V18345-1010421001 ABB   Valve Positioner 

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The ABB V18345‑1010421001 is a smart electro‑pneumatic valve positioner from ABB’s TZIDC series, designed to provide precise control of pneumatic actuators in industrial

process systems. It translates a 4–20 mA control signal into a proportional pneumatic output, ensuring

 accurate valve positioning and improved control performance.

Q1. What type of signal does this positioner use?

A: It typically receives a 4–20 mA two‑wire control signal, which it converts into pneumatic output to position the valve. 

Q2. What kind of actuators can it work with?

A: The positioner is suitable for both linear and rotary pneumatic actuators, using standard NAMUR

and VDI/VDE mounting interfaces. 

Q3. What happens if the control signal or power is lost?

A: It supports fail‑safe functionality, typically double acting with fail safe/freeze modes, to

hold or move the valve to a safe position on signal/power loss. 

Q4. Is this unit suitable for harsh environments?

A: Yes — the housing is designed with IP65/NEMA 4X protection, giving good

resistance to dust and water ingress in industrial settings. 

Q5. Does it support digital communication protocols?

A: Many configurations can support HART® digital communication, with

options for PROFIBUS or Fieldbus depending on variant. 

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