1-4 Connection „ When the optional Braking Resistor 3G3AX-RBA/-RBB/-RBC is used 1 The following is an example of connections using the Braking Resistor 3G3AX-RBA/-RBB/-RBC. Up to five units can be connected in parallel. For parallel connection, use Braking Resistors with the same resistance. Be sure to remove the built-in resistor from the bottom of the Regenerative Braking Unit. For DIP switch settings, refer to "2-1 DIP Switch Setting"(page 2-1).
Design MC1 MC2 RY (*1) BSS RY MC1 BS MC2 MCB MC1 EF R MC2 R/L1 Inverter U/T1 3-phase 200 V S S/L2 V/T2 Motor T T/L3 W/T3 3G3AX-RBA /-RBB/-RBC P/+2 P P N SL1 SL2 AL1 AL2 RB 3G3AX-RBU21 /-RBU22 Master N/- R2 MA1MA2 R1 1(AL1) 2(AL2) P RB 3G3AX-RBA /-RBB/-RBC Alarm terminal internal connections 3G3AX-RBA /-RBB/-RBC P P N SL1 SL2 AL1 AL2 RB 3G3AX-RBU21 /-RBU22 Slave AL1 AL2 R2 MA1MA2 R1 Built-in resistance temperature relay 1 (AL1) R1 2 (AL2) R2 3G3AX-RBA /-RBB/-RBC Temperature relay P P N SL1 SL2 AL1 AL2 RB 3G3AX-RBU21 /-RBU22 Slave R2 MA1MA2 R1 *1. To select RY, check the MC coil and RY contact specifications.
•To use the Braking Resistor (3G3AX-RBA/-RBB/-RBC), be sure to remove the built-in resistor. If the Braking Resistor (3G3AX-RBA/-RBB/-RBC) is used with the built-in resistor connected, it may cause the built-in resistor to burn due to overheating, or result in an overheating detection failure when the Braking Resistor temperature relay is activated. •To prevent overheating, be sure to connect the alarm contacts 1 (AL1) and 2 (AL2) of the Braking Resistor. 1-8 1(AL1)RB 2(AL2) P 1(AL1)RB 2(AL2) P