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6 WIRING
6.4 T-branch Connection
35
6
Communication specifications for a T-branch connection
The following table lists the communication specifications upon T-branch connection.
For those not listed below, refer to the performance specifications. ( Page 17 Performance Specifications)
■Maximum length of the main line, distance between T-branches, and cable length between
stations
*1 This applies to a system configuration with a remote I/O station and remote device station.
*2 This applies to a system configuration including a local station and intelligent device station.
*3 Station-to-station cable length between remote I/O stations or remote device stations
*4 Station-to-station cable length between a master/ local station, or intelligent device station and an adjacent station to the front or back
Item Specifications Remarks
Transmission speed 625kbps 156kbps 10M, 5M, and 2.5Mbps cannot be
used.
Maximum length of the main line 100m 500m A cable length between terminating
resistors.
The length (branch line length) of a T-
branch cable is not included.
Maximum length of the branch line 8m A total cable length for each branch
Overall branch line length 50m 200m A total length of all branch cables
Maximum number of connected
modules on the branch line
6 stations per branch The total number of connected
stations depends on the CC-Link
specifications.
Connection cable Ver.1.10-compatible CC-Link dedicated cable
T branch terminal block Commercially available terminal block Do not remove the jacket of the
cables on the branch line, if possible.
T branch connector A connector for an FA sensor conforming to NECA4202 (IEC947-5-2) or
equivalent product is recommended.
(NECA: Nippon Electric Control Equipment Industries Association)
Transmission
speed
Maximum
length of the
main line
Distance
between T
branches
Station-to-station cable length
between remote I/O stations or
remote device stations
Station-to-station cable length between a
master station, local station, or intelligent
device station and an adjacent station to the
front or back
625kbps 100m No restriction 30cm or more 1m or more
*1
/2m or more
*2
156kbps 500m
R
R
R
R
R
R
R RR
L/I
R R
R
R
L/I L/I
R
L/I
L/I
*3 *3 *3 *3
*4
*4
*4
*3*3
*4*4
*4
*4
*3
*3
*4
Master station
*4
Maximum length of the main line (not including the branch line length)
Terminating
resistor
Terminating
resistor
Distance between T branches
(Branch line length: 8m or shorter)
(Branch line length: 8m or shorter)
: Represents a remote I/O station or a remote device station.
: Represents a local station or an intelligent device station.