ABB SYN 5201 Operating Instructions Manual page 10

Operating Instructions
Voltage measurement (SYN 5202: channel 1)
The two input voltages U1 and U2 are passed to the processor via high-impedance input
resistors, differential amplifiers, low-pass filters and A/D converters.
Voltage measurement channel 2 (SYN 5202 only)
The two input voltages U1 and U2 are passed through high-impedance input resistors
and differential amplifiers. The signal for the amplitude value is formed from this by
conversion and filtering . For zero-passage detection, the signal is filtered and passed
through a comparator. The signals prepared in this way are passed to the processor via
the A/D converter.
SYNCHROTACT 5
PCB: SYN 5013
abb
ABB Switzerland Ltd
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SYNCHROTACT 5
PCB: SYN 5012
U1
U2
U1
U2
Document No Art Part
PCB: SYN 5011
A
D
Amplitude
Zero-
crossing
Amplitude
Zero-
crossing
3BHS109762 E01
SYN 5201/SYN 5202
CPU
S00002
A
CPU
D
S00003
Language Revision page
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