Functional Performance; Instrumentation; Usb Data Communication Interface; Fibre Optic Serial Data Communication Interface (Optional Rear Mounted Port) - Siemens Argus 7SR21 Technical Manual

1.3

Functional Performance

1.3.1

Instrumentation

Instrument Value
I Current
V Voltage
Power, real and apparent
pf Power factor
1.3.2

USB Data Communication Interface

Attribute
Physical layer
Connectors
1.3.3 Fibre Optic Serial Data Communication Interface (Optional Rear Mounted
Port)
Attribute
Physical layer
Connectors
Recommended fibre
Optical Wavelength
Launch power (into recommended fibre)
Receiver sensitivity
1.3.4

RS485 Data Communication Interface (Standard Rear Port)

Attribute
Physical layer
Connectors
1.3.5

RS485 Data Communication Interface (Optional Rear Mounted Port)

Attribute
Physical layer
Connectors
1.3.6

RS232 Data Communication Interface (Optional Rear Mounted Port)

Attribute
Physical layer
Connectors
Unrestricted © 2013 Siemens Protection Devices Limited
7SR21 & 7SR22 Performance Specification
Reference
0.1In to 2.0In
0.1Vn to 1.2Vn
V = Vn, I ³ 0.1 xIn, pf ³ 0.8
V = Vn, I ³ 0.1 xIn, pf ³ 0.8
Value
Electrical
USB-Type B
Value
Fibre-optic
TM
ST (BFOC/2.5)
62.5/125 mm glass fibre with ST connector
820 nm
-16 dBm
-24 dBm
Value
Electrical
4 mm Ring Crimp
Value
Electrical
4-way Plug
Value
Electrical
9-way D-plug
Typical accuracy
± 1 % or ± 1 % In
± 1 % or ± 1 % Vn
± 3 % Pn, where Pn = Vn x In
± 0.05
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