Power Supply Unit (Psu) - Siemens 7SR10 Argus Series Manual

Press ENTER key to confirm.
3.
4. The CB Open delay count-down starts and reaches to zero.
5. The configured BO and LED's for the CB OPEN control functions will operate.
6. Press RESET button to reset LED and BO states.
Repeat the same procedure for CB CLOSE control logic operation.
NOTE:
If the "Control Password" is already configured in the settings, use the control password to execute the CB
open/close via control keys. For more information about the Control Password function, see
NOTE:
If the operating mode of 7SR10 Relay is remote, the user can perform the CB open and close operations when
the "FUNCTION KEY CONFIG" setting is enabled.
2.4

Power Supply Unit (PSU)

The relay is supplied with the following nominal power supply ranges:
• 60 V - 240 V AC/DC power supply (BI threshold - 88 V AC/DC or 44 V AC/DC)
• 24 V - 60 V DC power supply (BI threshold - 19 V DC)
The power supply module is equipped with 3 or 6 Binary Inputs. It also consists of one RS485 communication
interface (half duplex) for communicating with RTUs and parameterization of relays via remote locations.
For AC connections, the auxiliary supply is made with the live connection to positive terminal and neutral
connection to negative for consistency and safety.
For DC connections, the auxiliary supply is made with the positive connection to Line terminal (L) and negative
connection to Neutral (N) for consistency and safety.
In the event of the supply voltage levels are falling below the relay minimum operate level, the PSU will
automatically switch off itself and latch out and this prevents any PSU overload conditions occurring. The PSU is
reset by switching the auxiliary supply off and on.
©2018 Siemens Protection Devices Limited
7SR10 Description of Operation
Section 6.9
Chapter 1 Page 16 of 77