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RS-485 Based Remote Intelligent I/O Expansion Unit with 1 Slot


RS-485 Based Remote Intelligent I/O Expansion Unit with 1 Slot

  Price:  $419.00  

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.


RU-87Pn series is a remote intelligent I/O expansion unit to expand I-87K series I/O modules over the RS-485 for industrial monitoring and controlling applications.

RU-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.

There are more than 30 I/O modules supported with the unit, 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 RU-87Pn can be easily integrated into variant software system.


  • One RS-485 Port for Multi-Drop Topology
  • I/O Module Hot Swap
  • Auto Configuration
  • LED Indicators for Fault Detection
  • Switches to Configure Communication
  • DCON Protocol
  • 1/2/4/8 I/O Slots for I-87K Modules
  • Operating Temperature: -25 ~ +75 °C




Interface Type (RS-485)
Baud rate 115200 bps maximum
Distance 1.2 Km (4000 ft) maximum
Isolation 3000 VDC
ESD Protection +/- 4K Contact Discharge and +/- 8K Air Discharge
Communication Protocol DCON Protocol (ASCII format)
Rotary Switch x2 , For RS-485 address
DIP Switch 8 bit *1, For auto configuration, check sum and baud rate
LED Indicators
Power Yes
System Ready Yes
Auto configuration Yes
Slot Status Yes
I/O Expansion Slots
Hot Swap Yes
Auto Configuration Yes
Support Module Type High profile I-87K module only
RU-87P1 1
RU-87P2 2
RU-87P4 4
RU-87P8 8
Dimensions (W x H x D)
RU-87P1 64 x 120 x 110 mm
RU-87P2 95 x 132 x 111 mm
RU-87P4 188 x 132 x 111 mm
RU-87P8 312 x 132 x 111 mm
Input Range 10 ~ 30 VDC (non-regulated)
Reverse polarity protection Yes
Isolation 1000 VDC
Frame Ground Yes
  Consumption Power Board Driving
RU-87P1 1 W 5 W
RU-87P2 1 W 8 W
RU-87P4 2 W 30 W
RU-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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