What Is the ABB V18345-1010221001 Valve Positioner?
When process control demands precise valve positioning and reliable feedback, the ABB V18345-1010221001 delivers intelligent actuation. Part of the TZIDC-120 series, this valve positioner combines a configurable indicator and operator panel with robust construction. Its aluminum varnished case offers IP 65 (NEMA 4X) protection, making it suitable for demanding industrial environments. Whether you need to mount it to linear actuators per DIN/IEC 534/NAMUR or rotary actuators per VDI/VDE 3845, this unit is ready for integral mounting.
Key Technical Specifications
The V18345-1010221001 operates on a 4...20 mA two-wire input signal with split range configuration between 20% and 100% of the nominal range. Key electrical parameters include:
- Input: Max 25 mA / 30 V, min 3.4 mA (without analog position feedback) or 3.5 mA (with analog feedback), starting from 3.8 mA
- Load voltage at 20 mA: 8.7 V DC without explosion protection; 9.7 V DC for intrinsically safe device
- Impedance at 20 mA: 435 ohms without explosion protection; 485 ohms for intrinsically safe device
- Digital input: Control voltage 24 V DC (12...30 V DC), logic levels 0...10 V DC (logical "0") and 12...30 V DC (logical "1"), current max 4 mA
- Digital output: Control circuit per DIN 19234/NAMUR, supply voltage 5...11 V DC, current 2.0 mA logical "1", configurable effective direction
- Output range: 0...6 bar (0...90 psi) with air capacity of 5.0 kg/h at 1.4 bar supply and 13 kg/h at 6 bar supply (booster on request)
- Output function: Single acting, fail freeze — air is vented from actuator or actuator is blocked on electrical power failure
- Connections: Cable thread 1/2-14 NPT; air pipe thread 1/4-18 NPT
- Option module: Plug-in module for analog position feedback (4...20 mA signal range)
Industry Applications
This intelligent positioner excels in applications requiring precise valve control and position feedback. Typical use cases include:
- Process industries: Chemical, petrochemical, and pharmaceutical plants where accurate flow, pressure, or level control is critical. The 4...20 mA input and analog feedback ensure tight process regulation.
- Power generation: Steam and water control valves benefit from the fail freeze action, which maintains the last position during power loss, preventing sudden process upsets.
- Oil and gas: The IP65 aluminum housing withstands harsh outdoor and corrosive environments, while the NPT connections simplify integration into existing piping.
Installation and Setup Guidance
Mount the V18345-1010221001 directly to linear or rotary actuators using the provided mechanical kit. For linear actuators, follow DIN/IEC 534/NAMUR mounting standards; for rotary actuators, adhere to VDI/VDE 3845. Ensure the air pipe connection uses 1/4-18 NPT and the cable connection uses 1/2-14 NPT. When wiring the 4...20 mA input, confirm the load voltage and impedance match your control system: 8.7 V DC at 20 mA without explosion protection, or 9.7 V DC for intrinsically safe devices. Configure the split range between 20% and 100% of the nominal range as needed. The digital input accepts 24 V DC (12...30 V DC) with defined logic thresholds.
Maintenance and Reliability
Routine inspection of the air supply connections and cable glands helps maintain IP65 integrity. Check the analog position feedback signal periodically to ensure accurate 4...20 mA output. The fail freeze function should be tested during commissioning to verify proper actuator behavior on power loss. Given the aluminum housing, avoid harsh chemical cleaners that could damage the varnish. Follow the manufacturer's guidelines for any internal adjustments.
Compatibility and Integration
The V18345-1010221001 integrates seamlessly with 4...20 mA control systems. The digital output per DIN 19234/NAMUR provides status feedback to PLCs or DCS. The plug-in analog position feedback module outputs a 4...20 mA signal for remote monitoring. No additional communication protocols are required for basic operation, making it a straightforward upgrade or replacement for existing positioners.
Selection Guide and Purchasing Advice
Before ordering, verify your actuator type (linear or rotary) and mounting standard. Ensure the supply pressure matches the air capacity requirements: 1.4 bar for 5.0 kg/h or 6 bar for 13 kg/h. If you need explosion protection, note that this variant (code 0) does not include it. For fail freeze action, this single-acting model is appropriate. SpareTechPLC offers the ABB V18345-1010221001 with fast shipping and expert support to help you select the right configuration.
Frequently Asked Questions
Q: What is the input signal range for the V18345-1010221001?
A: The nominal input range is 4...20 mA, with split range configuration between 20% and 100% of the nominal range. The minimum current is 3.4 mA without analog feedback or 3.5 mA with it, starting from 3.8 mA.
Q: Does this positioner include explosion protection?
A: No, this variant (code 0) is without explosion protection. For intrinsically safe applications, the load voltage at 20 mA is 9.7 V DC and impedance is 485 ohms.
Q: What does "fail freeze" mean for this model?
A: In case of electrical power failure, the V18345-1010221001 blocks the actuator in its last position (fail freeze). Air is vented from the actuator or the actuator is blocked, depending on configuration.
Q: What are the connection sizes for air and cable?
A: The cable connection uses 1/2-14 NPT thread, and the air pipe connection uses 1/4-18 NPT thread.
Q: Can I get analog position feedback?
A: Yes, this unit includes a plug-in module for analog position feedback with a 4...20 mA signal range.
