Valve feedback assistance needed

What is output are high and low voltage levels, rather than the traditional on/off signals; please check the NAMUR signals...

Introduction to Direct-acting Multi-turn Valve Electric Actuators I. Direct-acting multi-turn valve electric actuators, also known as electrically open type multi-turn valve electric actuators, use 4-20mA signals; a 4mA signal corresponds to the valve being closed, while a 20mA signal corresponds to the valve being open. It features a 4-20mA output signal and explosion-proof capabilities. The electrical equipment in this series features comprehensive functions, reliable performance, advanced control systems, small size, light weight, and ease of use and maintenance. The valves can be controlled remotely, centrally, and automatically. It is widely used in industries such as electricity, metallurgy, petroleum, chemicals, papermaking, and sewage treatment. II. Working Environment and Main Technical Parameters Power supply: Standard, three-phase 380V (50Hz); Special, three-phase 660V, 415V (50Hz, 60Hz) ； Single-phase 220V, 110V (50Hz, 60Hz). Operating environment: Ambient temperature: -20~+60°C (for special orders: -40~+80°C). Relative humidity: ≤95% (at 25°C). III. Overall adjustment type: By introducing an adjustment system on the basis of the overall type, an overall adjustment type electric device is formed; its electrical components include an adjustment module, a button box, an opening gauge (or digital display), contactors, etc. It can receive and output 4~20mA standard signals.

This should be a voltage signal; check P+F’s product manual – it’s likely a Namur signal

Check for continuity; both sets of wires are connected to either normally open or normally closed configurations, and the contacts can be adjusted via an intermediate cam to achieve one state of connection and one state of disconnection

These are all digital-type feedback signals; in the control room, different voltage levels or ranges are defined as 0 and 1 based on the monitored voltage values； An analog signal is a continuous signal output based on the valve stroke.

It’s not clear from the module; there should be an explanation on it. Are they two modules that are installed one on top of the other, or is it a single composite module? It should be a proximity magnetic switch; the red part of the valve stem is close to the module. When the valve moves and the green part of the valve stem protrudes, that part will come close to the upper section of the feedback module. For the NUMAR signal, measure the high and low voltage levels (4V, 8V)

This is a digital feedback signal that confirms whether the valve has been opened or closed properly.

It’s just a normal valve feedback. Outputs a switch signal; two cams, corresponding to two mechanical limit switches.

This post was last edited by HEJIYUER on 2020-6-6 22:11: NJ2- V3-N N= NAMUR control rooms require safety barriers (signal amplifiers)