Festo — CMMT-AS-...-S1 — 2021-04d
Product overview
21
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Exclude wiring faults in accordance with EN 61800-5-2
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Configure the safety relay unit to monitor the outputs of the safety relay unit and wiring up to the
servo drive
4.1.7
Safety relay unit
Use suitable safety relay units with the following characteristics:
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2-channel outputs with
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Detection of shorts across contacts
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Required output current (also for STO)
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Low test pulses up to a maximum length of 1 ms
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Evaluation of the diagnostic outputs of the servo drive
Safety relay units with high test impulses can be used with the following restrictions:
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Test impulses up to 1 ms in length
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Test impulses are not simultaneous/overlapping on #STO-A/B and #SBC-A/B
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The resulting safety-related classification depends on the evaluation of diagnostic feedbacks STA,
SBA
9.1 Technical data, safety engineering, safety reference data STO and SBC.
The safety relay units Pilz PNOZmulti, Pilz PNOZmulti Mini or SIEMENS ET 200SP with PP-switching
output modules, for example, would be suitable.
4.1.8
Interfaces of the PDS
The interfaces of the PDS(SR) (Power Drive System, safety related) to the outside world are:
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Power supply
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Inputs and diagnostic check-back signals
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Movement of the shaft
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Output for controlling a second brake
Interfaces of the PDS
Fig. 12: Interfaces of the PDS
