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Profibus Communication
B.2 Wiring devices with Profibus PA
DP V1 services
The following DP V1 services are supported as slaves for a class 2 master DP V1 services
supported as slaves:
• MSAC2_Initiate (Indication and Response)
• MSAC2_Abort (Request, Indication and Response)
• MSAC2_Read (Indication and Response)
• MSAC2_Write (Indication and Response)
B.2
Wiring devices with Profibus PA
Lid over terminals for power supply may not be removed! Use only certified measuring
instruments!
The Profibus PA variant of the SITRANS F M TRANSMAG 2 differs from the HART variant with the
4-20 mA output in the bus interface and the omission of the digital output 2. The basic functions
of the device including the operation and display remain basically the same.
The TRANSMAG 2 terminals 7 and 8 are reserved for the Profibus PA connection.
• 7: PA wire 1. This device is polarity independent
• 8: PA wire 2. This device is polarity independent
The PA interface is polarity independent, so the wires can be connected arbitrarily.
PA supports LINE, DROP, STAR topology and a combination of the three.
Figure B-1
Figure B-2
106
WARNING
PA wiring
PA wiring with T-connector
TRANSMAG 2 with MAG 911/E
Operating Instructions, 03/2021, A5E00102775-AC
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