Siemens M7-400 ユーザーズマニュアル

10-7

S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07

•

Bus segment 1 and bus segment 2 are galvanically isolated from each other.

•

Bus segment 2 and the PG/OP socket are galvanically isolated from each other.

•

Signals are amplified

– between bus segment 1 and bus segment 2

– between PG/OP socket and bus segment 2

5V

24V

Segment 2
A2
B2
A2
B2

Segment 1

A1
B1
A1
B1

PG/OP-

socket

L+ (24 V)

M

A1
B1

5 V

M5 V

L+ (24 V)
M

PE
M 5.2

Logic

5V

24V

 

 

 

1M

1M

Figure 10-3

Block Diagram of the RS 485 Repeater