23
E3NW-CRT
User’s Manual
Sec
tion 2
In
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Section 2
Specifications and Dimensions
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CompoNet Communications Specifications
Item
Specification
Communications protocol
Special CompoNet network protocol
Types of communications
Remote I/O communications (sharing data without programming) and message
communications (explicit message communications when required)
Baud rate
4 Mbps, 3 Mbps, 1.5 Mbps, or 93.75 kbps
Modulation
Base band
Coding
Manchester code
Error control
Manchester encoding rules and CRC
Communications media
The following media can be used.
• Round Cable I
• Round Cable II
• Flat Cable I (DCA4-4F10 Standard Flat Cable)
• Flat Cable II (DCA5-4F10 Sheathed Flat Cable)
Note Round Cable I, Round Cable II, Flat Cable I, and Flat Cable II 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.
Communications distance
and wiring
Refer to Cable Types, Baud Rates, and Maximum Distances in the CompoNet
Master Units Operation Manual (Cat. No. W456).
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 circuits)
• Power is supplied from the Master Unit or Repeater Unit.
Connection forms
Round Cable II, Flat Cable I, or Flat Cable II at a baud rate of 93.75 kbps: No
restrictions
Other cables or baud rates: Trunk line and branch lines
Connections for Slaves and Repeater Units: T-branch or multidrop connections
Noise resistance
Conforms to IEC 61000-4-4, 1 kV.
Address setting method
Decimal rotary address switch
Address range
0 to 62
Содержание CompoNetT E3NW-CRT
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