7SR21 & 7SR22 Performance Specification
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1.3 Functional Performance
1.3.1 Instrumentation
Instrument Value Reference Typical accuracy
I Current 0.1In to 2.0In
± 1 % or ± 1 % In
V Voltage 0.1Vn to 1.2Vn
± 1 % or ± 1 % Vn
Power, real and apparent
V = Vn, I ³ 0.1 xIn, pf ³ 0.8 ± 3 % Pn, where Pn = Vn x In
pf Power factor
V = Vn, I ³ 0.1 xIn, pf ³ 0.8 ± 0.05
1.3.2 USB Data Communication Interface
Attribute Value
Physical layer Electrical
Connectors USB-Type B
1.3.3 Fibre Optic Serial Data Communication Interface (Optional Rear Mounted
Port)
Attribute Value
Physical layer Fibre-optic
Connectors ST
TM
(BFOC/2.5)
Recommended fibre
62.5/125 mm glass fibre with ST connector
Optical Wavelength 820 nm
Launch power (into recommended fibre) -16 dBm
Receiver sensitivity -24 dBm
1.3.4 RS485 Data Communication Interface (Standard Rear Port)
Attribute Value
Physical layer Electrical
Connectors 4 mm Ring Crimp
1.3.5 RS485 Data Communication Interface (Optional Rear Mounted Port)
Attribute Value
Physical layer Electrical
Connectors 4-way Plug
1.3.6 RS232 Data Communication Interface (Optional Rear Mounted Port)
Attribute Value
Physical layer Electrical
Connectors 9-way D-plug
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