Siemens S5-155U System Manual page 283

Jumper assignments
System Manual
C79000-B8576-C199-03
IM 300-5 (-LB11)
X3
X4
Figure 7-4 Locations of Jumpers on the IM 300-5 (-5LB11)
(when Delivered)
You must insert jumpers Q1 to Q4 for addressing in the normal (P)
area.
If you insert jumper Q5, the "I/Os not ready" message will be relayed
to the CPU.
All other jumpers must remain in their factory settings.
The 300 and 312 Interface Modules
M1
P1
X1
X2
Q1Q2 Q3 Q4Q5
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