Data Acquisition


• One RS-485 Port for Multi-Drop Topology
• Hot Swap Allowed
• Auto Configuration
• LED Indicators for Fault Detection
• Switches to Configure Communication
• DCON Protocol (ASCII-based protocol)
• 8 Slots for I-87K Modules
• Operating Temperature: -25 ~ +75 °C


RU-87P8 is a remote intelligent I/O expansion unit that used to expand I-87K series I/O modules over the RS-485 for industrial monitoring and controlling applications. There are more than 50 I/O modules supported with the unit, including analog input/output, digital input/output, and counter/frequency I/O modules.

RU-87P8 is designed to be used in harsh and noisy environment, so the hardware is manufactured with wide power input range (10 ~ 30 VDC) and operating temperature (-25 °C ~ +75 °C). It simplifies installation and maintenance of I/O modules with hot swappable and auto configuration, fault and error detection, dual watchdog, programmable power on and Safe Values.

Various software development kits (SDK) and demos are provided, such as PACSDK, 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.


 Main Unit
 64-bit Hardware Serial Number Yes


 LED Indicators
 Status 1 x Power, 1 x System, 1 x Auto Configuration, 1 x Slot


 I/O Expansion
 I/O Type I-87K series
 Slots 8


 COM Ports
 Ports 1 x RS-485 (3000 VDC)
 Baud Rate 115200 bps Max.
 Protocol DCON (ASCII Format)


 Rotary Switch 2 x 16 Position (0 ~ F)
 DIP Switch 8-bit for auto configuration, check sum and baud rat


 Input Range +10 ~ 30 VDC
 Consumption 2.0 W


 Dimensions (mm) 312 x 132 x 111 (W x L x H)
 Installation DIN-Rail, Wall mounting


 Operating Temperature -25 ~ +75 °C
 Storage Temperature -30 ~ +80 °C
 Humidity 10 ~ 90% RH, Non-condensing



 RU-87P8-G     CR  8-slot RS-485 I/O Expansion Unit with Intelligent CPU Module (DCON Protocol) (Gray Cover) (RoHS) 1