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8 slots I/O Expansion Unit with Modbus TCP protocol, communicable over Modbus RTU, Modbus TCP, Ethernet, RS-232.  Supports operating temperatures from -25 ~ +75°C


8 slots I/O Expansion Unit with Modbus TCP protocol, communicable over Modbus RTU, Modbus TCP, Ethernet, RS-232. Supports operating temperatures from -25 ~ +75°C

  Price:  $1,099.00  

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ET-87P4-MTCPET-87Pn-MTCP series is a Modbus TCP I/O expansion unit to expand I-87K series I/O modules over the Ethernet for industrial monitoring and controlling applications. It offers two Ethernet switch ports for daisy-chain topology. The daisy-chain feature allows ET-87Pn to connect in series to each other or other Ethernet devices. Users can easily simplify the cabling and save installation space with the feature.

It is designed to be used in harsh and noisy environments, so the hardware is manufactured with wide power input range (10 ~ 30 VDC), isolated power input and can operate under wide temperature range (-25 ~ +75°C). There are more than 50 I/O modules supported with the unit, including analog input/output, digital input/output, DI counter modules. To simplify installation and maintenance of I/O modules, it provides many useful features, such as: auto configuration, LED indicators for fault detection, dual watchdog to keep alive, programmable power on and safe values for safety.

Modbus is a very wide known protocol in the industrial manufacturing and environment monitoring fields. Many SCADA softwares, HMIs and PLCs have built in drivers to support Modbus devices. We also provide SDK on different platforms, such as Windows XP, Window CE 5.0/6.0, Linux, MiniOS7. Therefore, it is very easy to integrate remote I/O to customer’s applications.

  • Two Ethernet Ports for Daisy-Chain Topology
  • Supports Modbus TCP
  • Supports Modbus RTU/ASCII
  • Supports Modbus TCP to RTU Gateway
  • Auto Configuration
  • 4/8 I/O Slots for I-87K Series Modules
  • Operating Temperature: -25 ~ +75 °C


Models ET-87P4-MTCP ET-87P8-MTCP
Communication Ports
Protocol Modbus TCP Slave
Modbus RTU/ASCII Slave
Modbus TCP to RTU Gateway
Ethernet RJ-45 x 2, 10/100 Base-TX (Auto negotiating, Auto MDI/MDI-X, LED indicators)
COM 1 RS-232 (to update firmware) (RxD, TxD and GND); non-isolated
LED Display Yes, 5-Digit LED Display
Push Buttons 4
I/O Expansion Slots
Slot Number 4 8
Note: For High Profi I-87K Modules Only
Dimensions (W x L x H) 188 mm x 132 mm x 111 mm 312 mm x 132 mm x 111 mm
Installation DIN-Rail or Wall Mounting
Operating Temperature -25 ~ +75 °C
Storage Temperature -30 ~ +75 °C
Ambient Relative Humidity 5 ~ 95% RH (non-condensing)
Input Range +10 ~ +30 VDC
Isolation 1 kV
Redundant Power Inputs Yes
Capacity 30 W
Consumption 2 W 2.4 W

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