The DRI-PT is a DIN rail mount, potentiometer input signal conditioner with 1800 Vdc isolation between AC power and the input/output circuitry. The input provides a constant voltage and is designed to accept any 3-wire potentiometer from 100 Ω to 100 kΩ. The field configurable output is switch selectable providing a 0 to 5V, 0 to 10V, 0 to 1 mA, 0 to 20 mA or 4 to 20 mA DC signal.
Wide ranging, precision zero and span pots, used in conjunction with DIP switches, allow 80% adjustablity of offset and gain to transmit a full scale output from any 20% portion of the potentiometer input.
The DRI-PT is useful in transmitting process control setpoints to remote PID controllers or interfacing position or level sensors to data acquisition and control systems. The high density DIN rail mounting offers an extremely compact solution for saving valuable panel space.
In a valve positioning application a potentiometer is sometimes used as a feedback signal. Quite often a wide open valve is only a 25% turn of the feedback potentiometer. The DRI-PT can easily be adjusted with the zero and span to provide a full scale output signal (e.g. 4 to 20 mA) representing 0 to 25% or even 50 to 75% of the potentiometer input.
The factory default configuration for the DRI-PT is as follows:
Input Range: 0 to 100% Output: 4 to 20 mA
Specifications POTENTIOMETER INPUT End-to-End Resistance: 100 Ω up to 100 kΩ Input Impedance: >1 MΩ Input Excitation: 500 mV, 5 mA maximum drive Zero Turn-Up: 80% of full scale input Span Turn-Down: 80% of full scale input Common Mode Rejection: 1800 Vdc (input to power)
OUTPUT Voltage Output: Range: 0 to 5V, 0 to 10V (dip-switch selectable) Source Impedance: <10 Ω Drive: 10 mA max (1 kΩ min @ 10V) Current Output: Range: 0 to 1 mA, 0 to 20 mA, 4 to 20 mA (dip-switch selectable) Source Impedance: >100 kΩ Compliance: 0 to 1 mA: 7.5V max (7.5 kΩ max) 0 to 20 mA: 12V max (600 Ω max) 4 to 20 mA: 12V max (600 Ω max) Accuracy (Including Linearity, Hysteresis): ±0.1% maximum at 25°C Temperature Stability: <±0.05%/°C maximum of full scale range Response Time (10 to 90%): <200 msec, typical Common Mode Rejection: 120 dB @ DC, >100 dB @ 60 Hz Isolation: 1800 Vdc between line power and input, output LED Indication (Green): Active DC power Humidity (Non-Condensing): Operating: 15 to 95% RH @ 45°C (113°F) Soak: 90% RH for 24 hours @ 65°C (149°F) Temperature Range: Operating: 0 to 55°C (32 to 131°F) Storage: -25 to 70°C (-13 to 158°F) Power: 100 to 240 Vac, ±10%, 50 to 400 Hz; 1.5 W typical, 2.5 W max Weight: 218 g (0.48 lb)