1-2 Terminals 1 Terminal Description Design 1-5 Terminal name Terminal symbol Description Main circuit terminal N Connect to the N/− terminal of the Inverter. RB Connect to the Braking Resistor. With the default connection, this terminal is connected to the built- in resistor. (Only for the models 3G3AX-RBU21/-RBU22/-RBU41) P Connect to the P/+2 terminal of the Inverter. P Connect to the Braking Resistor. With the default connection, this terminal is connected to the built- in resistor. (Only for the models 3G3AX-RBU21/-RBU22/-RBU41) Control circuit terminal SL1 SL2 Connect to the MA1 and MA2 terminals of a master unit when used as slave unit terminals in parallel operation.
MA1 MA2 Connect to the SL1 and SL2 terminals of a slave unit when used as master unit terminals in parallel operation. Alarm terminal AL1 AL2 The alarm output terminals for the Regenerative Braking Unit. Provide a circuit to turn off the primary power supply for the Invert- er when the temperature relay of the built-in resistor or optional Braking Resistor is activated. R1 R2 Connect to the AL1, AL2 (1, 2) terminals of the Braking Resistor when the optional Braking Resistor is used. Short-circuit between the AL1 and AL2 terminals when the option- al Braking Resistor is not used. (Only for the models 3G3AX-RBU21/-RBU22/-RBU41)