Function description
Operating Manual PMCprotego S12(C)
1002528EN03
37
4.3.7
Safe Direction SDI
The safety function "safe direction" (SDI) monitors the defined direction of rotation of the
drive axis (clockwise or anticlockwise).
Input and output assignment in the Configurator:
}
Inputs I0 ... I6
– SDI Neg. Activate
– SDI Pos. Activate
}
Outputs O0 … O3
– SDA Safe Direction Acknowledge
Prerequisites for normal operation:
}
Input "SS1 Activate" and "SS1 SIL3/Reset": "1" Signal (+24 VDC)
}
"Ready" output: "1" Signal (+24 VDC). The safety card is ready for operation.
}
"STO Acknowledge" output: “0” Signal
}
Input "SDI Pos Activate": "1" Signal (+24 VDC)
}
Input "SDI Neg Activate": "1" Signal (+24 VDC)
}
To achieve SIL3 or PL e: Connect the output "STO SIL3" to servo amplifier terminal
X4A/ 3.
The safety function is activated via
}
1/0 pulse edge at the input "SDI Pos Activate"
or
}
1/0 pulse edge at the input "SDI Neg Activate"
Reaction:
}
SDI delay time starts
}
Once the SDI delay time has elapsed, the direction of rotation is monitored
}
Output "SDA Safe Direction Acknowledge": "1" signal
}
If the direction of rotation is violated, safety function SS1 (ESTOP braking ramp) is ac
tivated.
