Product Overview

The ABB V18345-1021420001 is a TZIDC electro-pneumatic positioner with intelligent configuration. This unit includes an indicator and operator panel for local control. The case uses varnished aluminium for mounting to linear actuators per DIN/IEC 534 or NAMUR standards. Rotary actuators per VDI/VDE 3845 are also compatible with this model. Input signal accepts 4 to 20 mA on a two-wire loop. A connector plug accommodates the LKS adapter and FSK module for HART communication. Explosion protection meets ATEX II 2 G Ex ib IIC T6 (or T4) requirements. Output configuration is double-acting with fail-safe functionality. Cable connections use 1/2-14 NPT threads. Air pipe connections use 1/4-18 NPT threads. The V18345-1021420001 includes a plug-in module for analog position feedback with 4 to 20 mA signal range.

Technical Specifications

General Specifications

Input Specifications

Digital Input Specifications

Output Specifications (Compressed Air)

Digital Output Specifications (DIN 19234/NAMUR)

Travel & Rotation Specifications

Intelligent TZIDC Design

The V18345-1021420001 features fully configurable intelligent operation. An indicator and operator panel provide local access for setup and diagnostics. The varnished aluminium case resists corrosion in industrial environments. For linear actuators, mounting follows DIN/IEC 534 or NAMUR standards. For rotary actuators, mounting follows VDI/VDE 3845 standards instead. This flexibility makes the ABB V18345-1021420001 suitable for virtually any valve type.

HART Communication Capability

The input/communication port includes a connector plug for the LKS adapter. An FSK module enables HART communication over the 4-20 mA loop. Two-wire technology carries both power and signal on the same pair. Split range configuration adjusts between 20% and 100% of nominal range as needed. Maximum current reaches 25 mA for safety. Minimum current drops to 3.6 mA for loop diagnostics. Starting current is 3.8 mA for reliable turn-on. Load voltage at 20 mA measures 9.7 V. Impedance at 20 mA measures 485 Ω. Therefore, the V18345-1021420001 integrates easily into existing HART networks.

Double-Acting Fail-Safe Operation

Output configuration is double-acting with fail-safe functionality. In case of electrical power failure, the positioner moves to a safe position. Air is vented from the actuator or blocked depending on configuration. Shut-off values for end position 0% range from 0-45%. Shut-off values for end position 100% range from 55-100%. Air capacity at 1.4 bar (20 psi) supply pressure reaches 5.0 kg/h (3.9 Nm³/h or 2.3 scfm). At 6 bar (90 psi) supply pressure, air capacity increases to 13 kg/h (10 Nm³/h or 6.0 scfm). Output range spans 0-6 bar (0-90 psi). The ABB V18345-1021420001 works with both single and double-acting actuators reliably.

Analog Position Feedback Module

This model includes a plug-in module for analog position feedback. Signal range is 4-20 mA on a two-wire loop. The feedback module provides continuous position indication to a control system. For maintenance and monitoring, this feedback proves invaluable. The option module code 1 specifies this analog feedback configuration. Without this module, position feedback would not be available. Consequently, the V18345-1021420001 with analog feedback suits applications requiring remote position indication.

Digital Input & Output Features

A digital input accepts control voltage signals. Logical switching state "0" uses 0-5 V DC. Logical switching state "1" uses 11-30 V DC. Maximum current for the digital input is 4 mA. A digital output follows DIN 19234/NAMUR standards. Supply voltage for the digital output ranges 5-11 V DC. Logical "0" current falls between >0.35 mA and <1.2 mA. Logical "1" current exceeds 2.1 mA. Effective direction is configurable as normally logical "0" or logical "1". For external status monitoring, this digital output provides valuable data.

Travel & Rotation Configuration

Rotation angle for rotary actuators spans 25-120° (270° optional). For linear actuators, rotation angle spans 25-60° instead. Travel limits are freely configurable between 0-100% of total travel. Minimum range must exceed 20% for proper operation. Travel time prolongation reaches 0-200 seconds, separately for each direction. Dead band time limit also reaches 0-200 seconds. This parameter monitors control until deviation reaches the tolerance band. Therefore, the V18345-1021420001 adapts to slow or fast valve responses.

Installation Guidelines

Follow these steps for proper installation of the V18345-1021420001.

1. Mount the positioner on the linear or rotary actuator using appropriate brackets.

2. Connect the air supply to the 1/4-18 NPT port. Use clean, dry instrument air.

3. Connect the output air pipes to the actuator ports. Observe double-acting configuration.

4. Wire the 4-20 mA input to terminals. Observe correct polarity for two-wire loop.

5. Connect the HART communication via the LKS adapter and FSK module.

6. Wire the analog position feedback (4-20 mA) to monitoring system if used.

7. Apply power and air supply then perform auto-calibration through the operator panel.

8. Verify fail-safe operation by removing electrical power and observing actuator movement.

Note: The V18345-1021420001 requires clean, dry instrument air meeting ISA standards. Maximum input current must not exceed 25 mA. For ATEX hazardous area installations, observe all local wiring regulations. Do not open the enclosure while energized in explosive atmospheres.

Packaging List

• One ABB V18345-1021420001 TZIDC Electro-Pneumatic Positioner

• One plug-in module for analog position feedback (4-20 mA, two-wire)

• One product installation and operation manual

• One anti-static protective bag

Common FAQs

1. What is the input signal range for the V18345-1021420001?

Input signal range is 4 to 20 mA nominal on a two-wire loop. Split range configuration works between 20% and 100% of nominal range. Maximum current reaches 25 mA for overload protection. Minimum current drops to 3.6 mA for diagnostics. Starting current is 3.8 mA for reliable turn-on. The ABB V18345-1021420001 accepts standard industrial control signals.

2. What hazardous area approvals does the V18345-1021420001 carry?

Explosion protection is ATEX II 2 G Ex ib IIC T6 (or T4) Gb. This approval covers Zone 1 and Zone 2 gas hazardous areas. Intrinsic safety protection uses the "ib" protection level. Temperature class T6 applies for lower temperatures. Temperature class T4 applies for higher temperatures. The V18345-1021420001 suits European hazardous area installations.

3. Is the V18345-1021420001 single-acting or double-acting?

This model is double-acting with fail-safe functionality. In case of electrical power failure, the positioner moves to a safe position. Air is vented from the actuator or blocked depending on configuration. The output works with both single and double-acting actuators. For double-acting actuators, both air supply ports are used. The ABB V18345-1021420001 provides full control in either configuration.

4. What position feedback does the V18345-1021420001 include?

This model includes a plug-in module for analog position feedback. Signal range is 4-20 mA on a two-wire loop. The feedback provides continuous position indication to the control system. Without this module, analog feedback would not be available. The V18345-1021420001 with analog feedback suits remote monitoring applications.

5. What are the air connection threads on the V18345-1021420001?

Cable connections use 1/2-14 NPT threads for electrical wiring. Air pipe connections use 1/4-18 NPT threads for supply and output air. These NPT threads are standard for North American installations. For metric thread requirements, order a different connection option instead. The V18345-1021420001 with NPT threads suits North American and other imperial-thread markets.

Why Choose This Positioner?

The ABB V18345-1021420001 delivers intelligent electro-pneumatic positioning for critical valve control. TZIDC design with operator panel enables local configuration and diagnostics. HART communication provides remote access to positioner parameters. Double-acting fail-safe operation ensures safe valve positioning on power loss. Analog position feedback (4-20 mA) offers continuous remote indication. ATEX explosion protection permits hazardous area installation. For process valve applications requiring intelligent positioning, choose the V18345-1021420001.