1-4 Connection 3G3AX-RBU23/-RBU24 Connection Example 1 „ When the optional Braking Resistor 3G3AX-RBA/-RBB/-RBC is used The following is an example of connections using the Braking Resistor 3G3AX-RBA/-RBB/-RBC. Up to two units can be connected in parallel. For parallel connection, use Braking Resistors with the same resistance. For DIP switch settings, refer to "2-1 DIP Switch Setting"(page 2-1).
Design MC1 MC2 (*1) BSS RY RY BS MC1 MC2 EF MCB MC1 MC2 Inverter Motor 3-phase 200 V R S R/L1 S/L2 U/T1 V/T2 T T/L3 W/T3 P/+2 P P N SL1 SL2 AL1 AL2 RB 3G3AX-RBA /-RBB/-RBC N/- 1(AL1) 3G3AX-RBU23 /-RBU24 Master RB MA1MA2 2(AL2) P P P N SL1 SL2 AL1 AL2 RB 3G3AX-RBA /-RBB/-RBC 3G3AX-RBU23 /-RBU24 Slave 1(AL1) RB MA1MA2 2(AL2) P *1. To select RY, check the MC coil and RY contact specifications. •To prevent overheating, be sure to connect the alarm contacts 1 (AL1) and 2 (AL2) of the Braking Resistor. •The models of 3G3AX-RBU23/-RBU24 do not have terminals for the alarm input (R1, R2). Configure a sequence that enables the Inverter power to turn off when unusual overheating is detected. 1-12