Omron E5C series, User Manual

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E5@C Digital Temperature Controllers User’s Manual (H174)
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Communications
RS-485
Models with an option number of 002 to 004, 008, 009, 012, 014, or 015 support RS-485 communications.
Connect the communications cable to terminals 13 and 14 to use communications with the E5CC, E5AC, or
E5EC. Connect the communications cable to terminals 3 and 4 to use communications with the E5DC.
Communications Unit Connection Diagram
E5CC/E5EC/E5AC
E5DC
• 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
2
)
twisted-pair cable.
Note: The E5CC-U does not support communications.
No.
14
13
No.
14
13
RS-485
E5CC/E5EC/E5AC (No. 1)
RS-485
E5CC/E5EC/E5AC
(No. 31)
100
Ω
A (
−
)
B (+)
A (
−
)
B (+)
−
+
FG
RS-485
Host computer
Shield
Terminator (120
Ω
, 1/2 W)
Abbreviation
Abbreviation
A < B: [1] Mark
A > B: [0] Space
Terminator (120
Ω
, 1/2 W)
−
+
FG
No. Abbreviation
4 A(
−
)
3 B(+)
No. Abbreviation
4 A(
−
)
3 B(+)
RS-485
E5DC (No. 1)
RS-485
E5DC (No. 31)
100
Ω
RS-485
host computer
Shield
A < B: "1" Mark
A > B: [0] Space
Cross-sectional area of
conductor
AWG24: 0.205 mm
2
AWG18: 0.823 mm
2