Product Overview

The V18345-1011121001 belongs to the ABB TZIDC series. This electro-pneumatic positioner is intelligent and fully configurable. It includes a clear indicator and an operator panel. The device mounts easily on linear or rotary actuators. This model uses a single acting fail-safe mechanism.

Technical Specifications

The V18345-1011121001 operates on a 4-20 mA input signal. This two-wire device includes an LKS adapter for communication. The housing uses an aluminum case with IP65 protection. It also meets NEMA 4X standards. There is no mechanical indicator on this version.

The explosion protection rating is ATEX Ex II 2 G EEx ib II C T6. This makes the V18345-1011121001 suitable for hazardous areas. The action type is single acting with fail-safe functionality. Electrical connections use a 1/2-14 NPT thread. Air connections use a 1/4-18 NPT thread.

This ABB positioner includes a plug-in module for analog feedback. The feedback signal range is 4-20 mA on a two-wire loop. The standard design ensures broad compatibility. The total weight is 1.7 kg (3.75 lb).

Pneumatic and Performance Data

The V18345-1011121001 requires instrument air free of oil and water. This air must meet DIN/ISO 8573-1 standards. The maximum particle size is 5 µm. The maximum oil concentration is 1 mg/m³. The pressure dew point must be 10 K below operating temperature.

Supply pressure ranges from 1.4 to 6 bar (20 to 90 psi). Never exceed the actuator’s maximum operating pressure. Air consumption stays below 0.03 kg/h or 0.015 scfm. This low consumption is independent of supply pressure.

The characteristic deviation is ≤ 0.5%. The tolerance band adjusts from 0.3% to 10%. The dead band adjusts from 0.1% to 10%. The A/D conversion resolution exceeds 4000 steps. The sample rate is 20 msec.

Environmental Resistance for V18345-1011121001

The V18345-1011121001 handles ambient temperature changes well. The influence is ≤ 0.5% for every 10°C change. Vibration influence stays at ≤ ±1% up to 10 g and 80 Hz. This ABB positioner meets seismic requirements per DIN/IEC 68-3-3 Class III. This includes protection against strong and strongest earthquakes. Mounting orientation has no effect on performance.

Signal and Characteristic Options

The output responds to increasing or decreasing signals. An increasing 0-100% signal increases output pressure OUT1. An increasing signal can also decrease output pressure OUT1 depending on configuration. The action can be direct or reverse. Direct means 4-20 mA equals 0-100% position. Reverse means 20-4 mA equals 0-100% position.

The characteristic curve is highly flexible. You can choose linear or equal percentage 1:25. Other options include 1:50, 25:1, or 50:1. You can also configure a custom curve with 20 reference points.

Installation Guidelines

Mount the V18345-1011121001 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 electrical cable using the 1/2-14 NPT thread. Apply supply pressure between 1.4 and 6 bar only. Check that the instrument air meets DIN/ISO 8573-1 standards. Verify the fail-safe position before starting operation. Connect the 4-20 mA loop correctly for two-wire operation.

Package List

• 1 x ABB V18345-1011121001 TZIDC Positioner

• 1 x Operator panel with indicator

• 2 x Thread adapters for air connections

• 1 x Mounting kit for linear actuators

• 1 x LKS adapter for communication

• 1 x Product quick start manual

Frequently Asked Questions (FAQ)

Q1: Can the V18345-1011121001 work without a mechanical indicator?
Yes, this version has no mechanical indicator. The digital operator panel shows the exact position values.

Q2: What type of air quality does this ABB positioner require?
The V18345-1011121001 needs clean, dry instrument air per DIN/ISO 8573-1. Oil content must stay below 1 mg/m³.

Q3: Is this model suitable for earthquake-prone areas?
Yes, it meets DIN/IEC 68-3-3 Class III requirements. This covers both strong and strongest seismic activity.

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

Q5: What happens if the supply pressure exceeds 6 bar?
Do not exceed 6 bar supply pressure. Higher pressure may damage the internal components or the connected actuator.