25B-B2P5N104 — 525 Series AC Drive, 240V Single-Phase, 0.4 kW, EtherNet/IP

The 25B-B2P5N104 is a 0.4 kW / 0.5 HP variable frequency drive from the 525 series, configured for 200–240V AC single-phase input with 2.5A output current to a three-phase motor. It includes the full 525 platform feature set as standard: embedded dual-port EtherNet/IP, Safe Torque Off inputs, sensorless vector control, and a peripheral option port for expansion modules. The IP20 open-type housing is designed for panel mounting in a clean, ventilated enclosure.

At 0.4 kW / 240V single-phase, this drive targets the lowest end of the power spectrum where network-capable drives make sense — light conveyor sections, small pump drives, agitator motors on lab equipment, and fans on compact machines that need variable speed and EtherNet/IP visibility. Having both ports and STO built in at this power level means no communication card is needed and no additional safety hardware is required for basic STO functionality.

Specifications

Parameter	Value
Part Number	25B-B2P5N104
Series	525 Series
Power Rating	0.4 kW / 0.5 HP
Input Voltage	200–240V AC, Single-Phase
Output Current	2.5 A (three-phase output)
Output Frequency Range	0–500 Hz
Control Modes	V/Hz, Sensorless Vector (SVC)
Embedded Communication	EtherNet/IP dual-port (built-in)
DLR Support	Yes
Option Port	1 × peripheral expansion slot
Digital Inputs	6 × 24V DC (programmable)
Analog Inputs	2 × 0–10V / 0–20 mA (selectable)
Relay Output	1 × Form C (NO + NC)
Safe Torque Off (STO)	Category 3 / PLd (hardwired, standard)
Enclosure	IP20 / Open Type
Operating Temperature	−10°C to 50°C (derate above 40°C)
Approvals	UL, CE, RCM

240V Single-Phase Input — What to Know

The drive converts single-phase 240V AC to a DC bus internally, then inverts to three-phase AC output. The motor connected must be a three-phase induction motor — the output is always three-phase PWM regardless of input. The motor's nameplate voltage rating must be compatible with the drive's output voltage (up to the input voltage level).

Input current is asymmetric and higher than you'd expect from the output alone. At 0.4 kW and 240V single-phase, the input current under full load is typically 3–4A — the DC bus capacitor charging current creates brief current spikes on each half-cycle. The input branch circuit should be a dedicated 10–15A circuit. A shared circuit with other loads may trip on drive startup from the DC bus inrush current pulse, even if the steady-state running current would be within the circuit's capacity.

Installation Checklist

Input circuit: dedicate a 10–15A branch circuit to this drive. Do not share with other loads that could cause the breaker to trip on drive startup.
Motor cable length: keep under 30 m. Beyond this, reflected wave voltage at the motor terminals can stress standard motor insulation. Add a dV/dt output reactor for longer runs.
STO wiring: wire the STO terminals (S1, S2, +24V) to a safety relay or safety controller output before commissioning. Do not jumper them — this disables the safety function. STO is not optional for CE-marked machines requiring Category 3 / PLd stop functions.
IP address: default is BOOTP. Set a static IP using the HIM keypad before connecting to the production network. Confirm subnet mask and gateway match the network's addressing scheme.
Derating: if panel ambient temperature will exceed 40°C, apply the current derating curve. The 2.5A output current reduces by approximately 1–2% per degree above 40°C.

FAQ

Q: Can this drive run on 120V single-phase input?

No. The 25B-B series is rated for 200–240V single-phase. For 100–120V single-phase input, the 25A-A or 25B-A variants are required.

Q: Does SVC mode require any special setup?

Yes — run a static autotune first. Enter accurate motor nameplate data (rated voltage, current, frequency, speed), then run the autotune routine from the drive's parameter menu. Autotune measures the motor's electrical characteristics and calculates the control parameters. SVC without autotune produces unpredictable low-speed torque behavior.

Q: Can two drives be connected in a DLR ring from the same controller?

Yes, and more than two. DLR supports multiple nodes on the ring. The ring supervisor — typically the PLC's EtherNet/IP module, if it supports ring supervision — manages the ring topology. Drives participate as ring nodes regardless of how many are in the ring.

Q: What does the Form C relay output provide that Form A doesn't?

Form C provides both a normally open and a normally closed contact from the same relay. This allows a single output to simultaneously close one circuit and open another — useful for run confirmation with fail-safe logic where both a "running" signal and a "not running" signal are needed without two separate outputs.

25B-B2P5N104 New 25BB2P5N104 AC Driver 0.4kW (0.5Hp) Servo Driver