Siemens 7SR157 Argus, Manual, Page: 64 / 180

7SR158 Technical Manual
Chapter 3 - Page 8 of 18 © 2022 Siemens Protection Devices Limited
1.3 Functional performance
1.3.1
Instrumentation
Instrument Value Reference Typical accuracy
V Voltage 0.1 x Vn ≤ V ≤ 1.2 x Vn

1 % Vn
F Frequency
F = 47.5 to 52.5Hz @ 50Hz
and 57 to 63Hz @60Hz
± 10mHz
1.3.2
Data Communication
1.3.2.1 USB 2.0 Data Communication Interface
Attribute Value
Physical layer Electrical
Connectors USB-Type B
1.3.2.2 RS485 Data Communication Interface
Attribute Value
Physical layer Electrical
Connectors 4mm Ring Crimp
1.3.2.3 Fibre Optic Ethernet Data Communication Interface (IEC 61850 Option)
Attribute Value
Physical layer Fibre-optic
Connectors Duplex LC 100BaseF in acc. With IEEE802.3
Recommended fibre 62.5/125

m glass fibre with Duplex-LC connector
Transmission Speed 100 MBits/s
Optical Wavelength 1300 nm
Bridgeable distance 2 km
1.3.2.4 Electrical Ethernet Data Communication Interface (IEC 61850 Option)
Attribute Value
Physical layer Electrical
Connectors RJ45 100BaseT in acc. With IEEE802.3
Transmission Speed 100 MBits/s
Test Voltage (with regard to socket) 500 VAC 50 Hz
Bridgeable distance 20 m
1.3.3
Real Time Clock
The specification below applies only while no external synchronisation signal (e.g. 60870-5-103) is being
received.
Attribute Value
Accuracy (-10 to +55
o
C)

3.5 ppm (no auxiliary supply connected)

100 ppm (auxiliary supply connected)