Omron E5AR - MANUAL 2 User Manual page 48

● Communication
(terminals)
E5AR
A B C D E
1
2
3
4
5
6
1
RS485
2
3
4
5
6
F G H I J K
E5ER
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
Terminator
F1 (B)
100 - 125
F2 (A)
(1/2 W)
• To communicate with a host system, connect between terminals F1
and F2 on the E5AR, or C1 and C2 on the E5ER.
E5AR
1 B(+)
RS-485
1
A(-)
2
2
3
F
4
5
6
• The connection type is 1:1 or 1:N. In a 1:N installation, up to 32
1
2
units, including the host computer, can be connected.
3
4
• The maximum total cable length is 500 m.
5
6
• Use a shielded twisted pair cable (AWG28 or higher).
<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 RS232C port on a computer, use a 232C-485
convertor.
Example convertor: RS-232C-RS-485 Interface Convertor
Adapter
K32-23209
RS-232C
D-sub, 9pin
(Straight)
F1
F2
E5AR
(No.0)
2.2 How to Use the Terminals
E5ER
1 B(+)
RS-485
A(-)
2
C
AWG28 or higher,
cross sectional area of
conductor 0.081 mm
(1/2 W) in the terminators. Install
K3SC
RS-232C/RS-485
Converter
K3SC-10
+ -
(B) F1
(A) F2
E5AR
(No.1)
2
Terminator
(B)
100 - 125
(A)
(1/2 W)
E5AR
(No.31)
2-17