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4 Slots I/O Expansion Unit with 2 10/100 Base TX RJ-45 Ethernet ports.  Din rail mountable.  Supports daisy chain Ethernet cabling.  Supports operating temperatures of -25 ~ +75C


4 Slots I/O Expansion Unit with 2 10/100 Base TX RJ-45 Ethernet ports. Din rail mountable. Supports daisy chain Ethernet cabling. Supports operating temperatures of -25 ~ +75C

  Price:  $879.00  

Fastest Delivery: (Details) X Delivery Details
We ship via UPS and fastest delivery is with Next Day Air. UPS Next Day Air Early typically gets their product to them as early as 8am, Next Day Air gets their product typically there by 10:30am and Next Day Air Saver typically by 3pm. We ship same day for in stock items and the lead time is up to one week for out of stock items. Delivery is dependent on UPS and your shipping method.


ET-87PnET-87Pn series is a remote intelligent 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 to form a daisy-chain topology. The daisy-chain feature allows ET-87Pn to connect in series to each other or other Ethernet devices. Uses can easily simplify the cabling and save installation space with the feature.

ET-87Pn is designed to be used in harsh and noisy environment, so the hardware is manufactured with wide power input range (10 ~ 30 VDC), isolated power input and can operate under wide temperature (-25 °C ~ +75 °C). To simplify installation and maintenance of I/O modules, it provides many useful features, such as: hot swap allowed, auto configuration, LED indicators for fault detection, dual watchdog to keep alive, programmable power on and safe values for safety.

The unit supports more than 30 I/O modules including analog input/output, digital input/output, counter, frequency I/O modules. We provide various software development kits (SDK) and demos, such as DLL, ActiveX, Labview driver, InduSoft driver, Linux driver, OPC server, etc. The I-87K series I/O modules plugged in the ET-87Pn can be easily integrated into variant software system.


  • Two Ethernet Ports for Daisy-Chain Topology
  • I/O Module Hot Swap
  • Auto Configuration
  • LED Indicators for Fault Detection
  • Push Buttons to Configure IP Address
  • DCON Protocol
  • 4/8 I/O Slots for I-87K Modules
  • Operating Temperature: -25 ~ +75 °C


Interface Type: Ethernet
Port RJ45*2
(Auto-negotiating, Auto MDI/MDI-X, LED indicators)
Cabling Daisy-Chain Ethernet Cabling
Isolation 3000 VDC
ESD Protection +/- 4K Contact Discharge and +/- 8K Air Discharge
Communication Protocol DCON Protocol (ASCII format)
LED Indicators
Power Yes
System Ready Yes
Auto configuration Yes
Slot Status Yes
IP Address Yes (with push buttons to configure IP address)
I/O Expansion Slots
I/O Module Hot Swap Yes
Auto Configuration Yes
Support Module Type High profile I-87K module only
ET-87P4 4
ET-87P8 8
Dimensions (W x H x D)
ET-87P4 188 mm x 132 mm x 111 mm
ET-87P8 312 mm x 132mm x 111 mm
Input Range 10 ~ 30 VDC (non-regulated)
Redundant Input Yes
Reverse polarity protection Yes
Isolation 1000 VDC
Frame Ground Yes
  Consumption Power Board Driving
ET-87P4 2 W 30 W
ET-87P8 2.4 W 30 W
Operating Temperature -25 ~ +75 °C
Storage Temperature -30 ~ +75 °C
Humidity 5 ~ 95%, Non-condensing

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