Connecting The Signal-Line Shield - Siemens SIMATIC S7-300 Reference Manual

8.4.3

Connecting the Signal-Line Shield

Two options for connecting the shield
You can connect the signal line shield to ground as follows:
• On the analog module by means of a shield-support element
(refer to the manual Hardware and Installation for the S7-300 or the manual
Distributed I/O device ET 200M in the section on wiring)
• Directly to the terminal block by means of a shielding plate
Connecting the shield to the terminal block using a shielding plate
1. Before mounting, attach a shielding plate to the terminal block.
2. Mount the terminal block on the DIN rail.
(In the figure below, you can see that the shielding plate is applied to the rear of
the terminal block and thus there is a connection to the grounded rail.)
3. Place the signal-line shield with the shield terminals on the shielding plate.
Press down lightly on the
release to loosen the
shielding plate
Snap the shielding plate into place at the rear of the terminal block.
Figure 8-12
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
SIMATIC TOP Connect and SIMATIC TOP Connect TPA
Loosen
shielding plate
Snap the
shielding plate
into place
SIMATIC TOP connect TPA Terminal Block with Shielding Plate
Shield support for shield terminal and
connecting cable to analog module
Terminal block
Shielding plate
Shield support fro shield terminal
and signal lines from
actuators/sensors
8-23