Omron E5AN User Manual page 79

Wiring Terminals
Communications Unit Connection Diagram
E5CN
Host computer
RS-485
+
FG
A < B: [1] Mark
A > B: [0] Space
E5AN/EN
Host computer
RS-485
+
FG
A < B: [1] Mark
A > B: [0] Space
E5GN
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 a shielded,
AWG24 to AWG14 (cross-sectional area of 0.205 to 2.081 mm
pair cable for the E5CN, E5EN, or E5AN. Use a shielded, AWG24 to
AWG18 (cross-sectional area of 0.205 to 0.823 mm
for the E5GN.
Shield
E5CN (No. 1)
RS-485
No.
Abbreviation
12 A ( )
11 B (+)
Terminator (120 , 1/2 W)
Shield
RS-485
No.
Abbreviation
22 A ( )
21
B (+)
12 A ( )
11
B (+)
Shield
E5GN (No. 1)
RS-485
No.
Abbreviation
A ( )
8
7 B (+)
Cross-sectional area of
conductor
AWG24: 0.205 mm
AWG14: 2.081 mm
Section 2-2
E5CN (No. 31)
RS-485
No.
Abbreviation
12
A ( )
11
B (+)
E5AN/EN (No. 31)
RS-485
No.
Abbreviation
22
A ( )
21
B (+)
12 A ( )
11
B (+)
Terminator (120 , 1/2 W)
E5GN (No. 31)
RS-485
No.
Abbreviation
8 A ( )
7 B (+)
Terminator (120 , 1/2 W)
2
) twisted-
2
) twisted-pair cable
2
2
43