KROHNE OPTIMASS MFC 300 - Page 8

8
MMFFCC TTeerrmmiinnaallss
BB-CC-DD-
PPRROOFFIIBBUUSS DDeessiiggnnaattiioonnss
T +B-A-T+B-A
Termination
positive
TxD+/RxD+
second connection
TxD-/RxD-
Second connection
Termination
negative
TxD+/RxD+
first connection
TxD-/RxD-
first connection
BB- DCD-C-
IIII
+5V
R2 R1R1
I = 110nH
R1 = 390

R2 = 220
3
BB- DCD-C-
IIII
+5V
R2 R1R1
I = 110nH
R1 = 390

R2 = 220
2
1 External connection PROFIBUS DP device at low datarates connected with spur. (Spurs are
only allowed at low data rates)
2 External connection PROFIBUS DP last device, internal bus termination is active.
3 External connections PROFIBUS DP device in trunk.
Please also refer to publication: “
Installation Guidelines for PROFIBUS DP/FMS ” (PNO Order
Number 2.112/2.111)