Siemens SIMATIC RS 485 Manual page 14

Installation
4.1 Installing and uninstalling the RS 485 repeater
5. Push it towards the back as far as it will go (5).
6. Tighten the securing screw with a torque of 80 to 110 Ncm (6).
Removing the repeater from an S7-300 mounting rail
To remove the RS 485 repeater from the S7-300 mounting rail:
1. Loosen the fixing screw of the RS 485 repeater (1) and
2. Pull the RS 485 repeater up and out (2).
14
Rear:
2
1
3
Figure 4-1 Installing the RS 485 repeater on an S7-300 mounting rail
1
Figure 4-2 Removing the RS 485 repeater from the S7-300 mounting rail
Front:
4
5
6
80 to 110 Ncm
2
RS 485 Repeater
Manual, 02/2011, A5E03382072-01