Profibus Dp - GE MM300 Manual

CHAPTER 4: FIELDBUS INTERFACE

Profibus DP

MM300 MOTOR MANAGEMENT SYSTEM – COMMUNICATIONS GUIDE
To enable the Profibus physical interface, ensure that switches 3 and 4 of the DIP switch on
the communications card (on the CPU module) are ON, and that switches 1 and 2 are OFF.
The external connections through the Fieldbus interface are as follows:
Table 4-1: Fieldbus interface external connections (Profibus)
Pin
V–
L
C
H
V+
Table 4-2: DB9 signal pin applicability to MM300
DB9 pin (external device)
1
2
3
4
5
6
Connection (external device)
Pin 5
Pin 8, line A (negative TX/RX)
Common drain
Pin 3, line B (positive TX/RX)
Pin 6
MM300 pin Signal
C (shield)
No connection M24
H RxD/TxD-P
No connection CNTR-P
V- DGND
V+ VP
PROFIBUS DP
Description
Shield or potential equalization
Ground of 24V power supply
Receive/Transmit data; line B (red)
Repeater control
Data ground (reference voltage to VP)
Power supply*
1
4–3