External And Internal Brake Resistor - Beckhoff AX8000 Series Manual

7.3.5

External and internal brake resistor

Danger to life due to high voltage on the DC link capacitors of the
servo drive AX8000!
The DC link capacitors RB+ and RB- and the test contacts DC+ and DC- on the
supply, axis and option modules can carry life-threatening voltages of ≥ 875 V
Take the following measures to avert danger:
• After disconnecting the servo drive from the mains supply, wait until the voltage has
fallen below 50 V
• Measure the voltage on the test contacts properly.
• Secure the work area properly and wear the PPE.
Connection instructions
Before you can connect the external brake resistor, you have to remove the bridge between the
contacts "RB – " and "RB
Connect the PE connection of the brake resistor with the earthing bar of the control cabinet.
X01 – brake chopper output on AX8620
Infographic Terminal
point
R
B
R
B
X02 – brake chopper output on AX8640
Infographic Terminal
point
R
B
R
B
Multi axis servo system AX8000
. Only then is it safe to work.
DC
+".
INT
Connection
- Ext. brake resistor -
+ Ext. brake resistor +
Connection
- Ext. brake resistor -
+ Ext. brake resistor +
DANGER
Max. wire cross-section
2
6 mm (AWG 8)
Max. wire cross-section
2
16 mm (AWG 6)
Version: 1.6
Electrical installation
.
DC
Tightening torque
0.5 – 0.6 Nm
(4.4 – 5.3 lbf in)
Tightening torque
1.2 – 1.5 Nm
(10.6 – 13.3 lbf in)
45