ES-1861 Rev.8

18PP

Rack-mounted DCS Signal Conditioners 18-RACK

PULSE ISOLATOR

Functions & Features
• Galvanically isolating pulse rate signals
• Input frequency = output frequency
• Second channel output available at the front terminals and at the Standard Rack connector
• Excitation
Typical Applications
• Isolating field pulse signals in order to reduce noises

MODEL: 18PP–[1]22–R

ORDERING INFORMATION

• Code number: 18PP-[1]22-R
Specify a code from below for [1].
  (e.g. 18PP-322-R)

[1] INPUT

1: Mechanical contact (max. 5 Hz)
2: Open collector (max. 10 kHz)
3: Voltage pulse (max. 10 kHz)
4: Two-wire current pulse, receiving resistor 200 Ω 
   (max. 10 kHz)
5: Two-wire current pulse, receiving resistor 510 Ω 
   (max. 10 kHz)
6: Two-wire current pulse, receiving resistor 1 kΩ 
   (max. 10 kHz)

OUTPUT 1

2: Open collector (max. 10 kHz)

OUTPUT 2

2: Open collector (max. 10 kHz)
(Output 1 and 2 frequency is equal)

POWER INPUT

DC Power
R: 24 V DC
(Operational voltage range 24 V ±10 %, ripple 10 %p-p max.)

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 1: Connector
  Output 2: 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 1 to output 2 to power
Frequency range: Input and output are the same.
Chattering protection: Filter provided for mechanical contact input

INPUT SPECIFICATIONS

Excitation: 12 V DC ±10 % @ 40 mA; shortcircuit protection
■ Open Collector
Input pulse sensing: DC coupled
Pulse width time requirement: ≥ 20 μsec. for ON and OFF
Sensing: Approx. 12 V DC @ 3 mA
ON/OFF level: ≤ 200 Ω / 5 V for ON, ≥ 100 kΩ / 7 V for OFF
■ Mechanical Contact
Input pulse sensing: DC coupled
Pulse width time requirement: ≥ 20 msec. for ON and OFF
Sensing: Approx. 12 V DC @ 3 mA
ON/OFF level: ≤ 200 Ω / 5 V for ON, ≥ 100 kΩ / 7 V for OFF
Time constant: 10 msec. (able to cancel it by changing jumper, J6)
■ Voltage Pulse: Square or sine waveform
Input pulse sensing: AC coupled
Input impedance: ≥ 10 kΩ
(Refer the graph and tables below for waveform, detection level range, the minimum amplitude, pulse width (duty ratio) and frequency requirements)
■ Two-wire Current Pulse
Input pulse sensing: AC coupled
Refer to the table above for the minimum amplitude, pulse width (duty ratio) and frequency requirements.
Convert the current to the voltage for the amplitude.

OUTPUT SPECIFICATIONS

Open collector
Rating: 30 V DC @ 100 mA (resistive load)
Maximum frequency: 10 kHz
Saturation voltage: 0.5 V DC

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 1 or output 2 or power)
500 V AC @ 1 minute
(output 1 to output 2 to power)
1500 V AC @ 1 minute
(input or output or power to ground)

EXTERNAL DIMENSIONS unit: mm [inch]

TERMINAL ASSIGNMENTS

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM