Lenze i750 - Brake Resistor Connection; DC-Bus Connection

Brake resistor c
onnecon
The brake resistor is connected to terminal X103 on the supplier.
Use intrinsically safe brake resistors to be able to dispense with a separate
s
witch-o device (e.g. a contactor).
Short c
onnecon cables up to 0.5 m Long connecon cables up to max. 5 m
Up to a cable length of 0.5 m, the cable for the brake resistor and that of
the temperature monitoring can be twisted. Doing so reduces problems
due to EMC interference.
The cable of the brake resistor must be shielded.
The maximum length is 5 m.
Twisng is sucient for the temperature monitoring cable.
R
B
RB1 RB2
①
②
< 0.5 m
T1 T2
R
B
RB1 RB2
< 5 m
T1 T2
+
"
"
①
②
① Wiring to the "brake resistor" c
onnecon on the component with brake chopper.
② Oponal: Wiring to a control contact that is set to monitor the thermal contact.
If the thermal contact responds, the voltage supply to the component with brake chopper must be disconnected (e.g. switch o the control
of the mains contactor).
DC-bus c
onnecon
Detailed informaon on the DC-bus connecon can be found here: 4DC-bus
connecon
Electrical ins
tallaon
Brake resistor connecon
65