MODEL: 18KPR
Rack-mounted DCS Signal Conditioners 18K-RACK
[3] OPTIONS
Power Switch
blank: None
PULSE SCALER
Functions & Features
/S: With power switch
• Takes pulse measurements from turbine meters or
volumetric flowmeters and outputs in convenient
engineering unit
CAUTION
1) This unit's output waveform is not uniform due to its
• Module can be retracted without removing wiring for an
insulation test
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.
• Optional power switch
3) Use M-System’s Model M2PRU instead of this unit in
conjunction with the pulse output from M-System’s power
transducers.
R
C = 1 µF
R = 10kΩ
PULSE
SCALER
Relay
C
MODEL: 18KPR–[1][2]–R[3]
GENERAL SPECIFICATIONS
Construction: Rack-mounted; terminal access via screw
terminals on the front and connector on the rear; terminal
cover provided
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)
Connection
Input: M3.5 screw terminals (torque 0.8 N·m)
and connector
• Input Range (e.g. 0 - 356.7 Hz)
• Output Range (e.g. 0 - 1.00 Hz)
Output: M3.5 screw terminals (torque 0.8 N·m)
and connector
Power: Supplied from connector
[1] INPUT
1: Dry contact (max. 100 kHz)
Screw terminal: Nickel-plated steel
Isolation: Input to output to power
2: Voltage pulse (max. 100 kHz)
Input pulse sensing: Capacitor coupled; detecting pulse rise
Sensitivity adjustment: Single-turn screwdriver adjustment
(front); 25 mVp-p – 5 Vp-p
[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)
Scaling factor adjustment: 10-position rotary switch; 0.9999
× 10 – 0.0001 × 10–6
0
POWER INPUT
DC Power
R: 24 V DC
(Operational voltage range 24 V ±10 %, ripple 10 %p-p max.)
18KPR SPECIFICATIONS
ES-0460 Rev.1 Page 1/4
http://www.m-system.co.jp/