Lenze ECS series - Manual (Page 28)

Safety
Residual hazards
Residual hazards - ECSxA axis module
2

28 EDKCSXX0XX DE/EN/FR/ES/IT 4.0
2.3.2 Residual hazards - ECSxA axis module
Protection of persons
ƒ Before working on the axis module, check that no voltage is applied to the power
terminals
– because the power terminals +UG, -UG, U, V and W carry hazardous voltages for at
least 3 minutes after mains disconnection at the supply module.
– because the power terminals +UG, -UG, U, V and W carry hazardous voltages when
the motor is stopped.
ƒ The heatsink has an operating temperature of > 70 °C:
– Direct skin contact with the heatsink results in burnings.
ƒ The leakage current to PE is > 3.5 mA AC or > 10 mA DC. Therefore, two PE
connections are installed for protective reasons.
– Comply with the requirements of EN 50178 for high leakage currents!
Protection of devices
ƒ All pluggable terminals must only be connected or disconnected when no voltage is
applied!
ƒ The power terminals +UG, -UG, U, V, W and PE are not protected against polarity
reversal.
– Observe the polarity when wiring the power terminals!
ƒ Only when all devices of the interconnected power system are ready for operation,
power can be applied. Otherwise, the input current limitation may be destroyed.
Connecting and disconnecting the supply module cyclically to and from the mains can
overload and destroy the input current limitation of the axis module
ƒ if the axis module is supplied via the ECSxE supply module and the input current
limitation is deactivated depending on the DC bus voltage (C0175 = 1 or 2).
ƒ if the axis module is not supplied via a supply module delivered by Lenze.
ƒ if the 24 V supply is switched off.
Under these operating conditionsallow a breakofatleast3 minutesbetween twostarting
operations in the case of cyclic mains switching over a longer period of time!
Motor protection
ƒ Some settings of the axis module can cause the connected motor to overheat, e.g.
longer operation of self-ventilated motors with low speeds.
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