ABB V18345.20.2.0.4.5.1.00.1 TZIDC Intelligent Electro-Pneumatic Valve Positioner

The ABB V18345.20.2.0.4.5.1.00.1 is a specific configuration of the ABB TZIDC intelligent electro-pneumatic positioner family. The corresponding compressed ordering designation is V18345-2020451001. The TZIDC is designed for precise positioning and control of pneumatic actuators used with industrial control valves. By combining electronic position control with a pneumatic output stage, the device converts an electrical control signal into controlled pneumatic actuator movement.

This configuration is designed around a 4–20 mA two-wire input with HART communication, a double-acting fail-safe pneumatic output arrangement, and an analog position feedback module. The combination provides closed-loop valve positioning together with an electrical signal representing the actual valve position. This makes the positioner suitable for process automation applications where accurate control, monitoring, and reliable actuator positioning are important.

Product Identification

ABB TZIDC Positioner Configuration

The detailed ordering code provides important information about the configuration of this particular TZIDC positioner. The V18345 designation identifies the TZIDC electro-pneumatic positioner platform. The configuration includes an aluminum housing with mechanical position indication and mounting provisions suitable for compatible linear or rotary actuators.

The electrical configuration provides a 4–20 mA two-wire input together with HART communication. The selected pneumatic arrangement is intended for double-acting actuators with a fail-safe configuration. The device also incorporates an analog position feedback module that provides a 4–20 mA signal corresponding to the measured valve position.

Because the complete ordering code represents multiple configuration options, the full designation should be retained when identifying the device or matching it with an existing valve actuator assembly. The complete model number is more precise than simply referring to the equipment as a TZIDC positioner.

4–20 mA and HART Communication

One of the important characteristics of the ABB V18345.20.2.0.4.5.1.00.1 is its 4–20 mA two-wire control input with HART communication. The 4–20 mA signal provides the primary analog command used by the positioner to determine the required actuator position. HART communication adds digital communication capability to the conventional analog control loop.

This arrangement is particularly useful in process automation systems that use established analog instrumentation architectures while requiring additional configuration and diagnostic functions. The TZIDC platform can therefore operate within conventional control systems while providing digital communication capabilities for device configuration and process information.

Double-Acting Fail-Safe Operation

The V18345.20.2.0.4.5.1.00.1 configuration is designed for double-acting pneumatic actuators. A double-acting actuator uses pneumatic pressure on both sides of the actuator mechanism, allowing controlled movement in both directions. The positioner regulates the pneumatic output according to the electrical command and the measured actuator position.

The fail-safe configuration defines the response of the actuator system when the relevant control conditions are interrupted. The actual safe position depends on the complete valve, actuator, pneumatic circuit, and process safety arrangement. For this reason, the positioner should always be evaluated together with the connected actuator and valve when designing or maintaining a control system.

Analog Position Feedback

The integrated analog position feedback module is another important feature of this configuration. It provides a 4–20 mA signal representing the measured position. This output can be connected to a control system, monitoring device, or analog input to provide continuous feedback of the valve position.

Independent position feedback allows a control system to compare the requested valve position with the actual measured position. This can help operators identify position deviations, monitor actuator movement, and support maintenance activities within automated process installations.

Mechanical Design and Mounting

The TZIDC housing is constructed from varnished aluminum and incorporates a mechanical position indicator. The TZIDC platform supports mounting arrangements for compatible pneumatic linear and rotary actuators. Depending on the actuator and mounting arrangement, the positioner can be integrated into different types of industrial control valve assemblies.

The IP65 / NEMA 4X housing protection is designed for industrial environments where protection against dust and water ingress is required. The electrical and pneumatic connection configuration of the V18345.20.2.0.4.5.1.00.1 provides defined interfaces for integrating the positioner with compatible instrumentation and pneumatic equipment.

Technical Specifications

• Manufacturer: ABB
• Product Family: TZIDC
• Model: V18345.20.2.0.4.5.1.00.1
• Ordering Code: V18345-2020451001
• Product Type: Intelligent electro-pneumatic positioner
• Input Signal: 4–20 mA, two-wire
• Communication: HART
• Actuator Type: Double acting
• Safety Configuration: Fail safe
• Position Feedback: Analog 4–20 mA
• Housing Material: Varnished aluminum
• Housing Protection: IP65 / NEMA 4X
• Electrical Connection: M20 × 1.5
• Pneumatic Connection: 1/4-18 NPT
• Mechanical Position Indicator: Included

Industrial Applications

The ABB TZIDC V18345.20.2.0.4.5.1.00.1 is designed for industrial valve automation applications requiring accurate pneumatic actuator positioning. Typical applications include process control valves, pneumatic control systems, production equipment, energy systems, chemical processing, water treatment, and other automated installations where continuous valve position control is required.

The combination of analog control, HART communication, pneumatic positioning, and analog position feedback enables the device to function as part of a broader process instrumentation system. Its flexible mounting concept also allows the TZIDC platform to be used with compatible linear and rotary actuator arrangements.

Process Control and Valve Automation

In an automated process, the positioner acts as the interface between the control system and the pneumatic actuator. The control system sends the required position through the 4–20 mA signal. The TZIDC processes this command and adjusts the pneumatic output so that the actuator moves toward the requested position.

The feedback system continuously provides information about the actual position. This closed-loop arrangement helps maintain the commanded valve position even when operating conditions change. HART communication can additionally support digital interaction with the positioner, making the device suitable for instrumentation systems requiring both analog control and digital device communication.

Installation Considerations

When integrating the ABB V18345.20.2.0.4.5.1.00.1 into an existing installation, the complete ordering code should be checked against the required actuator, valve, electrical loop, pneumatic connections, and feedback requirements. Correct mechanical mounting is essential for accurate position measurement because the positioner must accurately detect actuator movement.

The pneumatic supply should also comply with the requirements of the complete actuator and positioner system. Electrical wiring should be connected according to the applicable installation documentation and the control system design. When HART communication is used, the loop configuration should be compatible with the communication requirements of the instrumentation system.

Conclusion

The ABB V18345.20.2.0.4.5.1.00.1 is a specific configuration of the ABB TZIDC intelligent electro-pneumatic valve positioner family. Its 4–20 mA two-wire input, HART communication, double-acting fail-safe pneumatic configuration, IP65 / NEMA 4X aluminum housing, and analog 4–20 mA position feedback make it suitable for industrial pneumatic valve control and process instrumentation.

For equipment identification and system integration, the complete ordering designation V18345.20.2.0.4.5.1.00.1 should be retained because the individual configuration elements identify specific electrical, pneumatic, mechanical, and feedback options. Using the complete model number helps ensure accurate identification when selecting compatible components or integrating the positioner into an existing industrial control system.