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Festo — CMMT-AS-...-S1 — 2021-04d
Installation
1
2
3
4
Fig. 14: SBC sample circuit
1 Input device for safety request (e.g. light
curtain)
2 Safety relay unit
3 Servo drive CMMT-AS
4 Control (here solenoid valve example) of
the clamping unit
Information on the sample circuit
The safety request is passed on to the servo drive on 2 channels via the inputs #SBC-A and #SBC-B at
the connection [X1A].
–
The request via the input #SBC-A switches off power to the signals BR+ and BR- at the connection
[X6B]. This de-energises and closes the holding brake.
–
The request via the input #SBC-B switches off power to the signal BR-EXT at the connection [X1C].
This shuts off power to the control of the external clamping unit. The clamping unit closes.
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The safety relay unit monitors the SBA diagnostic output and checks whether the safe status has
been reached for the safety sub-function SBC.
