SE-SR2
Operating instructions SE-SR2
826002433-EN-Rev.C
8
Function Description
The relay SE-SR2 provides a safety-oriented interruption of a safety circuit. When operating
voltage is supplied the "POWER" LED will light up. The unit is ready for operation when the
start circuit S12-S34 is closed.
}
Input circuit is closed (e.g. light grid not interrupted):
–
The LEDs "CH.1" and "CH.2" are lit.
–
Safety contacts 13-14, 23-24 and 33-34 are closed, auxiliary contact 41-42 is open.
The unit is active.
}
Input circuit is opened (e.g. light grid interrupted):
–
The LEDs "CH.1" and "CH.2" go out.
–
Safety contacts 13-14, 23-24 and 33-34 are opened redundantly, auxiliary contact
41-42 is closed.
Operating modes
}
Dual-channel operation without detection of shorts across contacts: Redundant input
circuit, detects SE-SR2
–
earth faults in the start and input circuit,
–
short circuits in the input circuit.
}
Automatic start: Unit is active once the input circuit has been closed.
}
Manual start without control: Unit is active once the input circuit and the start circuit are
closed.
}
Manual start with control: Unit is active once the input circuit is closed and once the
start circuit is closed after the waiting period has elapsed (
).
}
Increase in the number of available contacts by connecting contact expander modules
or external contactors/relays.
Timing diagram
[1]
[1]
[2]
[2]
[3]
[3]
Legend
}
Power: Supply voltage
}
Start: Start circuit
}
Input: Input circuit
