ABB V18345-2021150001 Electro-Pneumatic Positioner | TZIDC with Profibus PA & Single-Acting Specs

ABB V18345-2021150001 TZIDC positioner specifications. Profibus PA fieldbus, IP65, single-acting fail-safe, no feedback. For process automation valve control.

ABB V18345-2021150001 Electro-Pneumatic Positioner

The ABB V18345-2021150001 is a TZIDC series electro-pneumatic positioner with Profibus PA fieldbus communication​ capability. This model features single-acting operation​ with fail-safe (open/close) functionality and is configured without position feedback. It is designed for integration into Profibus PA process automation networks where single-acting actuators are used and position monitoring is not required.

Key Features

• Profibus PA Communication:​ Digital fieldbus communication for integration with DCS/PLC systems.

• Single-Acting Operation:​ Designed for single-acting actuators with spring return.

• Fail-Safe Function:​ Moves to safe position (open or close) on signal/power loss.

• No Position Feedback:​ This configuration does not include analog feedback module.

• Robust Construction:​ IP65-rated aluminum housing suitable for industrial environments.

Technical Specifications

Model Number Decoding (V18345-2021150001)

• V18345:​ Series identifier for TZIDC positioners

• 2:​ Case/mounting type (2 = aluminum housing, IP65)

• 0:​ Input/communication (0 = Profibus PA fieldbus)

• 2:​ Explosion protection (2 = without explosion protection - standard version)

• 1:​ Output/safe position (1 = single-acting, fail-safe)

• 1:​ Connections (1 = cable thread 1/2-14 NPT, air pipe 1/4-18 NPT)

• 5:​ Option modules (5 = no plug-in module​ - position 6 indicates "no feedback")

• 0:​ Design (0 = standard)

• 0:​ Additional options (0 = standard)

• 0:​ Reserved

• 1:​ Reserved

Key Differentiators:

• Position 2:​ "0" = Profibus PA fieldbus (vs. "0" in previous models for 4-20mA+HART)

• Position 5:​ "1" = single-acting fail-safe (vs. "0" for double-acting in previous models)

• Position 6:​ "5" = no feedback module (vs. "2" for analog feedback in some models)

Key Differences from Previous Models

Compared to the previously discussed V18345 variants:

• V18345-2021150001:​ Profibus PA + single-acting fail-safe​ + no feedback​ (this model)

• V18345-2020521501:​ Profibus PA + double-acting fail-freeze + with analog feedback

• V18345-1010221001:​ 4-20mA HART + single-acting fail closed + no feedback

• V18345-1021521001:​ ATEX + 4-20mA HART + double-acting fail-safe + with feedback

The 2021150001​ configuration combines Profibus PA fieldbus​ with single-acting actuator support​ and no position feedback, making it suitable for cost-sensitive fieldbus applications with single-acting valves.

Typical Applications

• Single-acting control valves in chemical plants with Profibus PA networks

• Process control systems requiring fieldbus communication with spring-return actuators

• Water and wastewater treatment systems with single-acting valves

• HVAC systems with fieldbus integration

• Applications where position feedback is not required for the control system

Important Selection & Installation Notes

1. Fieldbus Network Requirement:​ This positioner requires a Profibus PA fieldbus network. It cannot be used with traditional 4-20mA analog control systems.

2. Actuator Compatibility:​ Designed for single-acting actuators only​ (with spring return). Verify your actuator type before selection.

3. No Position Feedback:​ This model does not provide​ a 4-20mA position feedback signal. If your control system requires valve position monitoring, select a model with analog feedback.

4. Fail-Safe Function:​ On signal/power loss, the valve moves to the configured safe position (open or close). Ensure this meets your process safety requirements.

5. Profibus PA Configuration:​ Requires proper network configuration, address setting, and integration with the DCS/PLC system.

6. Wiring:​ Use Profibus PA certified cable and follow fieldbus installation guidelines.

7. Configuration:​ Requires configuration using Profibus PA configuration tools or ABB fieldbus configuration software.

Note: Specifications are based on the TZIDC series data and model number decoding conventions. The exact configuration for this specific model number includes Profibus PA communication, single-acting operation, fail-safe functionality, and no position feedback. For complete technical data, dimensional drawings, and Profibus PA installation guidelines, consult the official ABB TZIDC Positioner Technical Manual​ or contact ABB technical support.