4.6.9 Brake Resistor Temperature Switch
Frame size D-E-F
Torque: 0.5-0.6 Nm (5 in-lbs)
Screw size: M3
This input can be used to monitor the temperature of an externally connected brake resistor. If the connection between 104 and 106 is removed, the
frequency converter will trip on warning / alarm 27, “Brake IGBT”.
A KLIXON switch must be installed that is `normally closed' in series with the existing connection on either 106 or 104. Any connection to this terminal
must be double insulated to high voltage to maintain PELV.
Normally closed: 104-106 (factory installed jumper).
Terminal No. Function
106, 104, 105 Brake resistor temperature switch.
If the temperature of the brake resistor gets too high
and the thermal switch drops out, the frequency con-
verter will stop braking. The motor will start coasting.
4.6.10 Load Sharing
Terminal No. Function
88, 89 Loadsharing
The connection cable must be screened and the max. length from the frequency converter to the DC bar is limited to 25 metres (82 feet).
Load sharing enables linking of the DC intermediate circuits of several frequency converters.
Please note that voltages up to 1099 VDC may occur on the terminals.
Load Sharing calls for extra equipment and safety considerations. For further information, see load sharing Instructions MI.50.NX.YY.
Please note that mains disconnect may not isolate the frequency converter due to DC link connection
VLT AQUA Low Harmonic Drive Operating In-
structions 4 How to Install
MG.20.T1.02 - VLT
®
is a registered Danfoss trademark 53
4
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