The Fuji FRN125F1S-2DY is a FRENIC-ECO Pump (F1-DY) series variable frequency drive rated for 125 HP on a 3-phase 230 VAC supply. This is the pump-specific variant of the FRENIC-ECO line, meaning the firmware and default parameters are tuned for centrifugal pump and fan loads — quadratic torque curve, built-in PID for pressure or level control, and sleep/wake functions to avoid dry-running.
The 125 HP rating at 230 V three-phase is the motor output capacity under normal constant-torque conditions. On a pump curve, the drive can typically handle a slightly larger motor at reduced load, but the nameplate limit governs the branch circuit protection and cable sizing. The pump-specific firmware (F1-DY) includes multi-pump cascade control, so if your application involves lead/lag sequencing of up to four pumps, this variant saves an external PLC for that logic. The 230 V class means it connects to a 208–240 V three-phase supply; a 480 V installation would need the corresponding -4DY variant.
Integration notes
The FRENIC-ECO frame size for 125 HP at 230 V is a larger cabinet-mount unit — expect bolted lug power terminals rather than a plug-in connector. The control terminal block accepts 0.5–2.5 mm² wire for analog inputs and digital I/O. The drive supports Modbus RTU over RS-485 as standard; an optional PROFIBUS-DP or DeviceNet card fits the option slot. For pump applications, wire the 4–20 mA feedback from the pressure transducer to terminal 12 (AI1) and configure the PID setpoint via the keypad or serial command.