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2 electronic brake rectifier, sk cu4-mbr, Electronic brake rectifier, sk cu4-mbr – NORD Drivesystems BU0180 User Manual

Page 55

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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

L

2

/

N

L

2

/

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

20

0…240 V~

Potential level:

= Brake

Potential level:

~ Mains

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