Omron E5AR - MANUAL 2 - Page 48

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