Model: I-87084W

4/8-channel Counter/Frequency/Encoder Module

I-87084W-G is a 32 bits hardware high speed Counter/Frequency/Encoder Input Module with "Up Counter¡¨¡B"Frequency"¡B "Up/Down Counter"¡B "Dir/Pulse Counter" and "A/B Phase Counter" mode.

I-87084W-G can has variety mode combination for all 8 channels. That means it can use some channels as ¡§Up Counter¡¨ and others as "Frequency" or "A/B Phase".
  • Support 8 Up Counter.
  • Support 8 Frequency.
  • Support 4 Up/Down.
  • Support 4 Dir/Pulse Counter.
  • Support 4 A/B Phase Counter.
  • Support 1~32767 (us) digital filter.
  • Support isolated and non-isolated input signals.
  • Equip with Power and Input signal LED indicators.
  Counter measurement, Frequency measurement and Encoder motion control.  


Digital Input
Model Counter & Frequency 4-ch Up/Down Counter (CW/CCW)
4-ch Dir/Pulse Counter (Bi-direction)
4-ch A/B Phase (Quadrant Counting)
8-ch Up Counter
8-ch Frequency
Digital Noise Filter 1 ~ 32767 £gs
Isolated Input Level On Voltage Level +3.5 VDC ~ +30 VDC
Off Voltage Level +1 VDC Max.
TTL Input Level On Voltage Level +2 VDC ~ +5 VDC
Off Voltage Level 0 VDC ~ +0.8 VDC
Input Frequency TTL Mode:
1 Hz ~ (typically) 500 kHz (both counter mode and frequency mode)
(where 500 kHz is calculated as followings: supposed that duty cycle = 50%, refer to Minimum Pulse Duration of High Level, we have pulse period = 1 £gs x 2 = 2 £gs, which is 500 kHz as a maximum)
Isolated Mode:
3.5~ 10V: 1Hz ~ (typically) 200kHz
10V ~ 30V: 1Hz ~ (typically) 150kHz
Maximum Frequency :
refer to Minimum Pulse Duration of High Level, maximum frequency is highly affected by duty cycle
Frequency Accuracy = ¡Ó 0.4 %
Isolated Voltage 2000 VDC
ESD Protection 4 kV (Contact for each channel)
Dual Watchdog Yes, Module(1.6 sec) and Communication(Programable)
LED Display
1 LED as Power Indicator
8 LEDs as Digital Input Indicators
Power Consumption 0.6 W
Operating Temperature -25 ~ 75 ¢XC
Storage Temperature -30 ~ 75 ¢XC
Humidity 5 ~ 95% RH, non-condensing
30mm x 102mm x 115mm((W x L x H)Detail
I-87084W-G CR    4/8-channel Counter/Frequency/Encoder Module (Gray Cover) (RoHS)
Converters    USB, RS-232, Fiber Optical to RS-485 Converters and Repeaters
Power Supply    24 VDC power supply
Relay Module    External relay modules for I-7000 DO module
Learning Kit    Beginner learning kit
Application Books    Application books designed with our products
Data Logger Software    User friendly data logger software (free)
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