The positioner links the DCS and valve: it reads the command, measures actual position and adjusts air to bring the actuator to the setpoint. Geyser IC supports both EDP300 and the widely installed TZIDC V18345.
4–20 mA/HART, auto-adjustment, non-contact position sensing, high pneumatic capacity, graphical display, remote sensor, natural-gas operation and extensive diagnostics. Optional pressure sensors support valve, actuator and pneumatic diagnostics.
4–20 mA/HART, auto-adjustment, local operation, linear or rotary actuators, remote sensing and robust construction. ABB positions it as a standard-performance family and continues to offer it.
| Requirement | TZIDC V18345 | EDP300 |
|---|---|---|
| Standard 4–20 mA/HART loop | Very suitable | Suitable |
| TZIDC installed base / replacement | First choice | Worth assessing |
| Extended diagnostics | Standard | Strong capability |
| Pressure sensors / valve diagnostics | More limited than EDP | Dedicated option |
| High air capacity / demanding actuators | To be checked | Strong capability |
| Remote position sensing | Yes | Yes |
| Natural-gas operation | Check the specific configuration | Provided by ABB |
The family includes HART, PROFIBUS PA, FOUNDATION Fieldbus and flameproof versions.
AV1 and AV2 are conventional positioners: AV1 uses pneumatic input, AV2 electrical 4–20 mA input. AVPT is a position transmitter with a 4–20 mA output and separate documentation.
The linkage must cover the stroke correctly without reaching the sensor's mechanical travel limits.
Tubing and configuration must match the actuator. Errors can cause reversed or unstable movement.
Use clean, dry air and a suitable filter/regulator. Oil, water and particles can block nozzles, relays and spools.
Long or undersized tubing slows the actuator and degrades loop dynamics.
The valve may move through its stroke during commissioning. Isolate or otherwise secure the process.
Fail-safe, fail-freeze and air-failure responses must match the safety strategy.
Download the documents for your model. Shared manuals, protocols and versions are identified in each document card.
HW 5.01 generation datasheet. Check hardware revision and nameplate options. The manual distinguishes versions with and without non-contact position sensing.
Flameproof enclosure version. Check the hardware and approvals of the specific configuration.
Revision 3 generation documentation. Shared manual for TZIDC-110 and TZIDC-120.
Revision 3 generation documentation. The protocol differs from TZIDC HART.
Flameproof enclosure variant, revision 3 generation. Shared TZIDC-210 / TZIDC-220 manual.
Flameproof enclosure variant, revision 3 generation.
AV1 with pneumatic input; electropneumatic AV2. Shared AV1 / AV2 operating manual.
AVPT provides a 4–20 mA position signal. Manual PN24951 covers AVPT2020 and is an original scan.
Original PDFs for installed instruments. Check the full model code, protocol and instrument revision.
Document 10/18-0.22-EN rev. K, retained for installed instruments. Compare the version and hardware revision with the nameplate.
TZIDC is the established standard-performance platform still offered by ABB. EDP300 is the advanced choice for more extensive diagnostics, high air capacity, optional modules, pressure sensors or demanding applications.
Yes. ABB continues to list TZIDC as a current 4–20 mA/HART product. Availability of individual variants and codes must still be checked.
V18345 identifies standard HART TZIDC; V18348 identifies TZIDC-200 with a flameproof enclosure. V18349 and V18350 are flameproof fieldbus variants.
Auto-adjustment identifies stroke and initial parameters; adaptation optimises control behaviour. Neither replaces correct mechanical mounting.
Where the positioner must be separated from vibration, heat, poor access or harsh conditions, leaving only the position sensor at the valve stem.
No. It can partly compensate for deadband and friction, but overtight packing, an undersized actuator or faulty mechanics require work on the valve itself.
An I/P converts the signal without knowing valve position. A positioner uses position feedback to correct actuator air in a closed loop.
