Omron E5AR-T User Manual page 47

Section 2 Preparations
● Communications
(Terminals)
E5AR-T
A B C D
1
2
3
4
5
6
1
RS485
2
3
4
5
6
F G H I J
E5ER-T
A B
1 1
2 2
3 3
4 4
5 5
6 6
1 1
RS485
2 2
3 3
4 4
5 5
6 6
C D E
F1 (B)
Terminator
F2 (A)
2-16
• To communicate with a host system, connect the communications
line between terminals F1 and F2 on the E5AR-T, or between C1
and C2 on the E5ER-T.
E
E5AR-T
1
2
1 B(+)
RS-485
3
2 A( )
4
5 F
6
1
• The connection type is 1:1 or 1:N. With a 1:N installation, up to 32
2
Controllers, including the host computer, can be connected.
3
4
• The maximum total cable length is 500 m.
5
6
K • Use a shielded twisted-pair cable (AWG28 min.).
Cable Reference Diagram
• Use a resistance of 100 to 125
terminators at both ends of the transmission path, including the host
computer.
• To connect to an RS-232C port on a computer, use an RS-232C-485
converter.
Example converter: K3SC RS-232C/RS-485 Interface Converter
K32-23209
Adapter
RS-232C
RS-232C/RS-485
D-sub, 9-pin
(straight)
F1 (B)
F2 (A)
E5AR-T
(No. 0)
E5ER-T
1 B(+)
RS-485
2 A( )
C
AWG28 min., conductor
cross-sectional area
0.081 mm 2
(1/2 W) for the terminators. Install
K3SC-10
Converter
+
F1 (B)
F2 (A)
E5AR-T
(No. 1)
min.
Terminator
100 to 125
(1/2 W)
E5AR-T
(No. 31)