Pilz PMCprotego D.48 Operating Manual page 42

Function Description
Safety function STO, digital inputs STO1-ENABLE (X4/7), STO2-ENABLE (X4/5)
The two digital inputs STO1-ENABLE (1st shutdown route) and STO2-ENABLE (2nd shut-
down route) are used to shut down the inverted rectifier safely.
Functions when operated without a safety card:
}
The digital inputs STO1-ENABLE and STO2-ENABLE enable the inverted rectifier on
the servo amplifier.
}
Single or dual-channel activation of the safety function STO is possible.
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The servo amplifier is ready for operation when there is a 24 V signal at the inputs.
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If the STO1-ENABLE and/or STO2-ENABLE input is open, no more power is trans-
ferred to the motor. The drive becomes torque-free and runs down.
}
In conjunction with the output from a safety relay or safety control system, you can
safely prevent the drive from restarting.
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Requirements of the outputs on a safety control system or safety relay:
–
–
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If the safety function STO is not needed, STO1-ENABLE and STO2-ENABLE must be
connected directly to 24 V.
}
Volt-free, reference earth is XGND
Functions when operated with a safety card:
} PL e (Cat. 4) and SIL CL 3 can be achieved.
}
Volt-free, reference earth is XGND
}
STO1-ENABLE
The input STO1-ENABLE is not active, so does not need to be wired.
}
STO2-ENABLE
–
–
–
–
Operating Manual PMCprotego D.48, PMCprotego D.72
1001735-EN-04
Single-channel activation of STO without feedback: PL d (Cat. 2) of
EN ISO 13849-1, SIL CL 2 of EN/IEC 62061
Dual-channel activation of STO with feedback: PL e (Cat. 4) of EN ISO 13849-1,
SIL CL 3 of EN/IEC 62061
If the STO2-ENABLE input is open, no more power is transferred to the motor. The
drive becomes torque-free and runs down.
STO single-channel with safety card PMCprotego S1 or PMCprotego S2:
The input STO2-ENABLE must be connected directly to 24 V. The 2nd shutdown
route is not needed.
STO dual-channel with safety card PMCprotego S1:
The input STO2-ENABLE must be connected to the output STO SIL3 on the safety
card.
If the safety function STO is not needed, STO2-ENABLE must be connected dir-
ectly to 24 V.
INFORMATION
Further information is available in the section entitled "Safety function STO".
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