2.5 Main circuit terminals 1 2.5.1 Details on the main circuit terminals 2 3 4 5 6 7 8 9 10 *1 Available when used in the common bus regeneration mode When connecting an optional brake resistor (FR-ABR) or a brake unit (FR-BU2, FR-BU, BU), remove the jumpers across terminals PR and PX. For the details, refer to page 98 . 55 2. INSTALLATION AND WIRING 2.5 Main circuit terminals Terminal symbol Terminal name Terminal function description Refer to page R/L1, S/L2, T/L3 AC power input Connect these terminals to the commercial power supply.
Do not connect anything to these terminals when using the high power factor converter (FR-HC2), multifunction regeneration converter (FR- XC)*1, or power regeneration common converter (FR-CV). — U, V, W Inverter output Connect these terminals to a three-phase squirrel cage motor or a PM motor. — R1/L11, S1/L21 Power supply for the control circuit Connected to the AC power supply terminals R/L1 and S/L2.
To retain the fault display and fault output, or to use the high power factor converter (FR-HC2), multifunction regeneration converter (FR-XC)*1, or power regeneration common converter (FR-CV), remove the jumpers across terminals R/L1 and R1/L11 and across S/L2 and S1/ L21, and supply external power to these terminals. The power capacity necessary when separate power is supplied from R1/L11 and S1/L21 differs according to the inverter capacity. FR-A820-00630(11K) or lower, FR-A840-00380(15K) or lower: 60 VA FR-A820-00770(15K) or higher, FR-A840-00470(18.5K) or higher:
80 VA 78 P/+, PR Brake resistor connection for FR- A820-00630(11K) or lower, or FR-A840-00380(15K) or lower Connect an optional brake resistor (FR-ABR) across terminals P/+ and PR. Remove the jumper across terminals PR and PX for the inverter capacity that has terminal PX. Connecting a brake resistor increases the regenerative braking capability. 98 P3, PR Brake resistor connection for FR- A820-00770(15K) to 01250(22K), or FR-A840-00470(18.5K) to 01800(55K) Connect an optional brake resistor across terminals P3 and PR. Connecting a brake resistor increases the regenerative braking capability.
P/+, N/- Brake unit connection Connect the brake unit (FR-BU2, FR-BU, BU), power regeneration common converter (FR-CV), power regeneration converter (MT-RC), high power factor converter (FR-HC2), multifunction regeneration converter (FR-XC), or DC power supply (under DC feeding mode). 102 P/+, P1 DC reactor connection for FR- A820-03160(55K) or lower, or FR-A840-01800(55K) or lower Remove the jumper across terminals P/+ and P1, and connect a DC reactor. When a DC reactor is not connected, the jumper across terminals P/+ and P1 should not be removed. When using a motor with a capacity of 75 kW or higher, always connect a DC reactor, which is available as an option.
110 DC reactor connection for FR- A820-03800(75K) or higher, or FR-A840-02160(75K) or higher Always connect a DC reactor, which is available as an option. PR, PX Built-in brake circuit connection When the jumper is connected across terminals PX and PR (initial status), the built-in brake circuit is valid. The built-in brake circuit is equipped in the FR-A820-00490(7.5K) or lower and FR-A840-00250(7.5K) or lower. — Earth (ground) For earthing (grounding) the inverter chassis. Be sure to earth (ground) the inverter. 68 NOTE