Jetter JM-204-480, User Manual, Page: 64 / 126

7 Description of Connections
64 Jetter AG
7.6 External Ballast Resistor and DC
Link Connection
Ballast System
When a mechanic system is braked by the motor, the energy will be given back to
the servo amplifier. This energy is led to the ballast resistor to convert it into heat.
The ballast resistor is switched into the DC link circuit by the ballast circuit.
The JetMove 204-480 is supplied with an internal ballast resistor. If the power that is
supplied back is too high for the internal resistor, an external ballast resistor can be
added. It is also possible to run the JetMove 204-480 with an external ballast resistor
only.
Connection of External Ballast Resistor and DC link
Circuit of Another JM-204-480
Field Wiring Terminals
X63
Connector Pin Assignment
U
B
- Negative pole of the DC link voltage
U
B
+ Positive pole of the DC link voltage
BR
int
Connection with the internal ballast resistor (for this
purpose, it must be connected with BR
c
)
BR
c
Reference potential for the ballasting circuit
Danger
HAZARD caused by high operating voltage!
Extremely hazardous voltages of up to 850 V may occur!
Please, observe the following precautions in order to avoid injuries such as
muscle cramps, burns, unconsciousness, respiratory standstill, etc., and possibly
death:
A high DC link voltage is applied to each of the eight terminals X63!
Please do never establish a connection to these terminals, while power is
being supplied to the JetMove 204-480 or up to 7 minutes after having
separated the JetMove 204-480 from the power supply.