Page top


CompoNet Master Board for PCI Bus/CompactPCI Bus


CompoNet Master Board for PC which provides ultra-high speed control

Communications Specifications

Item Specification
Communications protocol CompoNet Network protocol
Types of communications Remote I/O communications (programless, constant sharing of data with Slave Units)
and message communications (explicit message communications as required with
Slave Units and FINS message communications as required with controllers) *1
Baud rate 4 Mbps *2, 3 Mbps, 1.5 Mbps, 93.75 kbps
Modulation Base-band
Coding Manchester code
Error control Manchester code rules, CRC
Communications media *3 The following media can be used.
• Round cable I 2-wire 0.75 mm2
• Round cable II 4-wire 0.75 mm2
• Flat Cable I
Communications distance
and wiring
Refer to Cable Types, Baud Rates, and Maximum Distances in the Master Unit
Operation Manual.
Connectable Master Units CompoNet Master Units
Connectable Slave Units CompoNet Slave Units
Maximum I/O capacity Word Slave Units: 1,024 inputs and 1,024 outputs (2,048 I/O points total)
Bit Slave Units: 256 inputs and 256 outputs (512 I/O points total)
Maximum number of nodes Word Slave Units: 64 input nodes and 64 output nodes
Bit Slave Units: 128 input nodes and 128 output nodes
Repeater Units: 64 nodes
Bits allocated per node
Word Slave Units: 16 bits
Bit Slave Units: 2 bits
Maximum number of nodes
per trunk line or sub-
trunk line
32 nodes (Slave Units and Repeater Units)
Applicable node addresses Word Slave Units: IN0 to IN63 and OUT0 to OUT63
Bit Slave Units: IN0 to IN127 and OUT0 to OUT127
Repeater Units: 0 to 63
Repeater Unit application
Up to 64 Repeater Units can be connected per network (i.e., per Master Unit). Up to 32
Repeater Units can be connected per trunk line or per sub-trunk line. When Repeater
Units are connected in series from the Master Unit, up to two extra segment layers can
be created (i.e., up to 2 Repeater Units are allowed between a Slave Unit and the Master
Signal lines Two lines: BDH (communications data high) and BDL (communications data low)
Power lines Two lines: BS+ and BS- (power for communications and internal Slave Unit circuits)
• Power is supplied from the Master Unit or Repeater Units.
Communications power
supply voltage
24 VDC ±10%
Connection forms Round cable II (4-wire) or Flat cable I at baud rate of 93.75 kbits/s: No restrictions
Other cables or baud rates: Trunk line and branch lines
Connections for Slave Units and Repeater Units: T-branch or multidrop connections

*1 FINS message communications are supported by CJ-series Controllers only.
*2 A baud rate of 4 Mbps is not supported for branch lines and thus cannot be used for Slave Units with Cables (i.e., Bit
      Slave Units).
*3 Round cable I, round cable II and Flat Cable I are all different types of cable. To use more than one type of cable at a
      time, Repeater Units must be used to separate them on trunk lines and sub-trunk lines.

General Specifications

Item Specifications
3G8F7-CRM21 (PCI)
Bus specification PCI bus Rev2.2
5 V
Number of mountable boards 4 pieces
Compatible OS Microsoft Windows 2000/XP (32 Bit version)/Vista (32 Bit version)/7 (32 Bit version)
Other OS can be used, when the shared memory interface is directly accessed.
Weight 90 g max.
Operation voltage Internal power supply: 5 VDC±5%
3.3 VDC is not used.
Consumption current Internal power supply: 5 VDC and 1.5 A max
Communications power supply: 24 VDC and 80 mA max
Vibration resistance 10 to 57 Hz, Amplitude 0.075 mm, 57 to 150 Hz
Acceleration 9.8 m/s2, 80 min in each direction of X, Y and Z (8 min of each sweep
time × 10 sweeps = total 80 min)
Shock resistance 147 m/s2, 3 times in each direction of X, Y and Z.
Ambient operating temperature 0 to 55°C
Ambient operating humidity 0% to 80% RH (with no condensation)
Ambient operating atmosphere No corrosive gas
Storage temperature -20 to +60°C

Development Environment

• Microsoft Visual C++ (Ver 6.0 to Ver 2008)
• Microsoft Visual Basic (Ver 6.0)
• CodeGear C++Builder (Ver 5 to Ver 2009)