1-1 Wiring When multiple resistors are used in combination, a voltage rise during switching is increased due to the internal inductive components of the resistor. In this case, increase the cable size, or twist the cable. For the Braking Resistor, use a non-inductive resistor. Do not use six or more resistors in combina- tion. 1 Design For connections on the PCB terminal block, be sure to use crimp terminals with insulation coating. To use the optional Braking Resistor, select the model with combined resistance higher than the specified connectable resistance.
If a resistor whose resistance is less than the connectable resis- tance is used, it may result in a fault of the Regenerative Braking Unit. Use thorough caution in re- gards to the resistance. When using these Braking Resistors, be sure to remove the built-in resistor. (3G3AX-RBU21/- RBU22/-RBU41 only) 1-2 Model (3G3AX-) Connectable resistance RBU21 17 Ω min. RBU22 17 Ω min. RBU23 4 Ω min. RBU24 2 Ω min. RBU41 34 Ω min. RBU42 10 Ω min. RBU43 6 Ω min.