MODEL: 18KPR

18KPR SPECIFICATIONS

ES-0460 Rev.1 Page 1/4

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

Rack-mounted DCS Signal Conditioners 18K-RACK

PULSE SCALER

Functions & Features

• Takes pulse measurements from turbine meters or

volumetric flowmeters and outputs in convenient

engineering unit

• Module can be retracted without removing wiring for an

insulation test

• Optional power switch

MODEL: 18KPR–[1][2]–R[3]

ORDERING INFORMATION

• Code number: 18KPR-[1][2]-R[3]

Specify a code from below for each [1] through [3].

(e.g. 18KPR-11-R/S)

• Input Range (e.g. 0 - 356.7 Hz)

• Output 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.)

[3] OPTIONS

Power Switch

blank: None

/S: With power switch

CAUTION

1) This unit's output waveform is not uniform due to its

scaling method.

2) 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)

and connector

Output: M3.5 screw terminals (torque 0.8 N·m)

and connector

Power: 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