ABB V18345-1010221001 Electro-Pneumatic Positioner | TZIDC Series with Fault Lockout

ABB V18345-1010221001 TZIDC positioner specifications. Single-acting, fault lockout (fail closed), 4-20mA HART, IP65. For valve control in process industries.

ABB V18345-1010221001 Electro-Pneumatic Positioner

The ABB V18345-1010221001 is a TZIDC series electro-pneumatic positioner designed for precise control of single-acting pneumatic actuators. This model features a fault lockout (fail closed)​ safety function and HART communication capability, making it suitable for applications requiring fail-safe operation in the event of power or signal loss.

Key Features

• Fault Lockout Function:​ Fail closed (FC) safety position on signal/power loss.

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

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

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

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

Technical Specifications

Model Number Decoding (V18345-1010221001)

• 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 = single-acting)

• 2:​ Fail-safe function (2 = fault lockout/fail closed)

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

• 1:​ Option modules (1 = standard configuration)

• 0:​ Design (0 = standard)

• 0:​ Additional options (0 = standard)

• 1:​ Reserved

Key Difference from V18345-1010121001

The primary difference is the fail-safe function:

• V18345-1010221001:​ Fault lockout (fail closed) - valve closes on signal/power loss

• V18345-1010121001:​ Fail-safe reset (fail open) - valve opens on signal/power loss

All other technical specifications (input/output signals, housing, accuracy, etc.) remain identical between these two variants.

Typical Applications

• Control valves in chemical processing plants

• Safety shutdown systems in oil and gas facilities

• Water and wastewater treatment systems

• Process control requiring fail-closed safety function

• HVAC and building automation (where fail-closed is required)

Important Selection & Installation Notes

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

2. Fail-Safe Function:​ The fault lockout (fail closed) function requires a single-acting actuator with spring return. Ensure the actuator spring force is sufficient for the application.

3. Configuration Required:​ The positioner requires configuration (characteristic curve, fail-safe mode verification) using a HART communicator or ABB configuration software before commissioning.

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

5. Safety Considerations:​ For safety-critical applications, verify the fail-safe function through proper testing and validation procedures.

Note: Specifications are based on the TZIDC series data. The exact configuration for this specific model number includes fault lockout functionality. For complete technical data, dimensional drawings, and installation guidelines, consult the official ABB TZIDC Positioner Technical Manual​ or contact ABB technical support.