Fibre Optic Ethernet Data Communication Interface (Iec 61850 Option); Electrical Ethernet Data Communication Interface (Iec 61850 Option); Real Time Clock - Siemens Argus 7SR21 Technical Manual

7SR21 & 7SR22 Performance Specification

1.3.7 Fibre Optic Ethernet Data Communication Interface (IEC 61850 Option)

Attribute
Physical layer
Connectors
Recommended fibre
Transmission Speed
Optical Wavelength
Bridgeable distance

1.3.8 Electrical Ethernet Data Communication Interface (IEC 61850 Option)

Attribute
Physical layer
Connectors
Transmission Speed
Test Voltage (with regard to socket)
Bridgeable distance
1.3.9

Real Time Clock

1.3.9.1 Internal Clock
The specification below applies only while no external synchronisation signal (e.g. IRIG-B, IEC 60870-5-103) is
being received.
Attribute
o
Accuracy (- 10 C to + 55
1.3.9.2 IRIG-B (Inter Range Instrumentation Group)-B
Attribute
Connector
Signal Type
Applied signal level
Signal : carrier ratio
Impedance
*Cable impedance is irrelevant. The cable does not need to have a termination resistor fitted.
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Value
Fibre-optic
Duplex LC 100BaseF in acc. With IEEE802.3
62.5/125 mm glass fibre with Duplex-LC connector
100 MBits/s
1300 nm
2 km
Value
Electrical
RJ45 100BaseF in acc. With IEEE802.3
100 MBits/s
500 VAC 50 Hz
20 m
Value
o ± 100 ppm
C)
Value
BNC
IRIG-B 120, 122 or 123
minimum 3 V, maximum 6 V, peak-to-peak
3:1
4 kOhm
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