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2 Engineering
2.13 External brake
74
Rapid Link 5 · RAMO5 · RASP5
05/20 MN034004EN
www.eaton.com
2.13 External brake
A mechanical spring-loaded brake fitted to the motor (disc or spring-applied
brake) brakes the rotation of the motor shaft if the brake coil’s supply voltage
is switched off. If quick brake engagement times are required, DC air soleno-
ids are used. In this case, the brake is supplied with AC power through a
functional rectifier built into the motor.
RAMO5 and RASP5 Rapid Link 5 modules feature a fast, internal electronic
switch for powering and actuating the external motor brake. It is connected
using pin 4 and pin 6 of the motor feeder socket. The highest permissible
continuous holding current is 0.6 A. For releasing the brake, up to 6 A are
available for up to 120 ms.
The brake is actuated
•
Automatically with the Start command in Auto and Manual modes in
RAMO5,
•
With RASP5 via the frequency converter.
RAMO5-xx1…
RAMO5-xx2…
RAMO5-xx4…
Figure 34:
External brake actuated with 180 V DC, 230 V AC/277 V AC or 400 V AC/480 V AC
M
3 ∼
6
4
B1
B2
1
3
180 V DC
L1
L3
1
4
L1
N
B2
230/277 V AC
0.6 A
u
M
3 ~
6
4
B1
1
3
6
4
B1
B2
400/480 V AC
0.6 A
u
M
3 ~
L1
L3