Manual
3 Options
BU 0180 GB-0914 Pre-series version 55
3.3.2 Electronic brake rectifier, SK CU4-MBR
The electronic brake rectifier SK CU4-MBR is used to control electromechanical brakes with a coil voltage of
180V DC and 205V DC (for sizes 5Nm to 40Nm via the frequency inverter or its accessories (SK xU4-IOE).
Monitoring of the current in the brake coil is integrated into the
SK CU4-MBR module.
• Mains voltage 230 V~ and 400 V~
• +24 V control voltage
• 1x Digital input (control)
• 1x Digital output (feedback)
• Brake connection (DC)
• Max. permissible permanent relay current 0.5 A
• Interference suppression class C2
• Permissible cycle time (1 switching cycle =1xON/1xOFF):
Brake 5…100 Nm: ≥ 0.5 s
The terminal bar of the customer unit SK CU4-MBR-… is divided into three potential levels.
According to the mains voltage, the mains cable must be connected to L1
E
(380 V~ … 480 V~) or L1
B
(200 V~ … 275 V~) and L2/N. The brake connection is made to Terminals 79/80. Assignment of the brakes
is made according to the following table. The module must be supplied with 24 V DC. Control is via Terminal
C5 by means of a digital output of the frequency inverter which is parameterised to the function {1} "External
brake". Feedback of the operating status of the brake (current/no current supplied to the brake) is via
Terminal B5 of the module.
Brake coil voltage
Mains voltage
Contact No.
205 V DC
230 V AC
L1
B
+ N/L2
180 V DC
400 V AC
L1
E
+ N/L2
205 V DC
460 V AC or 480V AC
L1
E
+ N/L2
L2 /
N
L2 /
N
L1
B
L1
B
L1
E
L1
E
79
80
B5
C5
40
44
L1 380…480 V~
L2 / N
Mains voltage
Connection of the 24 V power
supply from the SK 1x0E
Connection of DC brake coil
Potential level: 24 V DC
Potential level: = Brake
24V
GND / 0V
Connection to the terminal bar
of the SK CU4-MBR-…
DIN
MB+
MB-
(Select connection according to voltage)
…
1
40
43
SK CU4-
SK 1x0E-
Digital control in the SK CU4 via
DO from the SK 1x0E
DO
Feedback of operating status of the
brake from the DO of SK CU4
L1 200…240 V~
Potential level: = Brake
Potential level: ~ Mains
Similar to illustration