Product Overview
When a valve positioner fails in a critical process, production stops and safety risks rise. The ABB V18345-1010121001 TZIDC Electro-Pneumatic Positioner provides reliable, intelligent control to keep your plant running. Designed for linear and rotary actuators, this unit combines robust construction with easy configuration.
Technical Specifications Breakdown
Input and Output Signals
- Input: 4...20 mA, two-wire with connector plug for LKS adapter
- Output signal: 4...20 mA nominal range, two-wire technology
- Digital input: Control voltage 0...5 V DC (logical '0'), 11...30 V DC (logical '1')
- Digital output: Supply voltage 5...11 V DC per DIN 19234/NAMUR
Pneumatic Performance
- Supply pressure: 1.4...6 bar (20...90 psi)
- Air consumption: < 0.03 kg/h / 0.015 scfm (independent of supply pressure)
- Output/safe position: Single acting, fail safe on electrical power failure
Environmental Durability
- Ambient temperature: -40 °C to +85 °C for operation, storage, and transport
- Relative humidity: Up to 95% (annual average) with condensation permissible during operation
- Housing: Aluminum, IP 65 / NEMA 4X protection, black RAL 9005 varnish
Physical Attributes
- Weight: 1.7 kg
- Electrical connections: Screw terminals max 2.5 mm² for analog signal, cable entry 1/2-14 NPT
- Pneumatic connections: Threads G 1/4 or 1/4-18 NPT
Industry Applications
Chemical and Petrochemical Plants
In corrosive environments, the IP 65 aluminum housing resists moisture and dust. The failsafe single acting output ensures the valve moves to a safe position during power loss, preventing hazardous leaks.
Power Generation
For steam and water control loops, the 4-20 mA input integrates directly with DCS or PLC systems. The analog position feedback module (4...20 mA) gives operators real-time valve position data for precise modulation.
Water and Wastewater Treatment
With wide ambient temperature tolerance (-40 °C to +85 °C), this positioner works reliably in outdoor or unheated installations. The low air consumption (< 0.03 kg/h) reduces operating costs over time.
Installation and 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 1/2-14 NPT cable entry for electrical connections and 1/4-18 NPT air pipe threads. Ensure screw terminals are not subjected to strain. The two-wire 4-20 mA loop powers the device and carries the setpoint signal.
Maintenance and Reliability
From a maintenance engineer's perspective, the TZIDC design simplifies service. The plug-in analog feedback module can be replaced without rewiring. The stove-hardened epoxy varnish resists corrosion in harsh atmospheres. Regularly inspect the air supply filter and verify supply pressure stays within 1.4...6 bar. Check cable glands for tightness to maintain IP 65 integrity.
Compatibility and Integration
This positioner works with any 4-20 mA control system. The digital input accepts 0...5 V DC or 11...30 V DC signals for remote switching. The digital output follows NAMUR (DIN 19234) standards, compatible with most PLC and DCS discrete input modules. The analog feedback provides a direct 4-20 mA signal to the host system.
Selection Guide and Purchasing Advice
Before ordering the ABB V18345-1010121001, verify your actuator mounting interface (linear or rotary) and pneumatic connection size (G 1/4 or 1/4-18 NPT). Confirm that your control system supplies a 4-20 mA loop. SpareTechPLC stocks this model and can advise on current lifecycle status and availability. Contact us to confirm compatibility with your specific valve assembly.
Frequently Asked Questions
Q: What is the supply pressure range for the V18345-1010121001?
A: The supply pressure must be between 1.4 and 6 bar (20 to 90 psi).
Q: Does this positioner include explosion protection?
A: No, this variant (code 0) does not include explosion protection. Verify your area classification before installation.
Q: What type of position feedback does the module provide?
A: The plug-in module delivers analog position feedback with a 4...20 mA signal range.
Q: Can I use this positioner in high humidity environments?
A: Yes, the IP 65 housing allows 95% relative humidity with condensation permissible during operation.
Q: What is the failsafe action on power loss?
A: The output is single acting and failsafe, moving the valve to a predefined safe position when electrical power is lost.
