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131B3552 Danfoss

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Internal Product Review

The 131B3552 is a Danfoss FCD 300 micro drive with 5 digital inputs and 1 analog voltage input. High start torque of 180% for 0.5 sec. and starting torque of 160% in 1 min. support confident acceleration in demanding duty cycles. Reliable signal handling and strong startup performance make this unit an excellent compact drive solution.

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Product Description:

The 131B3552 decentralized variable-frequency drive is assembled by Danfoss within the FCD 300 Micro Drives series. It converts fixed-frequency three-phase power into a controlled output that regulates induction motor speed for compact conveyors, mixers, or pump skids in industrial automation. Mounting the drive directly on the machine frame keeps cable runs short. The unit accepts fieldbus or hardwired references to control acceleration, deceleration, and steady-state speed in production environments where panel space is limited.

A 10.5 V ±0.5 V auxiliary supply powers potentiometers or sensors, and the single analog voltage channel is digitized at 10-bit resolution, providing precise setpoint control. One analog current input, five digital inputs, and two pulse inputs support mixed-signal commands. The transistorized digital output can drive indicators or interposing relays with currents up to 25 mA, while a frequency output reaches 10 kHz for tachometer simulation or counter feedback. High-inertia loads can be released from standstill because the inverter supplies 180% of rated torque for 0.5 seconds. Push-pull references are accepted at frequencies up to 110 kHz, and the drive maintains operation during permitted levels of supply imbalance.

The drive operates without derating at installation altitudes up to 1000 m. Phase voltage variation must remain within ±2.0% to prevent imbalance faults and unstable motor operation. The power section has a fuse short-circuit current rating of 100,000 A, while the upstream circuit breaker rating is limited to 10,000 A for proper coordination. In constant-torque duty, the drive can sustain 160% of rated torque for one minute, providing temporary overload capacity for augers or screw feeders that encounter brief jams. The ambient temperature may reach 40 °C during operation. Separate analog, digital, and pulse inputs allow the drive to receive commands from several types of industrial control devices without requiring an external signal converter.

10 V Output Voltage
10.5 V ±0.5 V
Ambient Temperature Max
40 °C
Analog Current Inputs
1
Analog Input Resolution
10 bit
Analog Voltage Inputs
1
Digital Inputs
5
Digital Output Max Current
25 mA
Frequency Output Max
10 kHz
High Start Torque
180% for 0.5 sec.
Max Altitude
1000 m
Max Breaker Sccr
10,000 A
Max Fuse Sccr
100,000 A
Max Supply Imbalance
±2.0%
Pulse Inputs
2
Push-pull Pulse Max
110 kHz
Starting Torque (ct)
160% in 1 min.

Frequently Asked Questions about 131B3552:

Q: How many digital inputs are provided on the Danfoss 131B3552 drive?

A: The 131B3552 FCD 300 Micro Drive includes 5 digital inputs for control and automation tasks.

Q: What options are available for analog inputs on the 131B3552 drive?

A: This drive supports one analog voltage input and one analog current input for varied signal integration.

Q: What is the maximum frequency output available on the 131B3552?

A: The Danfoss 131B3552 offers a maximum frequency output of 10 kHz.

Q: What is the highest ambient temperature at which the 131B3552 can operate?

A: The maximum ambient operating temperature for this drive is 40 °C.

Q: How much high start torque is offered by the Danfoss 131B3552 drive?

A: The high start torque of this drive reaches 180% for up to 0.5 seconds.

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