l The multi-wired cables connected to the multi-pole connectors must be terminated with cable
lugs or other appropriate devices.
l The verification of the two channels of the signal wiring must be protected from short circuit to
voltage sources and should never be exposed to voltage external to the verification signal, even
in case of failure.
l The safety system must be validated according to UNI EN ISO 13949-2: 2013
10.8 Safe Torque Off Installation and Maintenance Procedure
The following method of installation and maintenance should always be performed as indicated and by
qualified personnel who are familiar with the safety procedures required by current regulations:
l
On the first start
l
At restart in the event that a fault has been detected and removed
l
Otherwise, at least every 8 hours
Run the sequence of on/off commutation shown in the following figure by providing +24 VDC and 0V
on the two input channels connected to the X4-X14 connector; perform a plausibility check with
monitoring signals:
l Hardware feedbacks: on the connectors, check electrical contact and /or voltage
levels
l Software feedback: check the "INTERLOCK STATUS" parameter value, object 60FD (digital
inputs), bit 3, defined by the standard IEC 61800-7-201, CIA 402
WARNING:Personal injury and property damage risk.
If one of the conditions in the following figure is not met, the STO function cannot
be used, which may result in death or serious injury to personnel, or damage to
equipment.
Ø After the fault has been removed, the procedure must be repeated.
The following figure illustrates the STO mandatory sequence circuit test.
PN: L-MAM2-E-201
Moog Casella DM2020 Installation and Startup Guide
10.8 Safe Torque Off Installation and Maintenance Procedure
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