Mitsubishi Electric Q81BD-J61BT11 User Manual page 121

5 PROCEDURE BEFORE STARTING THE DATA LINK
Item
Transmission rate
Maximum length of the main line
Maximum length of the main line
Overall branch line length
Maximum number of connected
stations on the branch line
Connected cable
Terminal resistor
(connection method)
Only when the I/F board,
A(1S)J61BT11 or
A(1S)J61QBT11 is used
as the master station.
When the QJ61BT11 is
used as the master
station, connect the 110 
resistor that is supplied
with the module. For the
connection method, refer
to Section 5.4.3.
T-branch terminal
block/connector
Maximum length of main line,
distance between T-branches,
and length of cable between
stations.
Terminal
resistor
2
R
2
1
1
(Length of branch line:8 m(26.25 ft.) or shorter)
5 - 13
(2) T-Branch communication specifications list
The following explains the communication specifications for T-branch connection.
For communication specifications not listed below, refer to Section 3.2
"Performance Specifications."
Specification
625 kbps
100 m
(328.1 ft.)
8 m (26.25 ft.)
50 m (164.05 ft.)
6 stations per branch
CC-Link dedicated cable
Ver 1.10 corresponding CC-Link dedicated cable
110   5 , 1/2 W
4
(Connect between DA and DG/DB and DG)...both ends
[Connection]
110 
Terminal
110 
resistor
• Terminal block: Off-the-shelf terminal block
• Connector: Connector NECA4202 for the FA sensor (IEC947-5-
2) comparable product is recommended.
The CC-Link dedicated cable, Ver. 1.10 compatible CC-Link dedicated cable (terminal resistor of 110  used).
Transmission Maximum length
rate of main line
625 kbps 100 m (328.1 ft)
156 kbps 500 m (1640.5 ft)
1: The cable length of 1 m (3.28 ft.) or longer is for a system configured only with remote I/O stations and remote
device stations.
2: The cable length of 2 m (6.56 ft.) or longer is for a system configuration that contains local stations and intelligent
device stations.
Maximum length of main line(not including the branch line length)
2
Master
station
2
R
L/I
R
R
156 kbps
500 m
(1640.5 ft.)
200 m (656.2 ft.)
DA
DB
DG
SLD
Distance Length of cable between
the remote I/O stations or
between
T-branches remote device stations
No limit 30 cm (11.8 in.) or longer
Distance between T-branches
1 1
R R R
L/I
R
Indicates a remote I/O station or a remote device station.
L/I
Indicates a local station or an intelligent device station.
Remarks
10 M/5 M/2.5 Mbps are not allowed to use.
Indicates the length of the cable between terminal
resistors. The length of the T-branch cable (branch
line length) is not included.
Indicates the overall cable length per branch.
Indicates the overall length of the entire branch cable.
The total number of connected stations depends on
the CC-Link specifications.
• The CC-Link dedicated high performance cable
cannot be used (example: FANC-SBH).
• Mixed use of the CC-Link dedicated cables made by
different manufacturers is not allowed.
• Mixed use of the Ver. 1.10 compatible CC-Link
dedicated cables made by different manufacturers is
not allowed.
• Use a commercially available terminal resistor of
110   5 , 1/2 W resistance.
• 110  and 130  resistors that are supplied with the
CC-Link Ver.2 board, master/local modules cannot
be used.
• When wiring cables for the main line side, try not to
remove the covering as much as possible.
Length of cable between the master/
local station or intelligent device station
1
and the adjacent station(s)
1 m (3.28 ft.) or longer (
2 m (6.56 ft.) or longer (
2 2
2
L/I
R
2
2
1 1
R R R
(Length of branch line:8 m(26.25 ft.) or shorter)
MELSEC
2
1
)/
2
)
Terminal
resistor
L/I
1 1
R R
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