Siemens SIMATIC PC BI10 Technical Description page 43

System Unit
On the FI10 and BI10, the reset button is located on the box in the area of the
slot plates. This reset button can be activated by hand, without the need for
any additional tool. The following figure shows the position of the reset
button on the FI10 and BI10 devices.
Figure 1-34
1-38
FI10, BI10 with Reset Button
SIMATIC PC BI10/FI10/FI15, Technical Description
Reset Button
C79000-G7076-C773-03