Product Overview

The V18345-2021421001 belongs to the ABB TZIDC series. This electro-pneumatic positioner offers smart configuration options. It includes a clear indicator and an operator panel. The device mounts easily on linear or rotary actuators.

Technical Specifications

The V18345-2021421001 uses a 4-20 mA input signal. This two-wire technology provides a nominal output range of 4-20 mA. The minimum signal is 4 mA. The maximum signal reaches 20 mA for 100% position. You can freely select split-range operation. The minimum recommended range is above 50% or 8.0 mA.

This ABB positioner supports both direct and reverse signal action. Direct action means 4-20 mA equals 0-100% position. Reverse action means 20-4 mA equals 0-100% position. The characteristic curve is linear by default. You can also choose equal percentage 1:25 or 1:50. User-defined curves use 20 reference points.

The digital input uses a control voltage of 0-5 V DC for logic "0". It uses 11-30 V DC for logic "1". The digital output follows DIN 19234/NAMUR standards. Its supply voltage ranges from 5 to 11 V DC.

The supply pressure range is 1.4 to 6 bar (20 to 90 psi). Air consumption stays below < 0.03 kg/h or 0.015 scfm. This low value remains independent of supply pressure. The housing uses varnished aluminum. It meets protection class IP 65 and NEMA 4X standards. The surface features black electrostatic dipping varnish. The case is RAL 9005 matte black. The cover matches Pantone 420.

Pneumatic connections use 1/4-18 NPT threads. The cable entry uses a 1/2-14 NPT thread. This device includes a plug-in module for analog position feedback. The feedback signal range is 4-20 mA. The mechanical position indicator is optional.

Key Parameters for the V18345-2021421001

The V18345-2021421001 acts as a double-acting positioner. It includes a fail-safe function for electrical power failure. The explosion protection rating is ATEX Ex II 2 G EEx ib II C T6. This ABB positioner has a connector plug for an LKS adapter. It also includes an FSK module for HART communication.

You can select protective functions via the digital input. Options include no function, move to 0% position, or move to 100% position. Other options are hold last position or disable local configuration. You can also disable all local and remote PC access. The selected function activates when the 24 V DC signal drops below 10 V DC.

Installation Guidelines

Mount the V18345-2021421001 on linear actuators per DIN/IEC 534. You can also mount it on rotary actuators per VDI/VDE 3845. Ensure the mounting surface is clean and flat. Use the correct thread type for air pipes (1/4-18 NPT). Connect the cable using the 1/2-14 NPT thread. Apply a supply pressure between 1.4 and 6 bar only. Double-check the fail-safe position before startup. Always connect the 4-20 mA loop correctly for two-wire operation.

Package List

• 1 x ABB V18345-2021421001 TZIDC Positioner

• 1 x Operator panel with indicator

• 2 x Thread adapters for air connections

• 1 x Mounting kit for linear actuators

• 1 x Product quick start manual

Frequently Asked Questions (FAQ)

Q1: Can the V18345-2021421001 work with rotary actuators?
Yes, this ABB positioner supports rotary actuators per VDI/VDE 3845. It works perfectly with the included mounting kit.

Q2: What happens during a loss of electrical power?
The V18345-2021421001 moves to its fail-safe position. This model uses double-acting fail-safe technology for safety.

Q3: Does this model support HART communication?
Yes, it includes a connector plug for an LKS adapter. It also mounts an FSK module for full HART protocol support.

Q4: How do I change the action from direct to reverse?
Use the local operator panel to change the signal action. Select reverse for 20-4 mA equals 0-100% position.

Q5: Is the device resistant to harsh industrial environments?
Yes, the aluminum IP65 / NEMA 4X case offers excellent protection. It resists dust, water jets, and corrosion effectively.