Product Overview
When precise valve positioning is critical for process control, the ABB V18345-2010521001 TZIDC Electro-Pneumatic Positioner delivers reliable performance. This positioner is part of the TZIDC series, designed for linear or rotary actuators. Its double-acting, fail freeze output ensures the valve stays in its last position during an electrical power failure, preventing sudden process changes.
Key Specifications
The V18345-2010521001 features an input signal of 4...20 mA, two-wire, with a connector plug for LKS adapter. The case is made of aluminium, varnished, with a mechanical position indicator, suitable for mounting to linear actuators per DIN/IEC 534/NAMUR or rotary actuators per VDI/VDE 3845. Cable connections use 1/2-14 NPT threads, and air pipe connections use 1/4-18 NPT threads. A plug-in module provides analog position feedback with a 4...20 mA signal. The unit weighs 1.7 kg.
Industry Applications
This positioner excels in industries requiring reliable valve control, such as oil and gas, chemical processing, and power generation. For example, in a chemical plant, the fail freeze feature maintains valve position during a power interruption, avoiding hazardous material release. The double-acting output suits applications needing both opening and closing force.
Installation & Setup Guidance
Mount the positioner directly to the actuator using the provided NAMUR or VDI/VDE 3845 interface. Connect the air supply to the 1/4-18 NPT port and electrical wiring to the 1/2-14 NPT cable entry. Commissioning is straightforward: press a single front panel button to start the Autoadjust function, which automatically adapts device parameters for linear or rotary actuators. The 2-line LC display shows current position, setpoint, and alarms.
Maintenance & Reliability
Regularly inspect the positioner for air leaks and ensure the electrical connections remain tight. The TZIDC program monitors operational parameters such as 4...20 mA signal range, position deviation, and positioning time. Diagnosis parameters track valve movements and total travel, helping schedule maintenance proactively. The aluminium case provides durability in industrial environments.
Compatibility & Integration
The V18345-2010521001 communicates via HART protocol for extended monitoring and diagnosis. It integrates with most distributed control systems (DCS) and programmable logic controllers (PLCs) that support 4...20 mA analog input. The analog feedback module outputs a 4...20 mA signal for position indication.
Selection Guide & Purchasing Advice
Before purchasing, verify your actuator type (linear or rotary) and mounting interface (NAMUR or VDI/VDE 3845). Confirm the air supply pressure and electrical power availability. The V18345-2010521001 is a double-acting, fail freeze model; if you need single-acting or fail-safe action, choose a different configuration. SpareTechPLC stocks this exact model for fast delivery.
Frequently Asked Questions
Q: What is the input signal range for the V18345-2010521001?
A: The input signal is 4...20 mA, two-wire.
Q: Does this positioner include explosion protection?
A: No, the V18345-2010521001 is without explosion protection (code 0).
Q: What type of position feedback does it provide?
A: It includes a plug-in module for analog position feedback, signal range 4...20 mA, two-wire.
Q: Can I use this positioner with a rotary actuator?
A: Yes, it is suitable for rotary actuators per VDI/VDE 3845.
Q: What happens if electrical power fails?
A: The double-acting, fail freeze output holds the valve in its last position.
