V18345-2020121101 ABB TZIDC Electro-Pneumatic Valve Positioner

V18345-2020121101 ABB TZIDC Intelligent Electro-Pneumatic Positioner

The V18345-2020121101 is an electronically configurable electro-pneumatic valve positioner engineered by ABB for precise control of pneumatic linear and rotary actuators. Equipped with an integrated local operator panel, mechanical position indicator, and HART communication over a two-wire 4–20 mA loop, the TZIDC Series delivers ultra-low air consumption (< 0.03 kg/h) and automated stroke self-calibration in demanding process plants.

Order Code & Configuration Tree Breakdown

• Base Product Family (V18345): ABB TZIDC Intelligent Electro-Pneumatic Positioner with Local LCD & Operator Keys
  • Case & Mounting (2): Varnished aluminum IP65 (NEMA 4X) housing for DIN/IEC 534 (NAMUR) linear or VDI/VDE 3845 rotary actuators, complete with mechanical position indicator
  • Input & Communication (0 / 2): Two-wire 4–20 mA input with LKS adapter plug and FSK module for HART protocol communication
  • Explosion Protection (0): General-purpose non-hazardous area execution (without Ex certification)
  • Output & Fail-Safe Action (1): Single-acting pneumatic output; vents actuator air to fail-safe position upon electrical power loss
  • Process Connections (2): Cable entry: 1/2-14 NPT thread; Pneumatic air ports: 1/4-18 NPT thread
  • Analog Feedback Module (1): Factory plug-in analog position feedback module (4–20 mA two-wire output)
  • Mechanical Digital Switch Kit (1 / 0): Mechanical proximity switch option code (SJ2-SN NC interface architecture / standard base build)
  • Design & Varnish (1): Standard stove-hardened epoxy resin finish (RAL 9005 matte black case, Pantone 420 cover)

Pneumatic, Electrical & Control Parameters

Warranty Protection & Global Express Logistics

• 12-Month Comprehensive Warranty: Every V18345-2020121101 positioner carries a full 12-month warranty covering the piezo I/P converter block, microprocessor control board, and plug-in feedback electronics.
• Worldwide Air Courier Dispatch: Packaged in protective foam inserts and dispatched globally via FedEx, UPS, or DHL to support urgent plant turnaround and valve maintenance schedules.

Control Valve Engineering FAQ & Selection Guidance

• Q: How does the single-acting fail-safe output (-1 code) protect process loops during a sudden 4–20 mA loop break?

  A: Upon loss of loop current, the internal pneumatic pilot stage immediately exhausts actuator chamber pressure, allowing the actuator return spring to drive the valve to its mechanical fail-safe state.

• Q: What pneumatic filtration quality is mandatory to prevent clogging inside the TZIDC pilot valve?

  A: Supply dry, oil-free instrument air filtered to at least 5 microns (per ISO 8573-1) at 1.4 to 6 bar to protect the low-bleed piezo nozzle assembly from particulate fouling.

• Q: Can technicians configure split-range operation for two control valves driven by a single analog output card?

  A: Yes, adjust the setpoint range locally or via HART (minimum 3.2 mA span, recommended > 8.0 mA) so one valve strokes from 4–12 mA and the second strokes from 12–20 mA.

• Q: Why is the external mechanical position indicator valuable on an intelligent digital positioner?

  A: It provides immediate, zero-power visual verification of valve stem travel from a distance, even when the 4–20 mA control loop is de-energized during plant lockouts.

• Q: When should engineers choose this NPT-threaded model over G 1/4 and M20 metric thread variants?

  A: Specify the V18345-2020121101 (1/2-14 NPT cable and 1/4-18 NPT air ports) for North American facilities and skids standardized on ANSI/NPT conduit fittings and stainless instrument tubing.

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