Siemens SIMATIC NET PROFIBUS 用户手册

5-10

PROFIBUS Networks SIMATIC NET

6GK1970-5CA20-0AA1 Release 2 05/2000

To install the RS-485 repeater on an S7-300 rail, the catch on the rear of the
RS-485 repeater must first be removed (see Figure 5-6):

1. Insert a screwdriver below the tongue of the catch (1) and

2. Push the screwdriver towards the rear of the module (2). Hold the screwdriver

in this position!

Result: The catch is released from the RS- 485 repeater.

3. With your free hand lift the catch up as far as it will go and then remove the

catch (3).

Result: The catch is removed from the RS-485 repeater.

4. Fit the RS-485 repeater onto the rail for an S7-300 (4).

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).

Rear view:

Front view:

80 to 110 Ncm

Figure 5-6

Installing the RS-485 Repeater on an S7-300 Rail