18PR-12-R

18PR MSYSTEM | Alldatasheet

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Technical content

MODEL: 18PR 18PR SPECIFICATIONS ES-1860 Rev.11 Page 1/4 http://www.m-system.co.jp/ Rack-mounted DCS Signal Conditioners 18-RACK PULSE SCALER Functions & Features

• Converting pulse rate into convenient engineering unit for display on a totalizing counter or meter Typical Applications
• Positive displacement flowmeters and turbine flowmeters
• Magnetic tachometers MODEL: 18PR–[1][2]–R

ORDERING INFORMATION

• Code number: 18PR-[1][2]-R Specify a code from below for each of [1] and [2]. (e.g. 18PR-11-R)
• Input frequency range (e.g. 0 – 356.7 Hz)
• Output frequency range (e.g. 0 – 1.00 Hz) [1] INPUT 1: Dry contact (max. 100 kHz) 2: Voltage pulse (max. 100 kHz) [2] OUTPUT 1: Open collector (max. frequency 20 kHz) 2: 5 V pulse (max. frequency 20 kHz) 3: Relay contact (max. frequency 2 Hz) 4: 24 V pulse (max. frequency 20 Hz) POWER INPUT DC Power R: 24 V DC (Operational voltage range 24 V ±10 %, ripple 10 %p-p max.) CAUTION 1) This unit's output waveform is not uniform due to its scaling method. The user must be aware that it may be inconvenient for certain types of application. 2) This unit is designed to accept at the maximum of 100 kHz, which may cause errors due to chattering in the input pulses. Use input relays which do not cause chattering (e.g. mercury relays). Other relays could be used only with a CR filter, for 10 Hz at maximum. 3) Use M-System’s Model M2PRU instead of this unit in conjunction with the pulse output from M-System’s power transducers. Relay R C PULSE SCALER C = 1 µF R = 10kΩ GENERAL SPECIFICATIONS Construction: Rack-mounted; terminal access via screw terminals on the front and connector on the rear; terminal cover provided Connection Input: M3.5 screw terminals (torque 0.8 N·m) Output: M3.5 screw terminals (torque 0.8 N·m) and connector Power input: Supplied from connector Screw terminal: Nickel-plated steel Isolation: Input to output to power Input pulse sensing: Capacitor coupled; detecting pulse rise Sensitivity adjustment: Single-turn screwdriver adjustment (front); 25 mVp-p – 5 Vp-p Scaling factor adjustment: 10-position rotary switch; 0.9999 × 100 – 0.0001 × 10–6

MODEL: 18PR 18PR SPECIFICATIONS ES-1860 Rev.11 Page 2/4 http://www.m-system.co.jp/ INPUT SPECIFICATIONS ■ Dry Contact: Mechanical contact or open collector Max. frequency: 100 kHz Pulse width time requirement: 5 μsec. min. (20 msec. min. for frequencies ≤ 10 Hz) Sensing: Approx. 7.5 V DC @ 1 mA ON/OFF level: ≤ 20 kΩ for ON, ≥ 100 kΩ for OFF ■ Voltage Pulse: Square or sine waveforms* Max. frequency: 100 kHz Pulse width time requirement: 5 μsec. min. (20 msec. min. for frequencies ≤ 10 Hz) Input amplitude: 25 mVp-p – 50 Vp-p Minimum amplitude requirement

• With duty ratio 50 ±10 % (frequency: amplitude) 0 – 2 kHz: 25 mVp-p 0 – 20 kHz: 50 mVp-p 0 – 40 kHz: 1 Vp-p 0 – 100 kHz: 5 Vp-p
• With duty ratio other than 50 ±10 % (pulse width: amplitude) 5 μsec.: 5 Vp-p 10 μsec.: 3.5 Vp-p 50 μsec.: 2 Vp-p 100 μsec.: 1 Vp-p 500 μsec.: 0.5 Vp-p Input impedance: 100 kΩ minimum 25mV – 50V 25mV – 50V 25mV p-p – 50V p-p 0V *Voltage pulse examples OUTPUT SPECIFICATIONS ■ Open Collector: 50 V DC @ 50 mA (resistive load) Frequency range: 0 – 20 kHz ON pulse width: Approx. 30 μsec. Saturation voltage: 0.6 V DC ■ Relay Contact: 120 V AC @ 200 mA (cos ø = 1)

240 V AC @ 100 mA (cos ø = 1)

24 V DC @ 200 mA (resistive load)

Maximum switching voltage: 240 V AC or 30 V DC Maximum switching power: 24 VA or 4.8 W Minimum load: 5 V DC @ 10 mA Frequency range: 0 – 2 Hz ON pulse width: Approx. 30 msec. Relay life: ≥ 5 × 107 cycles (mechanical) ≥ 105 cycles (electrical) ■ 5 V Pulse Frequency range: 0 – 20 kHz Low pulse width: Approx. 30 μsec. High level: 5 V ±10 % Low level: ≤ 0.5 V Load resistance: 600 Ω minimum ■ 24 V Pulse Frequency range: 0 – 20 Hz High pulse width: Approx. 30 msec. High level: 24 V ±10 % Low level: ≤ 0.5 V Load current: 30 mA max. Load resistance: 800 Ω minimum INSTALLATION Current consumption: Approx. 80 mA Operating temperature: -5 to +55°C (23 to 131°F) Operating humidity: 30 to 90 %RH (non-condensing) Mounting: Standard Rack 18BXx or 18KBXx Weight: 150 g (0.33 lb) PERFORMANCE Insulation resistance: ≥ 100 MΩ with 500 V DC Dielectric strength: 1500 V AC @ 1 minute (input to output or power)

500 V AC @ 1 minute (outut to power)

1500 V AC @ 1 minute (input or output or power to ground)

MODEL: 18PR 18PR SPECIFICATIONS ES-1860 Rev.11 Page 3/4 http://www.m-system.co.jp/ EXTERNAL VIEW 8 7 1 2 4 3 Sensitivity Adj. Connector Scaling Factor Adj. Digital Switches EXTERNAL DIMENSIONS unit: mm (inch) 110 (4.33 ) 93 (3.66) 24 (.94) 7 (.28) 78 (3.07)32 (1.26) 8–M3.5 SCREW 7 (.28) 2–M3 SCREW TERMINAL ASSIGNMENTS 1 2 3 4 7 8 5 6

MODEL: 18PR 18PR SPECIFICATIONS ES-1860 Rev.11 Page 4/4 http://www.m-system.co.jp/ SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM Isolation Pulse Volt. Amplifier Output Driver OUTPUT INPUT CONNECTOR SENSITIVITY ADJ. OUTPUT POWER Scaler One-Shot *Dry contact input only. +7.5V SCALING FACTOR ADJ. Specifications are subject to change without notice.