4-20mA Transmitter (Current) and
Moniteur VPTs can be supplied with current or resistive output that is used to determine the precise position of the valve. This output signal can be resistive (0-1000 ohm) or current (4-20 mA) and interfaces with most PLC and DCS systems such as HART, Device Net, ASI and others.
Moniteur incorporates state of the art potentiometers resistant to drift, vibration and environmental effects. As a result, feedback signals are more stable and consistent over time, resulting in accurate valve position indication.
Moniteur has also developed its own transmitter electronics for enhanced reliability and resistance to environmental effects. In addition, setting and adjusting the transmitter has been made simple with trimming pots located on the board.
Specifications – Current Output
| Specifications – Current Output | |
|---|---|
| Power Supply Rating | 10-38 VDC loop power |
| Recommended Power Supply | 24 VDC |
| Output Signal | 4-20 mA |
| Operating Temperature | -10 F – 145 F |
| Load Impedance | 0-1000 ohms |
| Maximum Output | 55 mA DC |
| Rotation Range | 0 – 105 degrees – min. 40 |
| Linearity | +/- 1.0% |
| Hysteresis | 0.55% of full scale |
| Repeatability | +/- 0.3% of full scale |
| Environmental Protection | conformal coating |
Specifications – Resistive Output
| Specifications – Resistive Output | |
|---|---|
| Standard Output | 1000 Ohms |
| Power Output @ 70 C | 1 watt |
| Contact Elements | plastic |
| Rotational Life (full load) | 200,000 cycles |
| Options | 50 or 10,000 ohm |
Applications
Critical valve position applications, computer interface, or trend analysis. The current or resistive output option provides precise valve position indication. A continuous analog signal in resistive or current form provides 0-100% readout of valve position.
Valve positioners and actuation equipment that require additional or independent feedback signals.
Additional monitoring of valve end-position. Up to two mechanical or non-contact switches, or inductive sensors can be provided in the same enclosure with the current or resistive output electronics.