PROFIBUS LOOP VOLTAGE
DEAR SIR,
WE ARE USING PROFIBUS LOOP & CHECK VOLTAGE OF 9 PIN CONNECTOR PIN-3 & PIN-1 & FOUND VOLTAGE WERE 2.5 V DC AT DCS SIDE AND AT IMCC SIDE WE FOUND VOLTAGE WAS 2.6 VDC.We want to know that what is Min Voltage Required or recommend???
Any docoument that indicate thatr Voltage shall be 3-5 Volt DC.
WE ARE USING PROFIBUS LOOP & CHECK VOLTAGE OF 9 PIN CONNECTOR PIN-3 & PIN-1 & FOUND VOLTAGE WERE 2.5 V DC AT DCS SIDE AND AT IMCC SIDE WE FOUND VOLTAGE WAS 2.6 VDC.We want to know that what is Min Voltage Required or recommend???
Any docoument that indicate thatr Voltage shall be 3-5 Volt DC.
Asked 9 months ago
Answers
0
the voltage does need to be above a certain threshold for valid comms, but you need to use a proper profi tester to get the levels.
2.5 is low if you are measuring with a scope or profi tester.
regards
dave
2.5 is low if you are measuring with a scope or profi tester.
regards
dave
Answered 9 months ago
0
Hi,
As the Profibus DP is Using RS-485 so we can consider the voltage level between 0v to +5v,for communication to be done between the slaves and master minimum voltage level of 2.5V above need to be maintained.
Answered 9 months ago
Source: 3BDS009029R5001 B
0
What exactly did you measure? Pin 3 to Pin 1 seems to be one of the differential signal lines to the screen (screen is optional!). But there should be a galvanic isolation in between, so you will not get a valid value.
The termination supply voltage can be measured between Pins 5 and 6 and has to be 5V DC.
The voltage on the differential pair varies if you have communication. In idle state it is defined by the 5V DC supply on the connector and the resistive termination networks inside the connectors at both ends of the Profibus cable.
The termination supply voltage can be measured between Pins 5 and 6 and has to be 5V DC.
The voltage on the differential pair varies if you have communication. In idle state it is defined by the 5V DC supply on the connector and the resistive termination networks inside the connectors at both ends of the Profibus cable.
Answered 9 months ago
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