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MSD Servo Drive Compact Operation Manual
34
Id no.: CA97555-001, Rev. 3.0 - Date: 06/2012
3.14.3 Connection of an external braking resistor
ATTENTION!
•
Be sure to follow the installation instructions for the external braking
resistor.
•
The temperature sensor (bimetal switch) on the braking resistor must be
wired in such a way that the power stage is deactivated and the connected
drive is disconnected from the mains supply if the braking resistor
overheats.
•
The minimum permissible connection resistance of the drive must not be
infringed – for technical data see section A.2 on page 49.
•
The braking resistor must be connected by a shielded cable.
Size C2 to C4
RB
L+
Braking
resistor
X1
Top
Fig. 3.17 Connection braking resistor
ATTENTION!
No additional external braking resistor of the C3 and C4
(G394-035 - G394-080) must be connected to the drive with integrated
braking resistor.
!
!
DANGER FROM ElECTRICAl TENSION!
Danger to life! Never wire or
disconnect electrical connections while these are live. Always disconnect the
power before working on the device. Dangerously high voltages of ≥50 V
may still be present 10 minutes after the power is cut (capacitor charging).
So always check that the power has been cut!
ATTENTION!
The external braking resistor must be monitored by the control.
The temperature of the braking resistor is monitored by a temperature
watchdog (Klixon). In the event of overheating the drive must be
disconnected from the mains supply.
Available braking resistors (excerpt)
Article
designation
Continuous
braking power
Resist-
ance
1)
Peak braking
power
2)
Protec-
tion
Fig.
CA59737-001
35 W
90 Ω
6250 W
IP54
Example:
CA59737-001
CA59738-001
150 W
6250 W
IP54
CA59739-001
300 W
6250 W
IP54
CA59740-001
1000 W
6250 W
IP65
1) Tolerance ±10%
2) The maximum possible braking power dependent on ON-time and cycle time
Table 3.16 Technical data - braking resistors
NOTE:
The available braking resistors with the exact specifications, in
particular with regard to surface temperature, maximum system voltage and
high-voltage strength, are set out in the MSD Servo Drive Ordering Catalog.
Please consult your projecting engineer for more detailed information on the design of
braking resistors.
!
