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3 Installation and Commissioning
Terminating Resistors
Jumper
Connected
X3
1–2
X4
1–2
Figure 3-14
Location of the Jumpers for Configuring the Profibus–Interface Terminating Resistors
334
Terminating Resistors
Jumper
Connected
X3
2–3
X4
2–3
*)
Figure 3-13
Location of the Jumpers for Configuring the Terminating Resistors of the
Interface
Disconnected
*
2–3
)
*
2–3
)
*)
Factory Set
Terminating resistors can also be implemented outside the device (e.g. in the plug
connectors). In that case the terminating resistors provided on the RS485/Profibus
interface module or directly on the C-CPU-2 board card must be switched out (refer
Figure 3-8). In that case the terminating resistors provided on the RS485/Profibus
interface module or directly on the C-CPU-2 board card must be switched out.
RS232 can be changed to RS485 and vice versa by setting the jumpers on the
interface cards. Figure 3-13 shows the physical location of the jumpers. Table 3-19
shows which jumper settings are associated to RS232 and RS485 respectively. When
the device is delivered from the factory, the jumper setting corresponds to the
configuration ordered and need not be changed.
Table 3-19
Configuration of Jumpers for RS 232 or RS 485 on the Interface Card
Jumper
X5
RS 232
1–2
RS 485
2–3
Jumpers X5 through X10 must be set on the same position!
Disconnected
*
1–2
)
*
1–2
)
Factory Set
C53207-A322-
X6
X7
X8
1–2
1–2
1–2
2–3
2–3
2–3
1
2
3
X3
X6
1
X7
2
3
X4
X12
X5
1
2
3
1
2
3
1
2
3
X10
1
2
3
1
2
3
C53207-
A324-B180
2 3 4
B100
B101
3
2
1
X4
3
2
1
X3
X10
X11
X12
1–2
2–3
1–2
2–3
2–3
1–2
C53000-G1176-C149-3
X13
1–2
1–2
7UM62 Manual
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