home > product> solutions > remote i/o modules/units > I-7000 & M-7000 > I-7051(D)/M-7051(D)
16-channel Isolated Digital Input Module
Model: I-7051(D) Model: M-7051(D)
  • 16-Channel Digital Input
  • Dry Contact and Wet Contact Selectable via Wire Connections
  • Photocouple Isolation
  • Long Distance Measurement
  • All Channels can be used as 16-bit Counters
  • ±4 kV ESD Protection
  • ±4 kV EFT Protection
  • ±3 kV Surge Protection
  • 3750 VDC Isolation Voltage
  • Dual Watchdog
  • Wide Operating Temperature Range: -25 ~ +75°C
The I-7051 offers 16 channels for digital input, catering for both dry and wet contact, with an effective distance for dry contact of up to 500 meters. All channels not only feature Photocouple isolation, but can also be used as 16- bit counters. The I-7051D has 16 LED indicators that can be used to monitor the status of the digital input channels. 4 kV ESD protection and 3750 VDC intra-module isolation are standard. The M-7051 has the same hardware specifications as the I-7051, but provides additional support for the Modbus RTU protocol as well as the DCON protocol.
Building Automation, Factory Automation, Machine Automation, Remote Maintenance, Remote Diagnosis, Testing Equipment.
Model I-7051 I-7051D M-7051 M-7051D
Digital Input/Counter
Channels 16
Type Dry Contact Source
Wet Contact Sink/Source
Wet Contact On Voltage Level +10 ~ 50 VDC
Off Voltage Level +4 VDC Max.
Dry Contact On Voltage Level Close to GND
Off Voltage Level Open
Effective Distance
for Dry Contact
500 m Max.
Counters Max. Count 65535 (16-bit)
Max. Input
100 Hz
Min. Pulse Width 5 ms
Input Impedance 10 KΩ
Channel-to-Channel Isolation -
Overvoltage Protection ±70 VDC
Model I-7051 I-7051D M-7051 M-7051D
Interface RS-485
Bias Resistor No (Usually supplied by the RS-485 Master. Alternatively, add a tM-SG4 or SG-785.)
Format (N, 8, 1), (N, 8, 2), (E, 8, 1), (O, 8, 1)
Baud Rate 1200 ~ 115200 bps
Protocol DCON Modbus RTU, DCON
Dual Watchdog Yes, Module (1.6 Seconds), Communication (Programmable)
LED Indicators/Display
System LED Indicator Yes, 1 LED as Power/Communication Indicator
I/O LED Indicators - Yes, 16 LEDs as Digital Input Indicators - Yes, 16 LEDs as Digital Input Indicators
7-Segment LED Display -
Intra-Module Isolation, Field-to-Logic 3750 VDC
EMS Protection
ESD (IEC 61000-4-2) ±4 kV Contact for each Terminal
±8 kV Air for Random Point
EFT (IEC 61000-4-4) ±4 kV for Power Line
Surge (IEC 61000-4-5) ±3 kV for Power Line
Reverse Polarity Protection Yes
Input Range 10 ~ 30 VDC
Consumption 0.3 W 1.1 W 0.3 W 1.1 W
Dimensions (W x L x H) 72 mm x 123 mm x 35 mm
Installation DIN-Rail or Wall Mounting
Operating Temperature -25 ~ +75°C
Storage Temperature -40 ~ +85°C
Humidity 10 ~ 95% RH, Non-condensing
I-7051 CR 16-channel Isolated Digital Input Module with DCON Protocol (Blue Cover) (RoHS)
I-7051-G CR 16-channel Isolated Digital Input Module with DCON Protocol (Gray Cover) (RoHS)
I-7051D CR I-7051 with LED Display (Blue Cover) (RoHS)
I-7051D-G CR I-7051-G with LED Display (Gray Cover) (RoHS)
M-7051-G CR 16-channel Isolated Digital Input Module with DCON and Modbus Protocols (Gray Cover) (RoHS)
M-7051D-G CR M-7051-G with LED Display (Gray Cover) (RoHS)
tM-7520U CR RS-232 to RS-485 converter (RoHS)
tM-7561 CR USB to RS-485 converter (RoHS)
tM-SG4 CR RS-485 Pull-high/Pull-low and Termination Resistor Module (RoHS)
I-7514U CR 4-channel RS-485 Hub (RoHS)
SG-770 CR 7 channel differential or 14 channel single-ended surge protector (RoHS)
SG-3000 series Signal Conditioning Modules for Thermocouple, RTD, DC Voltage, DC Current and Power Input transformers

oӭWeݭns Adobe Flash PlayerC

o Adobe Flash Player