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23
Wiring Terminals
Section 2-2
Note
• If there are problems with communications noise performance when using
the port A connector, connect 110 to 125
Ω
of terminating resistance
across terminals 1 and 2 of port A on the EDU.
• Specify both ends of the transmission path, including the host computer,
as end nodes (i.e., connect terminators to both end). The minimum termi-
nating resistance is 54
Ω
.
■
Connection Example
Port C communications
B1
B2
B3
B4
B5
B6
B7
B8
B9
A1
A2
A3
A4
A5
A6
A7
A8
A9
HFU
1
2
3
4
5
6
7
8
9
EDUA
1
2
3
4
5
6
7
8
9
10
EDUC
B7
B8
RS-485
RS-232C
A7
A8
A9
DO NOTUSE
RS-422
RS-422
1
2
RS-485
6
7
7
8
RS-485
Port A communications
Port B communications
Models with
Screw
Terminals
(EDUA)
Connector
Terminal
Block Model
(EDUC)
Models with
Screw
Terminals
(EDUA)
Connector
Terminal
Block Model
(EDUC)
SD
RD
SG
B (+)
A (
−
)
RDB (+)
RDA (
−
)
SDB (+)
SDA (
−
)
B (+)
A (
−
)
B (+)
A (
−
)
R
6
7
EJ1
EDUA
B (+) 6
7
EJ1
EDUA
FG
−
+
R
RS-485
Host Shield
Terminator
110 to 125
Ω
(1/2 W)
B (+)
A (
−
)
A (
−
)
Summary of Contents for EJ1 EtherCAT
Page 2: ...EJ1 Modular Temperature Controllers User s Manual Revised July 2008 ...
Page 3: ...iv ...
Page 19: ...xx ...
Page 213: ...188 Detailed Description of Services Section 6 4 ...
Page 227: ...202 Detailed Description of Services Section 7 5 ...
Page 303: ...278 Index ...
Page 305: ......