Product Overview
When process control demands precise valve positioning in harsh environments, the ABB V18345-1027420001 Electro-Pneumatic Positioner delivers reliable performance. This device is designed for mounting to linear actuators per DIN/IEC 534/NAMUR or rotary actuators per VDI/VDE 3845. Its aluminum case with IP 65 (NEMA 4X) protection withstands dust and water jets, reducing maintenance costs from environmental damage. The V18345-1027420001 accepts a 4...20 mA two-wire input, making it compatible with most standard control systems. With GOST Russia Ex II 2 G EEx ib II C T6 explosion protection, it operates safely in hazardous areas, avoiding costly safety incidents.
Technical Specifications Breakdown
Input Signal: The nominal range is 4...20 mA with split range configuration between 20% and 100% of the nominal range. Maximum input is 25 mA at 30 V. Minimum current is 3.4 mA without analog position feedback or 3.5 mA with it. Load voltage at 20 mA is 8.7 V DC without explosion protection and 9.7 V DC for intrinsically safe devices. Impedance at 20 mA is 435 ohms without explosion protection and 485 ohms for intrinsically safe devices. These values ensure efficient power use, lowering operational energy costs.
Digital Input: Control voltage is 24 V DC (12...30 V DC). Logic levels are 0...10 V DC for logical "0" and 12...30 V DC for logical "1", with maximum current of 4 mA. This clear logic simplifies integration, reducing setup time and engineering costs.
Digital Output (NAMUR): Supply voltage is 5...11 V DC. Current below 1.0 mA indicates logical "0", and above 2.0 mA indicates logical "1". Effective direction is configurable, offering flexibility that minimizes reconfiguration expenses.
Output Range: The positioner provides 0...6 bar (0...90 psi). Air capacity at 1.4 bar supply is 5.0 kg/h (3.9 Nm³/h or 2.3 scfm); at 6 bar supply it is 13 kg/h (10 Nm³/h or 6.0 scfm) with booster on request. This capacity supports fast actuator response, improving process efficiency.
Travel and Timing: Angle of rotation range is 25...120° for rotary actuators (optionally 270°) and 25...60° for linear actuators. Travel time prolongation is 0...200 seconds per direction, and positioning time limit is also 0...200 seconds. These adjustable parameters allow fine-tuning to match process dynamics, reducing waste and rework.
Industry Applications
In chemical processing, the V18345-1027420001 controls valve position for precise chemical dosing. Its double acting output and fail-safe venting or blocking during power loss prevent costly spills and equipment damage. The GOST explosion protection ensures compliance in hazardous zones, avoiding regulatory fines.
In oil and gas pipelines, this positioner manages pressure control valves. The 4...20 mA input integrates with existing DCS or PLC systems, minimizing upgrade costs. The IP 65 case resists corrosion and moisture, extending service life and reducing replacement expenses.
Installation and Setup Guidance
Mount the positioner directly to linear actuators using the NAMUR interface or to rotary actuators per VDI/VDE 3845. Use the 1/2-14 NPT cable thread and 1/4-18 NPT air pipe thread for connections. Wire the 4...20 mA input via the connector plug for LKS adapter. Configure the split range between 20% and 100% of nominal range to match actuator stroke. Set the fail-safe position (double acting, fail safe) according to process requirements. Calibrate travel limits within 0...100% of total travel (minimum range >20%). Adjust travel time prolongation and positioning time limit between 0 and 200 seconds as needed. This straightforward setup reduces installation labor costs.
Maintenance and Reliability
Inspect the aluminum case and seals periodically to maintain IP 65 integrity. Check air pipe connections for leaks at 1/4-18 NPT threads. Verify the 4...20 mA input signal accuracy and digital input logic levels. Monitor output pressure range (0...6 bar) and air capacity to ensure consistent performance. The robust design minimizes unplanned downtime, lowering total cost of ownership. Follow manufacturer guidelines for any internal servicing to preserve explosion protection certification.
Compatibility and Integration
The V18345-1027420001 integrates with any system providing a 4...20 mA two-wire signal. Its digital output follows NAMUR (DIN 19234) standard for feedback to PLCs or DCS. The digital input accepts 24 V DC control signals. No proprietary communication protocols are required, reducing integration complexity and costs. Use with linear or rotary actuators that meet DIN/IEC 534/NAMUR or VDI/VDE 3845 standards.
Selection Guide and Purchasing Advice
Before ordering, verify the actuator type (linear or rotary) and mounting interface. Confirm the required explosion protection level (GOST Ex II 2 G EEx ib II C T6). Ensure the input signal range (4...20 mA) matches your control system. Check that the output pressure range (0...6 bar) covers your actuator requirements. The V18345-1027420001 includes the standard design varnish/coding. For availability and lifecycle status, contact SpareTechPLC, your reliable source for industrial automation parts.
Frequently Asked Questions
Q: What is the input signal range for the V18345-1027420001?
A: The nominal input range is 4...20 mA, with split range configuration between 20% and 100% of the nominal range. Maximum input is 25 mA at 30 V.
Q: What explosion protection does this positioner have?
A: It has GOST Russia Ex II 2 G EEx ib II C T6 certification for intrinsically safe operation in hazardous areas.
Q: Can this positioner be used with double acting actuators?
A: Yes, it supports double acting actuators with fail-safe venting or blocking during power loss.
Q: What are the air connection sizes?
A: The cable thread is 1/2-14 NPT and the air pipe thread is 1/4-18 NPT.
Q: What is the weight and enclosure rating?
A: The weight is 1.70 kg, and the case is aluminum with IP 65 (NEMA 4X) protection.
