Braking operation
Lenze brake resistors
Connection of external brake resistor
12
12.2
12.2.4

12.2−3
EDSVF9383V EN 7.1−04/2012
12.2.4 Connection of external brake resistor
PES
BR1 BR2
Z1
PES
J
RB
RB
RB2 T1RB1 T2
9300VEC033
Fig. 12.2−2 Brake resistor connection
RB1, RB2 Controller terminals for connecting the brake resistor
Z1 Brake resistor
PES HF−shield end by PE connection through shield bracket.
Æ’ Brake resistors can get hot and under certain conditions a brake
resistor can even burn down. For this reason, the brake resistors must
be mounted so that the possibly high temperatures cannot cause any
damage.
Æ’ Provide a safety shutdown in the event the brake resistor overheats.
Æ’ Use the thermal contacts of the brake resistor (e.g. T1 / T2) as control
contacts to disconnect the controller from the cable!
Æ’ Only use shielded brake resistor cables.
Æ’ Connect the shield close to the controller and close to the brake resistor
with a surface as large as possible to the mounting plate by using a
shield clamp.
Æ’ The shield of the control cables for digital signals (temperature
monitoring T1 / T2) must be connected at both sides (controller and
brake resistor).
Æ’ Unshielded cables between shield clamp and connection terminals
must not be longer than 40 mm.
Important notes
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