ABB V18345-1021521001 Electro-Pneumatic Positioner | TZIDC with Explosion Protection Specs

ABB V18345-1021521001 TZIDC positioner specifications. ATEX certified, IP65, 4-20mA HART, double-acting fail-safe. For hazardous area valve control in process industries.

ABB V18345-1021521001 Electro-Pneumatic Positioner

The ABB V18345-1021521001 is a TZIDC series electro-pneumatic positioner with ATEX explosion protection certification, designed for use in hazardous areas (Zone 1/2). This model features double-acting operation with fail-safe functionality, HART communication, and is specifically engineered for applications requiring intrinsic safety compliance in potentially explosive atmospheres.

Key Features

• ATEX Certification:​ Approved for hazardous areas (Zone 1/2, Ex ia IIC T6/T4 Gb).

• Double-Acting Operation:​ Designed for double-acting actuators with fail-safe (open/close) functionality.

• 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 (V18345-1021521001)

• V18345:​ Series identifier for TZIDC positioners

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

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

• 2:​ Explosion protection (2 = ATEX certified, Ex ia IIC T6/T4 Gb)

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

• 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:

• V18345-1021521001:​ ATEX certified + double-acting fail-safe + analog feedback (this model)

• V18345-1010521001:​ Standard version (no explosion protection) + double-acting fail-freeze

• V18345-1010221001:​ Standard version + single-acting fail closed

• V18345-1010121001:​ Standard version + single-acting fail open

The 1021521001​ configuration is specifically designed for hazardous area applications​ requiring ATEX certification and double-acting actuators with fail-safe functionality.

Typical Applications

• Control valves in petrochemical and chemical plants (hazardous areas)

• Oil and gas production facilities (Zone 1/2 classified areas)

• Process control systems requiring ATEX certification

• Pharmaceutical and chemical processing in explosive atmospheres

• Water and wastewater treatment in hazardous environments

Important Selection & Installation Notes

1. Hazardous Area Classification:​ This model is certified for Zone 1/2 hazardous areas. Must​ be installed in accordance with ATEX directives and local electrical codes for intrinsically safe installations.

2. Actuator Compatibility:​ Designed for double-acting actuators only. Verify your actuator type and fail-safe requirements before selection.

3. Intrinsic Safety Barriers:​ Requires intrinsically safe barriers in the control loop when used in hazardous areas. Follow manufacturer's installation guidelines.

4. Configuration:​ Requires configuration using a HART communicator or ABB configuration software. Note:​ Some configuration functions may be restricted in hazardous area installations.

5. Wiring:​ Use shielded twisted-pair cable with proper grounding. In hazardous areas, follow ATEX wiring requirements and use certified cable glands.

6. Maintenance:​ Only qualified personnel trained in hazardous area equipment should perform maintenance or calibration.

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