ABB V18345-1010121001 TZIDC Electro-Pneumatic Positioner for Precise Valve Control

Reliable Valve Positioning for Harsh Environments

When a chemical plant experiences valve drift at extreme temperatures, the ABB V18345-1010121001 TZIDC Electro-Pneumatic Positioner delivers consistent, accurate positioning. This intelligent positioner handles ambient temperatures from -40 °C to +85 °C, ensuring stable operation even in outdoor or unheated installations. Its aluminum housing with IP 65 (NEMA 4X) protection resists dust and water jets, making it suitable for washdown areas and dusty environments.

Technical Specifications Breakdown

The V18345-1010121001 operates on a 4...20 mA two-wire input signal, providing straightforward integration with existing control systems. It features a plug-in module for analog position feedback (4...20 mA), enabling remote monitoring of valve position. The digital input accepts control voltages: logical switching state "0" at 0...5 V DC and state "1" at 11...30 V DC. The digital output (NAMUR) supplies 5...11 V DC. Pneumatic connections use 1/4-18 NPT threads, while electrical connections use 1/2-14 NPT cable entries. The unit weighs only 1.7 kg, simplifying installation.

Industry Applications

This positioner excels in oil and gas, chemical processing, and power generation. For a refinery control valve, the fail-safe single-acting output ensures the valve moves to a safe position upon power loss. The wide supply pressure range of 1.4...6 bar (20...90 psi) accommodates various plant air systems. Air consumption remains below 0.03 kg/h (0.015 scfm), independent of supply pressure, reducing operational costs.

Installation & Setup Guidance

Mount the V18345-1010121001 directly to linear actuators per DIN/IEC 534/NAMUR or to rotary actuators per VDI/VDE 3845. Use the provided 1/2-14 NPT cable entries for electrical wiring and 1/4-18 NPT connections for air piping. Ensure screw terminals are not strained: use max. 2.5 mm² for analog signal and max. 1.0 mm² for options. The configurable operator panel allows on-site adjustment without additional tools.

Maintenance & Reliability

The electrostatic dipping varnish with epoxy resin protects the aluminum case against corrosion. With no moving parts in the control electronics, the TZIDC series requires minimal maintenance. Periodic inspection of pneumatic connections and cable glands ensures long-term reliability. The 95% relative humidity tolerance (with closed housing and air supply on) makes it suitable for humid environments.

Selection Guide & Purchasing Advice

Before ordering, verify your actuator type (linear or rotary) and mounting requirements. The V18345-1010121001 includes analog feedback; if digital feedback is needed, order the optional mechanical kit separately. BluePLC Industrial stocks this ABB positioner and can confirm current lifecycle status and availability. Contact our team for assistance with compatible accessories or replacement units.