ABB V18345-1010521001 Electro-Pneumatic Positioner | TZIDC Double-Acting Specs

ABB V18345-1010521001 TZIDC positioner specifications. Double-acting, fail-freeze, 4-20mA HART, IP65, with analog feedback. For valve control in process industries.

ABB V18345-1010521001 Electro-Pneumatic Positioner

The ABB V18345-1010521001 is a TZIDC series electro-pneumatic positioner designed for precise control of double-acting pneumatic actuators​ in industrial process applications. This model features fail-freeze (hold last position)​ functionality, HART communication, and includes a plug-in analog position feedback module as standard.

Key Features

• Double-Acting Operation:​ Designed for double-acting actuators with fail-freeze safety function.

• Analog Position Feedback:​ Standard 4-20mA position feedback signal for remote monitoring.

• HART Communication:​ 4-20mA two-wire input with HART protocol for configuration and diagnostics.

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

• Auto-Tuning:​ Microprocessor-based with automatic stroke adjustment.

Technical Specifications

Model Number Decoding (V18345-1010521001)

• V18345:​ Series identifier for TZIDC positioners

• 1:​ Case/mounting type (1 = aluminum housing, IP65)

• 0:​ Input/communication (0 = 4-20mA with HART)

• 1:​ Explosion protection (1 = without explosion protection)

• 0:​ Output/safe position (0 = double-acting, fail-freeze)

• 5:​ Connections (5 = cable thread M20x1.5, air pipe 1/4-18 NPT)

• 2:​ Option modules (2 = plug-in analog position feedback module)

• 1:​ Design (1 = standard)

• 0:​ Additional options (0 = standard)

• 0:​ Reserved

• 1:​ Reserved

Key Differences from Previous Models

Compared to the previously discussed V18345 variants:

• V18345-1010521001:​ Double-acting with fail-freeze + analog feedback (this model)

• V18345-1010221001:​ Single-acting with fault lockout (fail closed)

• V18345-1010121001:​ Single-acting with fail-safe reset (fail open)

The 1010521001​ configuration is specifically optimized for double-acting actuators requiring position feedback and fail-freeze functionality.

Typical Applications

• Control valves in chemical and petrochemical plants

• Process control in power generation facilities

• Water and wastewater treatment systems

• HVAC and building automation

• Applications requiring double-acting actuators with position monitoring

Important Selection & Installation Notes

1. Actuator Compatibility:​ This positioner is designed for double-acting actuators only. Verify your actuator type before selection.

2. Fail-Freeze Function:​ On signal/power loss, the valve holds its last position (does not move to safe position). Ensure this meets your process safety requirements.

3. Position Feedback:​ The included analog feedback module provides a 4-20mA signal proportional to valve position. This requires connection to your control system for monitoring.

4. Configuration Required:​ The positioner requires configuration (characteristic curve, feedback scaling, etc.) using a HART communicator or ABB configuration software before commissioning.

5. Supply Air Quality:​ Requires clean, dry compressed air (ISO 8573-1:2010 [7:4:4] or better) to ensure reliable operation.

Note: Specifications are based on the TZIDC series data and model number decoding conventions. The exact configuration for this specific model number includes double-acting operation, fail-freeze function, and analog position feedback. For complete technical data, dimensional drawings, and installation guidelines, consult the official ABB TZIDC Positioner Technical Manual​ or contact ABB technical support.