Omron E5AC-T User Manual page 55

2 Preparations
Communications
RS-485
Models with an option number of 002 to 004, 008, 020, or 022 support RS-485 communications.
Connect the communications cable across terminals 13 and 14.
Communications Unit Connection Diagram
Host computer
RS-485
−
+
100 Ω
FG
A < B: [1] Mark
A > B: [0] Space
• The RS-485 connection can be either one-to-one or one-to-N. A maximum 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 AWG18 (cross-sectional area of 0.205 to 0.823 mm
twisted-pair cable.
2 - 22
Shield
E5 C-T (No. 1)
RS-485
No.
Abbreviation
14 A (−)
B (+)
13
Terminator (120 Ω, 1/2 W)
Cross-sectional area of
conductor
2
AWG24: 0.205 mm
2
AWG18: 0.823 mm
E5 C-T (No. 31)
RS-485
No.
Abbreviation
14
A (−)
B (+)
13
E5@C-T Digital Temperature Controllers User's Manual (H185)
2
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