Lenze EMB934 Serie Manuel D'instructions page 126

5 Electrical installation
Circuit proposals
Controlled shutdown of the drive system
5.5.2 Controlled shutdown of the drive system
For controlled shutdown of the drive network additional 935X brake choppers have to be
installed in the network.
The same circuit principle can be used if more braking energy than permissible in the
feedback operation is to be dissipated.
Stop!
The regenerative power supply module may be destroyed if the feedback
operation of the regenerative power supply module and the brake chopper are
active at the same time.
For this reason, the circuit must be arranged so that the feedback operation
will be inhibited when the DC-bus voltage reaches impermissible values.
L1 L2 L3
L3' L2' L1' L3.2 L2.2 L1.2
Fig.13-14
126
F4 F5
PE L1 L2 L3
+UG -UG
934x
E1 39 A1 A2 59 PE U V W
K10
+
24 V DC
=
_
FAIL
Z4
Circuit proposal - controlled shutdown of the drive system
934X Regenerative power supply module
Z2.1 ... Z2.n Controllers in the drive system
935x Brake chopper with brake resistor
Z4 Higher-level control (PLC, PC)
K10 Signalling relay "DC bus voltage too high"
F4...F9 DC-bus fuses
F6 F7
PE L1 L2
+UG -UG +UG -UG
935x
Z2.1
28 Ex 39 59 Ax PE U V W
K10
F8 F9
L3 PE
+UG -UG +UG -UG
935x
Z2.n
28 Ex 39 59 Ax
9340vrm009
EDBMB9340 DE/EN/FR 9.0