Introduction
1-4 7SJ62 Manual
C53000-G1140-C121-1
A separate Service Port can be provided for remote communications via a modem,
or substation computer. The SIPROTEC
®
4 operating program DIGSI
®
4 is required.
All 7SJ62 data can be transferred to a central control and monitor system (RTU/SCA-
DA) through the Scada Port. Various protocols and physical interfaces are available
to suit the particular application.
Power Supply The 7SJ62 can be supplied with any of the common power supply voltages from 24
VDC to 250 VDC. The device can also be supplied with 115 VAC or 230 VAC. Momen-
tary dips of the supply voltage up to 50 ms are bridged by a capacitor (see Technical
Data, Sub-section 10.1). Voltage dips can occur, for example, if the voltage supply
system (substation battery) becomes short-circuited or experiences a severe variation
in load.
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