Siemens Automation System S7-400 User Manual
Page 87
Wiring the S7-400
4-27
Automation System S7-400 Hardware and Installation
A5E00850741-01
Principle of the spring loaded terminal
The following figure shows the principle of spring contacts. Releasing and
engaging from the front is illustrated.
1. Insert the screwdriver
2. Insert the wire into the spring
contact as far as it will go
3. Withdraw the screwdriver: the wire
is trapped by the contact
Figure 4-16 Principle of the spring contact
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