21
Wiring Terminals Section 2-2
• To satisfy the requirements of the EN 61326 class A standard in the con-
ducted emission test, add a clamp filter (TDK: ZAT1730-0730) in the com-
munications line between the K3SC and the Temperature Controller.
• The RS-485 connection can be either one-to-one to one-to-N. Up to
32 units including the host computer can be connected in one-to-N sys-
tems. Use AWG24 (cross-sectional area: 0.205 mm
2
) to AWG14 (cross-
sectional area: 2.081 mm
2
) shielded twisted-pair cable and keep the total
cable length to 500 m.
Terminator (120 Ω, 1/2 W)
Communications Unit Wiring Diagram
Host computer
RS-485
Shielded cable
E5AZ/E5EZ (No.1)
Abbr.
A<B: "1" mark
A>B: "0" space
E5AZ/E5EZ (No.31)
No
A(−)
13
B(+)12
Abbr.
No
A(−)
13
B(+)
12
−
+
FG
RS-485
RS-485
Cross-sectional area of conductor
AWG24: 0.205 mm
2
AWG14: 2.081 mm
2
Cable reference diagram
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