Basic units in the power range of 15 ... 90 kW
Connection of r elay output KSR for ”Safe standstill”
7
Extensions for automation
7.4
7.4.9
L
7.4-17
EDS82EV903-1.0-11/2002
7.4.9 Connection of relay output K
SR
for ”Safe standstill”
(only active with variant E82EVxxxK4Cx 4 x) 31
Controller variant x4x supports the safety function ”Safe standstill”,protection
against unintended start,accordingto therequirements ofEN954-1and EN1037.
Depending on the external circuitry it is possible to reach ”Category 3” to EN
954-1.
For this purpose the controllers have an integrated safety relay with feedback
contact. The safety relay switches off the voltage supply of the optocoupler for
pulse transfer to the IGBT. It must be externally controlled with DC +24 V.
l Only skilled personnel is authorized to install and commission the function
”Safe standstill”.
l All safety-relevant external cables (e.g. control cable for the safety relay,
feedback contact) must be protected, e. g. in the cable duct. Ensure that
short-circuits and lateral connection cannot occur!
l If external forces act on the drive axes, additional brakes are necessary.
Especially consider the force of gravity acting on suspended loads!
l After the initial commissioning the operator must check the function of the
safety circuits. This must be repeated periodically.
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l The electrical reference point for the coil of the safety relay
must be connected with the protective circuit (DIN EN 60204-1
Abs. 9.4.3)!
– Only in this way the protection against faulty operation is
guaranteed.
l Without additional measures the function ”Safe standstill” does
not provide an ”Emergency-off”:
– There is neither an electrical isolation between motor and
controller nor a ”service switch” or a ”repair switch”
– An ”Emergency-off” requires an electrical isolation, e.g. by
means of a central mains contactor!
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