33
Wiring Terminals Section 2-2
E5AN/EN
• 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
) to AWG14 (cross-sectional area:
2.081 mm
2
) shielded twisted-pair cable.
RS-485
RS-485
RS-485
Host computer
Shield
Terminator (120 Ω, 1/2 W)
Abbreviation
A < B: [1] Mark
A > B: [0] Space
−
+
FG
No.
22
21
No.
22
21
12
11
12
11
E5AN/EN (No. 31)
E5AN/EN (No. 1)
Abbreviation
A (−)
A (−)
A (−)
A (−)
B (+)
B (+)
B (+)
B (+)
Cross-sectional area of
conductor
AWG24: 0.205 mm
2
AWG14: 2.081 mm
2