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4-50
Chapter 4: Appendix F - RS-485/422 Option
Table 29: Intellicon-6+2 RxD/CTS line loads
Jumper
No.
J3
J4
J5
J6
Port
No.
7
7
8
8
Signal
RxD
CTS
RxD
CTS
Jumper
Removed
Installed
R/C series load
Resitive load
R/C series load
Resitive load
R/C series load
Resitive load
R/C series load
Resitive load
You should use the "R" load for two situations: a point to point
connection that is less than 50 meters (150') long and for a "last
station load" on a multi-drop line of less than 50 meters. To
enable this load install a jumper on J3, J4, J5, and/or J6.
You use the "RC" load for situations described above, where the
line length exceeds 50 meters. To enable this load remove the
appropriate jumper on J3, J4, J5 and/or J6. The RS-485/422
schematic in Figure 45 shows these jumpers as "Jc".
Examples:
1. The following example shows port 7 set for a point to point
connection less than 50 metres("R" load) and port 8 set for a
point to point connection over 50 metres("RC" load).
J3
J4
J5
J6
2.
The following example shows port 7 set for a point to point
connection less than 50 metres("R" load) and port 8 set for a
last station load("R" load) on a multi-drop line of less than
50 metres.
J3
J4
J5
J6
Intellicon User's Manual, ver. 2.30