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JetMove 3000 Supply Unit
3.9
Brake chopper connection
In generator operation, e.g. when the drive is braking, the motor feeds energy back into the servo amplifi-
er. This increases the voltage in the DC link. If the voltage exceeds a threshold value, the internal braking
transistor in the supply unit is switched on and the regenerative energy is converted into heat by means of
a brake resistor.
The JM-3000 supply unit always requires a brake resistor. You can choose between an external brake
resistor or the model "Supply unit with integrated brake resistor" (see order number code).
3.9.1 Connecting an external brake resistor
Ter-
Ref.
minal
X1
• Brake resistor connection
• Cable cross section:
6 mm
BR
• For technical data refer to Table A.2 on
page 63, and Table A.4 on page 65
• The connection must be shielded
• Terminal for temperature monitoring
J
(Klixon) of the brake resistor
• Cable shield connection (for shield lug)
• Connect PE connection on the brake resis-
tor to the PE stud located on the top of the
PE
device.
For layout see see Fig. Fig. 3.9, and see Fig. Fig. 3.10.
1) If no temperature monitoring is connected, the connections X1-ϑ must be bridged!
2) Connector set not included in the scope of delivery.
Table 3.9 Connection of brake resistor with temperature monitoring to X1 BG 1 and BG 2
DANGER!
46
Specification
maximum
2
1)
DANGER TO LIFE DUE TO ELECTRICAL VOLTAGE
IGNORING THESE INSTRUCTIONS MAY RESULT IN INJURY OR
DEATH.
•
The BR terminal is permanently connected to DC link potential
(> 300 V DC).
•
Never wire or loosen live electrical connections! Before perform-
ing any kind of work, disconnect the device from the mains sup-
ply. Dangerous high voltages ≥ 50 V may be present even
10 minutes after disconnection from mains power (capacitor
charge). Therefore, always check that there is no voltage.
Terminal
ϑ
ϑ
BR
BR
2)
• see Fig. Fig. 3.11
Installation
X1
Jetter AG
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