Safety Relevant Details - SCHNIER smart-E 310 Operating Manual

7.8.2.
The installed residual energy monitoring of the HV generators of the smart-E series is
designed redundant and 1-error safe. To maintain this advantage also in interactions
with the surrounding system, the following measures are absolutely required by the
user:
All safety relevant feedback
for residual energy in the sys-
tem may only be used by the
relay contact.
Superordinate controls must
be checked for each high
voltage start up to ensure that
the monitoring contact sig-
nals as "open".
It must check switch off of the
supply voltage (24 V DRIVE)
cyclically using the set DRIVE
power status bits of the HV
generator.
parts must be permanently
and conductively connected
using the high voltage out-
puts of the HV generators. A
maximum of 10 MOhms is
permitted
max. 500 VDC).
For a defective HV generator, all
high voltage carrying parts must
be grounded before touching
(e.g. using a grounding pole).
*) For expanded systems, we recommend the user to absolutely install another sepa-
rate residual monitor at another location, in order to achieve the 1-error safety for the
entire system.
Operating manual 810378-BAL-EN-170330

Safety relevant details

Measures
All high voltage
(measured
The used fieldbus is considered as
unsecure.
The feedback relay signals back via
the monitoring contacts, whether the
voltage at the output of the HV gener-
ator has
dangerous value (i.e. "safe" in the
sense of product standards). This is
an open normally-open contact. Thus
open means "dangerous". This pre-
vents short-circuits in the supply cable
or wire errors that can be confused
with a "closed" condition.
To detect and exclude wiring errors of
the 24 V supply (e.g. DRIVE and
CPU) or short circuits between both,
so the DRIVE is still supplied.
carrying Market observations have shown that
especially in robot use no 2 HV cable
is laid redundant. The HV connection
from the HV generator to the spray
system is with one channel. A defec-
tive or improperly plugged in HV cable
with can lead to false residual energy
measurements and falsely closed
relay contact.*
General safety measures for defec-
tive devices.
Mach/30 2017
Reason
discharged to a non-
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