MODEL: PRP-2

PRP-2 SPECIFICATIONS

ES-4875 Rev.1 Page 2/4

http://www.m-system.co.jp/

•Restart limiting timer

•Closed/open side limiter

•Resolution

INPUT SIGNAL SPECIFICATIONS

■ DC Current: Input resistor incorporated (not removable)

■ Forced Operation: External contact signal input terminals

provided for compulsory opening or closing operation

Rating: 5 V DC @ 2.5 mA

OUTPUT SIGNAL SPECIFICATIONS

■ Position Signal: 4 – 20 mA DC

Load resistance: ≤ 300 Ω

• Sequential Control Signal: "Full-open", "full-closed" and

"alarm"

Open collector: 30 V DC @ 100 mA max.

Saturation voltage: 1 V DC

INSTALLATION

Power consumption: 180 VA

Stand-by consumption: 30 VA

Operating temperature: -20 to +55°C (-4 to +131°F)

Operating humidity: 30 to 85 %RH (non-condensing)

Vibration: Passed test condition below

•Fixed frequency endurance test

Frequency: at resonant frequency

Endurance: 30 min.

Direction: X, Y, Z

•Sweep endurance test

Frequency: 10 to 1000 Hz

Cycle: 20 cycles

Rate: 1 oct./min.

Endurance: approx. 4 hr. 30 min.

Direction: X, Y, Z

Mounting position: All directions

Prevent water from accumulating around the output stem.

Weight: Approx. 26.5 kg (58.42 lb)

PERFORMANCE

Insulation resistance: ≥ 100 MΩ with 500 V DC (signals to

power supply voltage to sequential signals to metallic

housing)

Dielectric strength:

• 2000 V AC @ 1 minute

- power supply voltage to sequential signals

• 500 V AC @ 1 minute

- signals to metallic housing

* Short between signals and metallic housing

FUNCTIONS

• Error Detection

When the position signal is deviated from the input signal

but the output stem is stuck due to overload or certain

malfunction, the PRP repeats starting the motor at the

maximum torque for several times.

If the stem is still stuck after that, the PRP outputs an alarm

signal (LED turned ON) and stops power supply to the

motor.

In order to reset the PRP, apply several times 0% and 100%

input signals in turn, or turn off and on the power supply.

• Abnormal Temperature Increase Protection

When the incorporated temperature sensor detects an

abnormal temperature increase in the motor, the alarm LED

blinks (repeating 0.5-sec. ON – 0.5-sec. OFF) and the power

supply to the final control element motor is stopped until

the temperature decreases to an acceptable level. The PRP

is designed to resume automatically power supply to the

motor. It takes longer to resume normal operation when

ambient temperature is higher.

• Restart Limiting Timer

This unit is equipped with a timer protecting the motor from

overheating. The timer prevents the motor from restarting

for a certain interval once the motor has been stopped

within deadband.

When the high temperature protection is activated in a high

temperature ambient, adjust the timer to a longer interval.

• Motor Preheat Function

When this unit detects a temperature lower than 0°C or

32°F (approximate) on the surface of its motor, this unit

supplies current to the motor in order to warm up and

maintain its surface temperature at 5°C or 41°F

(approximate).

Maintain the power-supply voltage ON when this unit is

used in the ambient temperature below 0°C or 32°F.

• Resolution

The ratio that the stem of the unit rotates according to input

signal.

E.g. Resolution is 1/300 for the specification that input

signal is 4 to 20 mA, output stem 90°, direct or reverse

action. As the span of input signal is 16 mA (20 – 4 =

16 mA), when input signal is changed by 0.053 mA step (16

mA / 300 = 0.053 mA), the output stem rotates 0.3° (90°/

300 = 0.3°).

(Even for output stem 60°setting, resolution is 1/300 =

0.3°step)

It is not true that input signal = output signal.

(Not input signal 4.00 mA DC = output signal 4.00 mA DC,

there is difference around ±0.012 mA DC.)