25B-A8P0N104 — 525 Series AC Drive, 120V Single-Phase, 1.1 kW, EtherNet/IP

The 25B-A8P0N104 is a 1.1 kW / 1.5 HP variable frequency drive from the 525 series, configured for 100–120V AC single-phase input. Output current is 8.0A to a three-phase motor. Like all drives in the 525 platform, it includes dual-port EtherNet/IP as a standard onboard feature — not an add-on card — along with a secondary option port for additional communication or encoder modules.

The 525 series sits above the V-mini and the basic 40 series in terms of features. It supports sensorless vector control in addition to V/Hz, carries Safe Torque Off inputs as standard, and the embedded EtherNet/IP port enables full drive control and monitoring from a CompactLogix or similar controller without any additional hardware. For machine builders specifying drives that need to be part of a networked EtherNet/IP architecture, the 525 covers that natively from the base unit.

Specifications

Parameter	Value
Part Number	25B-A8P0N104
Series	525 Series
Power Rating	1.1 kW / 1.5 HP
Input Voltage	100–120V AC, Single-Phase
Output Current	8.0 A
Output Frequency Range	0–500 Hz
Control Modes	V/Hz, Sensorless Vector (SVC)
Embedded Communication	EtherNet/IP (dual-port, built-in)
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
Safe Torque Off (STO)	Category 3 / PLd (standard, hardwired)
Enclosure	IP20 / Open Type
Operating Temperature	−10°C to 50°C (derate above 40°C)
Approvals	UL, CE, RCM

EtherNet/IP Integration — More Than Just Remote Start/Stop

The dual-port EtherNet/IP on the 525 is not just a remote start/stop interface. With a cyclic I/O connection to a CompactLogix controller, the full range of drive control and monitoring data is available as controller tags, updated every scan cycle:

Output frequency, output current, DC bus voltage, and drive temperature are readable status values that can be used in the controller program for monitoring, interlocking, or display on an HMI.
Speed reference, direction, acceleration time override, and fault reset are all writable from the controller — the program drives the drive dynamically rather than relying on fixed pre-programmed speeds.
The drive's Add-On Profile (AOP) in Studio 5000 provides named tags for all these parameters, making the program self-documenting without requiring parameter index numbers.

The dual-port topology supports both linear and Device Level Ring (DLR) network architectures. In DLR mode, the drive participates directly in the ring as a node, providing network redundancy without an external switch at each drive location. For machine designs with many drives in a line, this can significantly reduce wiring and hardware compared to star topology.

Motor Control Mode Selection

The choice between V/Hz and sensorless vector (SVC) comes down to what the load requires at low speeds and under variable loading conditions.

V/Hz maintains a fixed ratio of output voltage to output frequency. It's predictable, stable, and adequate for centrifugal loads — pumps, fans, blowers — where torque demand scales with the square of speed. The motor doesn't need strong torque at near-zero speed; it just needs to run smoothly at whatever speed is commanded.

SVC actively estimates motor flux and adjusts the output to maintain the commanded torque regardless of speed. This is more appropriate for loads that need consistent torque at low speeds: conveyors starting under full load, mixers handling thick product, tension-control applications where the speed varies but the torque must stay constant. SVC mode requires an autotune with accurate motor nameplate data entered first — running SVC without autotune gives unpredictable results.

FAQ

Q: The drive has a 120V single-phase input — what's the output voltage to the motor?

The drive outputs a three-phase PWM voltage up to the input voltage level. On a 120V input, the output voltage reaches approximately 120V three-phase (line-to-line). Match this to the motor's nameplate voltage — the motor must be rated for operation at this output voltage level.

Q: How is the IP address assigned for EtherNet/IP?

The default method is BOOTP. Connect to a network with a BOOTP server to receive an address automatically, or use the drive's HIM to set a static IP address manually. For production installations, static IP is recommended to prevent address reassignment after a power cycle on a network without a permanent BOOTP server.

Q: Can the 525 series drive control two motors simultaneously?

No. One drive controls one motor. Driving two motors from a single drive output is technically possible in some configurations but voids motor overload protection and creates unbalanced load sharing between the motors. One drive per motor is the correct approach.

Q: Does the STO function require a safety PLC or will a standard safety relay work?

A standard safety relay with Category 3 or Category 4 rated force-guided contacts is sufficient to drive the STO inputs and achieve the Category 3 / PLd rating. A safety PLC is not required for the STO function itself — it's only needed if the application requires more complex safety logic beyond simple E-stop.

Q: What is the purpose of the secondary option port on the 525 series?

The option port accepts plug-in peripheral modules that add functionality not available on the base drive: an encoder feedback card for closed-loop vector control, an additional communication card for a second network protocol, or an expanded I/O card. It's a way to extend the drive's capabilities for specific application requirements without changing to a different drive platform.

25B-A8P0N104 New Sealed AC Drive 1.5kW 2Hp 25BA8P0N104