Omron E5CN User Manual page 50

Wiring Terminals
Communications
28
EV1
+
EV2
+
E5CN-@@@B
RS-485
• When communications are to be used with the E5@N-@@@03, connect
communications cable across terminals 11 and 12.
11
B (+)
RS-485
A ( )
12
E5@N-@@@03
Specify both ends of the transmission path including the host computer as
end nodes (that is, connect terminators to both ends).
The minimum terminal resistance is 54 .
Communications Unit Connection Diagram
Host computer
RS-485
+
FG
A < B: [1] Mark
A > B: [0] Space
• The RS-485 connection can be either one-to-one or one-to-N. A maxi-
mum of 32 Units (including the host computer) can be connected in one-
to-N systems. The maximum total cable length is 500 m. Use AWG24
(cross-sectional area: 0.205 mm
2
2.081 mm ) shielded twisted-pair cable.
+
EV1
+
EV2
E5AN/EN-@@@B
Shield
E5@N (No. 1)
RS-485
No.
Abbreviation
12 A ( )
11 B (+)
Terminator (120 , 1/2 W)
2
) to AWG14 (cross-sectional area:
Cross-sectional area of
conductor
AWG24: 0.205 mm
AWG14: 2.081 mm
Section 2-2
E5@N (No. 31)
RS-485
No.
Abbreviation
12
A ( )
11
B (+)
2
2