Network Router User Manual

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 c ontacts. 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