ABB V18345-1010521001 TZIDC intelligent valve positioner

The captured ABB listing identifies V18345-1010521001 as a TZIDC intelligent valve positioner. The listing specifies a 4 to 20 mA two-wire input, double-acting fail-freeze behavior, and a 4 to 20 mA analog position-feedback module.

Documented system function and position

Rebuilt from individual evidence

The captured ABB listing identifies V18345-1010521001 as a TZIDC intelligent valve positioner.

The listing specifies a 4 to 20 mA two-wire input, double-acting fail-freeze behavior, and a 4 to 20 mA analog position-feedback module.

Sits between the process controller's 4 to 20 mA command and the pneumatic valve actuator.

Unknown: installed wiring, firmware, condition, and installation-specific compatibility are not established by the captured sources.

Exact reference: V18345-1010521001
Category: PLC / CPU
Evidence checked: 2026-09-12

System role

This section explains what the product does and where it acts in the surrounding system.

Function: Controls pneumatic valve position from the documented 4 to 20 mA command.
System position: Sits between the process controller's 4 to 20 mA command and the pneumatic valve actuator.
Upstream / inputs: Receives a 4 to 20 mA two-wire command from the process controller.
Downstream / outputs: Drives the downstream pneumatic valve actuator and provides analog position feedback.
Limitations: Unknown: installed wiring, firmware, condition, and installation-specific compatibility are not established by the captured sources.

Evidence ledger

Facts, inferences, and unknowns are kept separate.

Facts

The captured ABB listing identifies V18345-1010521001 as a TZIDC intelligent valve positioner.
Confidence: high
- www.teknihaus.com — retrieved 2026-09-12; medium confidence
The listing specifies a 4 to 20 mA two-wire input, double-acting fail-freeze behavior, and a 4 to 20 mA analog position-feedback module.
Confidence: high
- www.teknihaus.com — retrieved 2026-09-12; medium confidence
- docs.primetenders.com — retrieved 2026-09-12; medium confidence
Controls pneumatic valve position from the documented 4 to 20 mA command.
Confidence: high
- www.teknihaus.com — retrieved 2026-09-12; medium confidence

Inferences

Inferred system position: Sits between the process controller's 4 to 20 mA command and the pneumatic valve actuator.
Confidence: medium
Rationale: The exact-reference identity and documented product function establish the adjacent system stages.
- www.teknihaus.com — retrieved 2026-09-12; medium confidence

Unknowns

Unknown: installed wiring, firmware, condition, and installation-specific compatibility are not established by the captured sources.
Confidence: low
Missing evidence: The captured sources do not establish installed wiring, firmware, condition, or installation-specific compatibility.

System position diagram

A flow from Receives a 4 to 20 mA two-wire command from the process controller. through V18345-1010521001 to Drives the downstream pneumatic valve actuator and provides analog position feedback.. — System placement inferred from the cited evidence: Sits between the process controller's 4 to 20 mA command and the pneumatic valve actuator.

View Mermaid source

flowchart LR
  upstream["Receives a 4 to 20 mA two-wire command from the process controller."] -->|documented path| item["V18345-1010521001"]
  item -->|documented path| downstream["Drives the downstream pneumatic valve actuator and provides analog position feedback."]

View diagram labels

Nodes: Receives a 4 to 20 mA two-wire command from the process controller.; ABB V18345-1010521001 TZIDC intelligent valve positioner; Drives the downstream pneumatic valve actuator and provides analog position feedback.
Edges: Documented upstream path; Documented downstream path

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