Connecting; Rs 485 Repeater In Ungrounded And Grounded Operation - Siemens SIMATIC RS 485 Manual

Hide thumbs Also See for SIMATIC RS 485:

Table of Contents

Connecting

5.1

Grounded or ungrounded

The RS 485 repeater is

● Grounded, if all other nodes on the bus segment are also operated on ground potential

● Ungrounded, if all other nodes in the bus segment are operated on ungrounded potential

Grounded operation of the RS 485 Repeater

For grounded operation of the RS 485 repeater, you must bridge terminals "M" and "PE" on

the top of the RS 485 repeater.

Ungrounded operation of the RS 485 repeater

For ungrounded operation of the RS 485 repeater, do not interconnect "M" and "PE" on the

top of the RS 485 repeater. In addition, the supply voltage to the RS 485 repeater must be

ungrounded.

RS 485 Repeater

Manual, 02/2011, A5E03382072-01

Note

Bus segment 1 is referenced to ground if you connect a PG to the PG/OP socket of the

RS 485 repeater. The bus segment is grounded because the MPI in the PG is grounded,

and the PG/OP socket of the RS 485 repeater is connected internally with bus segment

Table of Contents