose terminals to strain. After installation, configure the unit via the operator panel or HART communicator. Verify the fail-freeze function by simulating a signal loss.
Maintenance & Reliability
Regular inspection of the pneumatic connections and electrical terminals is recommended to prevent leaks or loose wires. The IP65 aluminum case protects internal components from dust and water jets, reducing maintenance frequency. Periodically check the ambient temperature stays within -40 °C to +85 °C. The epoxy varnish coating resists corrosion in humid environments. Following these steps extends service life and minimizes unplanned downtime.
Selection Guide & Purchasing Advice
Before ordering, confirm your actuator type (double-acting) and required safe position (fail freeze). Verify the electrical and pneumatic connection sizes match your system. The V18345-1021120001 does not include analog or mechanical feedback—ensure your application does not require these options. SpareTechPLC offers this genuine ABB unit with fast shipping and expert support. Contact us to verify current lifecycle status and availability.
Frequently Asked Questions
Q: What communication protocol does the V18345-1021120001 support?
A: It supports HART communication via the integrated FSK module and LKS adapter.
Q: What is the safe position of this positioner?
A: It is configured for double-acting, fail freeze—meaning the valve stays in its last position if the input signal is lost.
Q: What is the operating temperature range?
A: The device operates from -40 °C to +85 °C for operation, storage, and transport.
Q: Does this model include mechanical feedback?
A: No, the V18345-1021120001 comes without mechanical feedback (option 00).
Q: What enclosure protection does it offer?
A: The aluminum case provides IP 65 (NEMA 4X) protection against dust and water jets.
