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  


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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