Danfoss 130B1125 MCB 101 General Purpose I/O Module – FC102/202/302

What Is the Danfoss 130B1125 MCB 101?

The Danfoss 130B1125 is a VLT General Purpose I/O MCB 101 expansion module designed to extend the control input and output capabilities of compatible Danfoss frequency converters.

It is installed in the B option slot (Slot B) of the drive and provides additional digital and analog I/O connections for industrial automation and control applications.

The MCB 101 supports selected Danfoss VLT FC102, FC202 and FC302 drive configurations.

This unit is offered as tested stock for industrial automation maintenance and replacement applications.

Key Specifications

Specification	Details
Part Number	130B1125
Manufacturer	Danfoss
Product Type	General Purpose I/O Expansion Module
Option Module	VLT MCB 101
Drive Series	VLT FC102 / FC202 / FC302
Installation Position	B Option Slot (Slot B)
Digital Inputs	3 × 0–24V
Analog Inputs	2 × 0–10V
Digital Outputs	2 × NPN / PNP Push-Pull
Analog Output	1 × 0/4–20mA
Input Resolution	10-bit + sign
Connection Type	Spring-Loaded Terminals
Version	Standard / Uncoated
Coated Version	130B1212
Condition	Tested Stock
Application	Industrial Automation I/O Expansion

Applications and Compatibility

The Danfoss 130B1125 MCB 101 is designed to expand the digital and analog I/O capabilities of compatible VLT frequency converters.

Danfoss documentation lists MCB 101 as a B-slot functional extension for the following drive series:

• FC102 – VLT HVAC Drive.
• FC202 – VLT AQUA Drive.
• FC302 – VLT Automation Drive.

The official Danfoss options portfolio also lists MCB 101 for FC301 and FC103 configurations.

Important Compatibility Checks:

Before ordering, verify:

• Confirm that the original option module carries the part number 130B1125.
• Check that the drive supports the MCB 101 B-slot option.
• Verify the complete FC102 / FC202 / FC302 drive model.
• Check the available option slot and installation space.
• Compare the module identification label and connector layout.
• Confirm whether the standard uncoated or coated version is required.

Do not assume that every VLT drive configuration has an available or compatible B option slot.

MCB 101 Input and Output Functions

The MCB 101 provides additional control connections for industrial automation applications.

Its main I/O functions include:

• 3 Digital Inputs: 0–24V control signals.
• 2 Analog Inputs: 0–10V signal range.
• 2 Digital Outputs: NPN / PNP push-pull configuration.
• 1 Analog Output: 0/4–20mA signal.
• Input Resolution: 10-bit plus sign.
• Connection: Spring-loaded terminals.

The module allows the drive to interface with additional external sensors, switches, controllers and automation equipment.

How to Identify the Correct Replacement Module

When replacing an MCB 101 option module, compare the original module with the replacement.

Check the following details:

• Ordering number printed on the module.
• MCB 101 identification marking.
• Standard or coated version.
• Terminal layout and connector configuration.
• B-slot installation compatibility.
• Complete Danfoss drive model.

If you are unsure about compatibility, send us a clear photo of the existing module and the drive identification label before ordering.

When Should the MCB 101 Be Replaced?

An MCB 101 module may require inspection or replacement when the drive experiences abnormal I/O operation.

Common situations include:

• Digital input signals are not detected correctly.
• Analog input readings are abnormal.
• Digital output signals do not operate as expected.
• Analog output signals are missing or unstable.
• Visible damage or overheating is found on the module.

Before replacing the module, inspect external wiring, terminal connections, control signals and drive configuration parameters.

An I/O fault does not automatically mean the MCB 101 module is defective.

Condition and Testing

This product is offered as tested stock for Danfoss VLT frequency converter maintenance and replacement.

Please contact us for available inspection and functional testing details, actual product photos and current stock availability.

Confirm the module condition and testing scope before purchase.

Frequently Asked Questions

What is the Danfoss 130B1125 used for?

The 130B1125 is a General Purpose I/O MCB 101 expansion module used to add digital and analog control inputs and outputs to compatible Danfoss VLT drives.

Is 130B1125 compatible with FC102, FC202 and FC302?

Yes. Danfoss documentation lists MCB 101 as a supported B-slot option for FC102, FC202 and FC302 configurations. Confirm that the specific drive has a compatible B option slot.

How many I/O connections does MCB 101 provide?

It provides 3 digital inputs, 2 analog inputs, 2 digital outputs and 1 analog output.

What is the difference between 130B1125 and 130B1212?

130B1125 is the standard uncoated version. 130B1212 is the coated version designed for more demanding environmental conditions, including Class 3C3 applications.

Does MCB 101 have a specific 37–45kW rating?

No. MCB 101 is an I/O expansion option, not a power-rated inverter component. Its compatibility depends on the supported drive series and B-slot configuration.

Is this module tested?

This listing is for tested stock. Please request available inspection and functional testing details before ordering.

Need Help Confirming Compatibility?

Looking for a replacement Danfoss 130B1125 MCB 101 General Purpose I/O module?

Send us:

• A clear photo of the existing MCB 101 module.
• A close-up photo of the 130B1125 identification label.
• The complete Danfoss FC102 / FC202 / FC302 drive model.
• A photo of the B-slot installation position.
• Your required quantity.

Contact us for product identification, compatibility assistance and quotation.