Schneider Electric 312 Connection to the Modbus base port, Connection to the Profibus DP network

Hardware setup

Connection to the Modbus base port

8........................1

1

2

3

4

5

6

7

8

Not connected Not connected Not connected D1

D0

Not connected VP (1) Common

(1) Reserved for RS232/RS485 converter

Connection to the PROFIBUS DP network

SW1 description, see page 14.

PROFIBUS DP

connector

EMC clamps

(1): pins A and pins B are internally connected.

Number	Terminal	Electrical characteristics
1	DGND	Data Ground: Not Connected
2	A	RxD/TxD-N: Receive/Transmit-Data-N
3	B	RxD/TxD-P: Receive/Transmit-Data-P
4	A	RxD/TxD-N: Receive/Transmit-Data-N
5	B	RxD/TxD-P: Receive/Transmit-Data-P
6	SHLD	SHIELD
		Note: If EMC clamp is not connected, wire the PROFIBUS DP cable shield to SHLD.
7	SCR	SCREEN: Connect to the ground

The line termination is activated with the switches SW2 (dip switches 1 and 2 to ON position).

S1A10386 10/2009 11