Control Techniques Unidrive M600 Installation Sheet page 2

Figure 1-5 Inserting the brake resistor cable through the bung
• Feed the brake resistor bung on to the outer insulation of the brake
resistor cable. The wider end of the bung should be inserted first.
The narrow end should then align with the end of insulation.
Step 4: Secure the braking resistor
Figure 1-6 Installing the brake resistor
• Secure the braking resistor using captive M4 (x2) screws as shown
above. The screws should be tightened to a maximum torque of
2 N m (1.5 lb ft).
• Route the brake resistor cable and bung through the hole on the top
left corner of the drive as shown above (Figure 1-6). The bung
should penetrate as far as possible into the hole. Ensure the cables
are routed between the fins of the heatsink, and the cables are not
trapped between the heatsink fins and the resistor.
• Cut 70 mm (2.76 in) length off from one of the cables. Strip about 10
mm (0.39 in) of insulation from both of the cables and terminate the
cables with the crimps provided.
Step 5: Establishing brake resistor electrical connections
Figure 1-7 Electrical connections
• Connect the brake resistor cables to BR and +DC terminals as
shown above. Tighten the screw terminals to a maximum torque of
1.5 N m (1.1 lb ft).
• Replace the internal EMC Filter. When replacing the EMC filter the
screw and nut should be tightened to a maximum torque of 1.5 N m
(1.1 lb ft).
• Replace both terminal covers. When replacing the terminal covers
the screw should be tightened to a maximum torque of 1 N m (0.7 lb
ft).
Failure to observe the following information may damage
the resistor.
Parameter settings
CAUTION
Fan speed should be set to a maximum (Pr 06.045 to 11). The
drive software contains an overload protection function for a
braking resistor. On size 3 this function is enabled at default to
protect the heatsink mounted braking resistor. Below are the
parameter settings.
Parameter
Braking Resistor Rated
Power
Braking Resistor Thermal
Time Constant
Braking Resistor
Resistance
For more information on the braking resistor software overload
protection, see the Parameter Reference Guide.
Resistor specification
Parameter
DC resistance at 25 °C
Peak instantaneous power over 1 ms at nominal
resistance
Average power over 60 s
Ingress Protection (IP) rating
Maximum altitude
Heatsink mounted
braking resitor
BR
+DC
Internal
EMC filter
-DC
3
Size 3
200V Drive 400V Drive
Pr 10.030 50 W
Pr 10.031 3.3 s
Pr 10.061 75 Ω
Value
75 Ω
8 kW
50 W
IP54
2000 m
0478-0015-04