I-8120W – 1 Port Intelligent CAN bus Communication Module

I-8120W – 1 Port Intelligent CAN bus Communication Module


Datasheet, Manual e Outros

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  • Descrição
  • applications
  • Architecture
  • Solution for CAN bus Power Meter
  • Features
  • Hardware Specifications
  • Software Utility Features & Ordering Information
  • Optional Accessories


The CAN (Controller Area Network) is a serial communication bus especially suited to interconnect smart devices to build smart systems or sub-system. It efficiently supports distributed real-time control with a very high level of security. In CAN networks, there is no addressing of subscribers or stations in the conventional sense, but instead prioritized messages are transmitted. As standalone CAN controller, I-8120W with WinPAC-8000/ViewPAC-2xWx/XPAC-8000/XPAC-8000-CE6 series MCU (main control unit) represents an economic solution. It has one CAN communication port with 5-pin screw terminal connector, and is useful for a wide range of CAN applications. Besides,I-8120W uses the new Phillips SJA1000T and transceiver 82C250, which provide both CAN 2.0A and 2.0B specific, re-transmission function, bus arbitration and error detection.

Combining the benefits of WinPAC-8000/ViewPAC-2xWx/XPAC-8000/XPAC-8000-CE6 series MCU without increasing the CPU loading heavily, it could be a powerful multi CAN port programmable device server by driving the program in the 186 CPU ofI-8120W. It can also communicate with other kinds of communication interface, such as RS-232/RS-485/Ethernet ports to be a programmable device server. Therefore, users can design the various applications between different communication protocols.

Software Architecture
Default Firmware Application User-definded Firmware Application

The PM-213x-CAN series power meter provides the CAN bus interface for users to easily gather the real-time power consumption information in their CAN applications. The PM-213x-CAN provides the Auto-Response mode which responses messages at regular intervals automatically. It makes the communication more efficient when collecting a lot of remote power information. The polling mode offers the precise information of every step required by the monitors. In addition, the PM-213x-CAN also owns the arbitration mechanism which can avoid data collision and error detection.

Features of CAN bus power meter:
  • NXP TJA1042 CAN transceiver
  • Follow CiA CAN 2.0B specification
  • Support Auto-Response mode and Polling mode
  • Support baud rate 125 kbps, 250 kbps and 500 kbps
  • Support up to 255 nodes on the CAN network
  • 2500 Vrms isolation on CAN port
  • 4 kV ESD protection on CAN port
  • CAN bus provides better capability in noise suppression
  • Support arbitration mechanism to avoid collision
  • Support error detection and error correction on CAN bus

Link to Power Meter page…

PAC based Solution

The PAC family of ICP DAS is a modular network-based PAC with the capability of connecting I/O either through its own dual backplane bus or alternatively through remote I/O units and remote I/O modules. Applying the PM-213x-CAN into the PAC based system, the user could use I-8120W with power meter firmware inside. The power meter firmware manages all the PM-213x-CAN power meters and collects all power data automatically. We provide the development API and the management utility which is shown as the following picture..

Download …

Common Features

  • Support WinPAC-8000, ViewPAC, XPAC-8000, XPAC-8000-CE6 series MCU (driver for LinPAC and iPAC will be available soon)
  • 8 KB DPRAM inside
  • RTC(Real Time Clock) inside
  • Allow user to program user-defined firmware in I-8120W
  • Support default firmware update
  • eVC++, VC6, VS 2005(VB.Net, C#.Net, VC++) demos and libraries are given
  • C/C++ function libraries of firmware and demos are given

Note: The XPAC-8000 series MCU can support only 1 I-8120W.

CAN Port Features

  • Follow ISO11898-2 specification
  • Philip SJA1000T CAN controller
  • Philip 82C250 CAN transceiver
  • CAN controller frequency :16 MHz
  • 2500 Vrms photo-isolation protection on CAN side
  • Switch for 120 Ω terminator resistor of CAN bus
  • Compatible with CAN specification 2.0 parts A and B
  • Provide default baud rate: 10 kbps, 20 kbps, 50 kbps, 125 kbps, 250 kbps, 500 kbps, 800 kbps, and 1 Mbps
  • Allow user-defined baud rate
  • Cyclic transmission precision: ±0.5ms precision when cyclic time is below 10ms , ±1% error when cyclic time exceeds 10ms
  • Provide 5 sets of cyclic transmission
  • Timestamp of CAN message with ±1ms precision

Note: We have verified to drive 100 CAN nodes at the same time via one CAN port of I-8120W.

80186, 80 MHz or compatible
512 KB / 512 KB / 16 KB
8 KB
Watchdog IC
ESD Protection
2 kV class A
CAN Interface
NXP SJA1000T with 16 MHz clock
NXP 82C250
5-pin screw terminal block (CAN_GND, CAN_L, CAN_SHLD, CAN_H, N/A)
Baud Rate (bps)
10 k, 20 k, 50 k, 125 k, 250 k, 500 k, 800 k, 1 M (allow user-defined baud rate)
3000 VDC for DC-to-DC, 2500 Vrms for photo-couple
Terminator Resistor
Switch for 120 Ω terminator resistor
ISO-11898-2, CAN 2.0A and CAN 2.0B
Round LED
I-8120W (for designing user-defined firmware), WinPAC, ViewPAC, XPAC, XPAC-CE6 (The XPAC series PAC only support one I-8120W)
TC/BC/TC++/BC++, eVC++ 4.0, VC++ 2005, C#.net 2005, VB.net 2005
Power supply
Unregulated +10 ~ +30 VDC
Power reverse polarity protection, Over-voltage brown-out protection
Power Consumption
1.5 W
31mm x 91mm x 115mm (W x L x H)
Operating Temp.
-25 ~ 75 ℃
Storage Temp.
-30 ~ 80 ℃
10 ~ 90% RH, non-condensing
  • Utility tool for downloading user-defined firmware and updating default firmware
  • Development Toolkit for eVC++ on WinPAC, VS 2005 (VB.Net, C#.Net, VC++) on XPAC-8000-CE6 and VC6 on XPAC-8000
  • Development Toolkit for C/C++ on MiniOS7
  • I-8120W don't support any ISaGRAF series main control unit
  • I-8120W-G CR
    Module with one programmable CAN port, ViewPAC-2xWx/WinPAC-8000/XPAC-8000/XPAC-8000-CE6 library, 80186 80MHz CPU, 8 KB DPRAM, 512 KB flash, 512 KB SRAM, 120 Ω terminal resister selected by switch
9-pin Female D-sub & 3-wire CAN bus cable (1M)
7/14 channel Surge Protector
EMI Ferrite Split/Snap-On Core
Field-Installation A-coded 5-pin Female