Data Acquisition


  • Source-type Digital Output with Overload Protection
  • Digital Input Channels Can be Used as 16-bit Counters
  • Short Circuit Protection
  • Configurable Power-on Value and Safe Value Settings


The M-7055/M-7055D offers 8 isolated channels for digital input and 8 isolated channels for digital output. Either sink- or source-type inputs can be selected via wire connections. All digital input channels are also able to be used as 16-bit counters. The M-7055(D) supports source-type output with short circuit protection. The M-7055D has 16 LED indicators for channel status monitoring. The M-7055(D) supports Modbus RTU and DCON protocols, which can be configured via software. There are also options for configuring power-on and safe values. 4 kV ESD protection and 3750 VDC intra-module isolation are standard, and all hardware specifications are the same as the I-7055(D).


• Building Automation
• Factory Automation
• Machine Automation
• Remote Maintenance
• Remote Diagnosis
• Testing Equipment


 CPU Module
 Watchdog Timer Module, Communication (Programmable)


 Type I/O LED Indicator


 Intra-module Isolation 3750 VDC


 EMS Protection
 EFT (IEC 61000-4-4) ±4 kV for Power Line
 ESD (IEC 61000-4-2) ±4 kV Contact for Each Terminal
±8 kV Air for Random Point
 Surge (IEC 61000-4-5) ±3 kV for Power Line


 LED Indicators
 Status 1 x Power and Communication
8 x Digital Input
8 x Digital Output


 Digital Input/Counter
 Channels 8
 Type Dry Contact,
Wet Contact
 Sink/Source (NPN/PNP) Sink/Source
 ON Voltage Level Dry: Close to GND
Wet: +10 ~ +50 VDC
 OFF Voltage Level Dry: Open
Wet: +4 VDC Max.
 Max. Counts 65535 (16-bit)
 Frequency 100 Hz
 Min. Pulse Width 5 ms
 Effective Distance 500 m Max.
 Input Impedance 10 kΩ
 Overvoltage Protection ±70 VDC


 Digital Output
 Channels 8
 Type Open Source
 Sink/Source (NPN/PNP) Source
 Load Voltage +10 ~ +40 VDC
 Load Current 650 mA/Channel
 Overvoltage Protection 47 VDC
 Overload Protection 1.4 A
 Short-circuit Protection Yes
 Power on Value Programmable
 Safe Value Programmable


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


 Reverse Polarity Protection Yes
 Input Range +10 ~ +30 VDC
 Consumption 1.6 W


 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 ~ 95% RH, Non-condensing



 M-7055D-G     CR  8-ch Isolated (Dry, Wet) DI and 8-ch Isolated (Source, PNP, 10~40 VDC) DO Module with LED Display, using DCON and Modbus Protocols (Gray Cover) (RoHS) 1