Data Acquisition


  • 8 Up Counter/Frequency or 4 Encoder Inputs
  • Programmable Digital Filter
  • Supports 32-bit Counter
  • Individual Channel Configuration
  • Built-in Virtual Battery Backup to Preserve Counter Values
  • Preset Values for Counter Input


The M-7084 is a 32-bit high-speed Counter/Frequency/Encoder input module that offers a variety of mode options, including "Up Counter”, "Frequency Input", "Up/Down Counter", "Direct/Pulse Counter" and "A/B Phase Counter" modes. The mode combinations can be individually set for all 8 channels, where some channels can be set to “Up Counter” mode and other channels can be simultaneously set to “Frequency Input”, "Up/ Down Counter" or “Encoder input” mode. The built-in digital filter can filter out noise where the high/ low pulse width is smaller than the minimum high/low width of the digital filter. The M-7084 provides a virtual battery backup function in counter mode.


• Counter Measurement
• Frequency Measurement and Encoder Motion Control


 CPU Module
 Watchdog Timer Module, Communication (Programmable)


Battery Backup Yes


 Intra-module Isolation 3750 VDC


 EMS Protection
 EFT (IEC 61000-4-4) ±2 kV for Power Line
 ESD (IEC 61000-4-2) ±4 kV Contact for Each Terminal
 Surge (IEC 61000-4-5) ±3 kV for Power Line


 LED Indicators
 Status 1 x Power and Communication


 Counter/Frequency/Encoder Input
 Channels 4-channel Up/Down Counter (CW/CCW)
4-channel Dir/Pulse Counter (Bi-direction)
4-channel A/B Phase (Quadrature Counting)
8-channel Up Counter
8-channel Frequency
 Type Counter, Frequency, or Encoder
 Counter Mode Up or Up/Down
 Encoder Mode CW/CCW, Dir/Pulse, AB Phase
 Frequency Mode Yes
 Counter/Encoder Bits 32-bit
 Sink/Source (NPN/PNP) Sink
 ON Voltage Level +3.5 VDC ~ +30 VDC
 OFF Voltage Level +1 VDC Max.
 Frequency Accuracy 1 Hz ~ 200 kHz = ±0.025% of Input Frequency (*Note1)
 Individual Channel Configuration Yes
 Max. Speed +3.5 ~ +10 VDC: 200 kHz
+10 ~ +30 VDC: 150 kHz
 Low Pass Filter 1 ~ 32767 μs


 COM Ports
 Ports 1 x RS-485
 Baud Rate 1200 ~ 115200 bps
 Data Format (N, 8, 1), (N, 8, 2), (E, 8, 1), or (O, 8, 1)
 Protocol Modbus RTU, DCON


 Reverse Polarity Protection Yes
 Input Range +10 ~ +30 VDC
 Consumption 1.32 W Max.


 Dimensions (mm) 72 x 123 x 35 (W x L x H)
 Installation DIN-Rail Mounting


 Operating Temperature -25 ~ +75 °C
 Storage Temperature -40 ~ +85 °C
 Humidity 10 ~ 90% RH, Non-condensing