23
Wiring Terminals
Section 2-2
■
Connection Example
• The RS-485 connection can be either 1:1 or 1:N. RS-232C connections
can only be 1:1. A maximum of 32 Units (including the host) can be con-
nected in 1:N systems. The maximum total cable length is 500 m. Use
AWG28 (cross-sectional area: 0.081 mm
2
) to AWG16 (cross-sectional
area: 1.309 mm
2
) shielded twisted-pair cable.
R
1
2
EJ1G
EDU
B (+) 1
2
EJ1G
EDU
FG
−
+
R
RS-485
Host Shield
Terminator
110 to 125
Ω
(1/2 W)
B (+)
A (
−
)
A (
−
)
Cross-sectional area of conductor
AWG28: 0.081 mm
2
AWG16: 1.309 mm
2
Summary of Contents for EJ1G
Page 3: ...iv ...
Page 17: ...xviii ...
Page 21: ...xxii ...
Page 53: ...32 Unit Configuration Examples Section 2 4 ...
Page 69: ...48 Changing SPs During Operation Section 3 3 ...
Page 81: ...60 Other Functions Section 4 5 ...
Page 145: ...124 Other HFU Functions Section 5 7 ...
Page 167: ...146 Detailed Description of Services Section 6 4 ...
Page 229: ...208 Parameters That Can Be Allocated for Programless Communications Appendix ...
Page 237: ......