20-750-20COMM | Allen-Bradley PowerFlex 750-Series 20-COMM-* Adapter Card
20-750-20COMM | Allen-Bradley PowerFlex 750-Series 20-COMM-* Adapter Card
20-750-20COMM | Allen-Bradley PowerFlex 750-Series 20-COMM-* Adapter Card
    20-750-20COMM | Allen-Bradley PowerFlex 750-Series 20-COMM-* Adapter Card
20-750-20COMM | Allen-Bradley PowerFlex 750-Series 20-COMM-* Adapter Card

20-750-20COMM | Allen-Bradley PowerFlex 750-Series 20-COMM-* Adapter Card

Part #: 20-750-20COMM Manufactured by: Allen-Bradley
$184.00
$184.00
2 in Stock
Condition: New-Surplus Original Box
Shipping calculated at checkout.
Product Overview
The 20-750-20COMM Communication Carrier Card by Allen-Bradley is used with the Allen-Bradley Powerflex 755 series. It is c...  Read more
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Product Description P/N: 20-750-20COMM

Description / Specifications

Description 

The 20-750-20COMM is an Allen-Bradley carrier card. This card enables an obsolete 20-COMM communication adapter, of any supported protocol, to be installed to a PowerFlex 750 Adjustable Frequency AC drive. This carrier card is compatible with 20-COMM-B, 20-COMM-C, 20-COMM-D, 20-COMM-E, 20-COMM-H, 20-COMM-K, 20-COMM-L, 20-COMM-M, 20-COMM-P, 20-COMM-Q, 20-COMM-R, and 20-COMM-S. This carries card may be installed with PowerFlex 750 Frame A2 and higher.

 

Technical Specifications 

 

Brand Allen-Bradley
Manufacturer Rockwell Automation
Part Number 20-750-20COMM
Compatible Drives PowerFlex 750
Mounting Torque 0.45…0.67 N-m (4.0…6.0 lb-in) 3 Places
Asian Languages Supported (Chinese, Korean, Japanese)
Add-on Profiles Supported
Communication Protocol Depending on the adapter used
Mode of operation RTU, P1, N2
Compatible communication adapter 20-750-20COMM supports 20-COMM-C, 20-COMM-D, 20- COMM-E, 20-COMM-H, 20-COMM-K, 20-COMM-L, 20- COMM-M, 20-COMM-P, 20-COMM-Q, 20-COMM-R, and 20- COMM-S
Communication Port Port 6 (recommended); Port 4 and 5
Drive Size Frame 2 or higher drives
Description Carrier card
Product Type Communication Carrier Card
Used with Powerflex 755
Powerflex Frame Size Compatibility 2 min.

  

 

Information About 20-750-20COMM

The Allen-Bradley 20-750-20COMM is a carrier card that is manufactured by Allen-Bradley. This card is used to enable support with legacy and obsolete communication adapters for use with the PowerFlex 750 class drives, specifically, PowerFlex 753 and PowerFlex 755. This carrier card may only be used with PowerFlex 750 Frame 2 and larger drives.

The 20-750-20COMM supports a variety of communication adapters such as 20-COMM-C ControlNet (Coax) communication adapter Versions v3.001; , 20-COMM-D DeviceNet adapter; 20-COMM-E Ethernet I/P adapter; 20-COMM-H RS-485 HVAC adapter v2.009; 20-COMM-K Version v1.001 CANOpen adapter; 20-COMM-L version v1.007 LONWORKS adapter; 20-COMM-M v2.001 MODBUS TCP adapter; 20-COMM-P version v1.006 ControlNet (Fiber) adapter; 20-COMM-Q v3.001 Profubus DP adapter; 20-COMM-R Remote I/O adapter and 20-COMM-S RS485 DF1 communication adapter.

Specific Asian language support includes Chinese, Japanese and Korean languages.

The carries card, due to its larger size, is recommended to be installed in Port 6. It may also be installed in Port 4 or 5, however, the adjacent ports will become unavailable as this carrier card will cover the slot. With Port 6, this can be avoided. Additionally, installation to Port 6 prevent communication interference.

PowerFlex 753 drives provide control for applications requiring a maximum of 400 Horsepower (270 kilowatts). PowerFlex 755 drives provide control for applications requiring a maximum of 2000 Horsepower (1500 kilowatts). For frame 2 and larger drives, Allen-Bradley recommends that the 20-750-20COMM card be installed in Port 6 because the use of Port 4 or 5 will make the adjacent port inaccessible to other option modules and it can also interfere with network cable connections. Legacy communication modules which require the 20-750-20COMM card to be installed in a PowerFlex 750 series drive include the 20-COMM-C module which supports ControlNet over coaxial cable, the 20-COMM-D module to enable DeviceNet communication, the 20-COMM-E module to enable Ethernet communication, the 20-COMM-H module which supports HVAC applications (only the Modbus RTU can be used), 2the 0-COMM-K module to enable CANopen communication, the 20-COMM-L module which supports LonWorks communication, the 20-COMM-M module that enables Modbus/TCP communication, the 20-COMM-P module which supports Profibus DP communication, the 20-COMM-Q module to enable ControlNet communication over fiber, the 20-COMM-R module for Remote I/O communication, and the 20-COMM-S module for RS-485 DF1 communication. The installation of a PowerFlex 750 drive which contains the 20-750-20COMM card should be avoided in hazardous environments which contain volatile or corrosive gas, vapors, and dust. Unused 20-750-20COMM card modules should be kept in storage at a temperature range of -40 to 158 degrees Fahrenheit.



Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

Frequently Asked Questions about 20-750-20COMM
Question: What is the 20-750-20COMM carrier card used for?
Date Update:10/06/2025
Answer:

The 20-750-20COMM is a communication carrier card manufactured by Allen-Bradley. It allows older 20-COMM communication adapters to be installed in PowerFlex 750 class drives (PowerFlex 753 and 755). This extends the usability of legacy communication modules by integrating them into modern drive systems. The carrier card is required for connecting legacy 20-COMM modules, ensuring continued support for older protocols.

Question: What is the recommended installation port for the 20-750-20COMM?
Date Update:10/06/2025
Answer:

While the 20-750-20COMM can be installed in Ports 4, 5, or 6, Port 6 is recommended.

Reason:

  • Installing the carrier card in Port 4 or 5 blocks adjacent ports, limiting expandability and network cable access.
  • Port 6 offers the best accessibility and reduces the risk of interference with other modules.

This ensures optimal communication performance and system flexibility.

Question: Can the 20-750-20COMM be used in hazardous environments?
Date Update:10/06/2025
Answer:

No, it is not recommended to install the 20-750-20COMM in hazardous environments where there may be volatile or corrosive gases, vapors, or dust. Exposure to such environments could damage the module or affect its performance. For applications in such environments, users should consult Rockwell Automation’s safety documentation or choose appropriately certified modules.

Question: What drives are compatible with the 20-750-20COMM?
Date Update:10/06/2025
Answer:

The carrier card is compatible with PowerFlex 750 series drives, including:

  • PowerFlex 753: Supports applications up to 400 HP (270 kW).
  • PowerFlex 755: Supports applications up to 2000 HP (1500 kW).
  • Frame Requirement: Must be installed in Frame 2 or larger drives.

This compatibility ensures that legacy communication protocols can be integrated into modern high-power systems.

Question: How does the 20-750-20COMM enhance communication options for PowerFlex 750 drives?
Date Update:10/06/2025
Answer:

The carrier card bridges the gap between legacy communication adapters and modern drive systems. By enabling the use of older 20-COMM modules with PowerFlex 750 drives, it allows users to maintain existing network configurations without needing to replace communication infrastructure. This makes it easier to upgrade or expand systems while preserving investment in existing equipment.

IQElectro is not an authorized distributor.
QElectro LLC (IQElectro) is NOT an Authorized Distributor or in any way affiliated with Rockwell Automation, Siemens, or any other Manufacturers. IQElectro is NOT an Authorized Dealer of this product. The product may be of older version, date codes, or design than that available from authorized dealers. As IQElectro is not an authorized dealer of this product, the Original Manufacturer's Warranty and Support DO NOT apply. IQElectro sells SURPLUS only and DOES NOT SELL SOFTWARE or FIRMWARE licenses For more detailed information, please refer to the full version of our disclaimer policy Disclaimer Policy.
Description / Specifications

Description 

The 20-750-20COMM is an Allen-Bradley carrier card. This card enables an obsolete 20-COMM communication adapter, of any supported protocol, to be installed to a PowerFlex 750 Adjustable Frequency AC drive. This carrier card is compatible with 20-COMM-B, 20-COMM-C, 20-COMM-D, 20-COMM-E, 20-COMM-H, 20-COMM-K, 20-COMM-L, 20-COMM-M, 20-COMM-P, 20-COMM-Q, 20-COMM-R, and 20-COMM-S. This carries card may be installed with PowerFlex 750 Frame A2 and higher.

 

Technical Specifications 

 

Brand Allen-Bradley
Manufacturer Rockwell Automation
Part Number 20-750-20COMM
Compatible Drives PowerFlex 750
Mounting Torque 0.45…0.67 N-m (4.0…6.0 lb-in) 3 Places
Asian Languages Supported (Chinese, Korean, Japanese)
Add-on Profiles Supported
Communication Protocol Depending on the adapter used
Mode of operation RTU, P1, N2
Compatible communication adapter 20-750-20COMM supports 20-COMM-C, 20-COMM-D, 20- COMM-E, 20-COMM-H, 20-COMM-K, 20-COMM-L, 20- COMM-M, 20-COMM-P, 20-COMM-Q, 20-COMM-R, and 20- COMM-S
Communication Port Port 6 (recommended); Port 4 and 5
Drive Size Frame 2 or higher drives
Description Carrier card
Product Type Communication Carrier Card
Used with Powerflex 755
Powerflex Frame Size Compatibility 2 min.

  

 

Information About 20-750-20COMM

The Allen-Bradley 20-750-20COMM is a carrier card that is manufactured by Allen-Bradley. This card is used to enable support with legacy and obsolete communication adapters for use with the PowerFlex 750 class drives, specifically, PowerFlex 753 and PowerFlex 755. This carrier card may only be used with PowerFlex 750 Frame 2 and larger drives.

The 20-750-20COMM supports a variety of communication adapters such as 20-COMM-C ControlNet (Coax) communication adapter Versions v3.001; , 20-COMM-D DeviceNet adapter; 20-COMM-E Ethernet I/P adapter; 20-COMM-H RS-485 HVAC adapter v2.009; 20-COMM-K Version v1.001 CANOpen adapter; 20-COMM-L version v1.007 LONWORKS adapter; 20-COMM-M v2.001 MODBUS TCP adapter; 20-COMM-P version v1.006 ControlNet (Fiber) adapter; 20-COMM-Q v3.001 Profubus DP adapter; 20-COMM-R Remote I/O adapter and 20-COMM-S RS485 DF1 communication adapter.

Specific Asian language support includes Chinese, Japanese and Korean languages.

The carries card, due to its larger size, is recommended to be installed in Port 6. It may also be installed in Port 4 or 5, however, the adjacent ports will become unavailable as this carrier card will cover the slot. With Port 6, this can be avoided. Additionally, installation to Port 6 prevent communication interference.

PowerFlex 753 drives provide control for applications requiring a maximum of 400 Horsepower (270 kilowatts). PowerFlex 755 drives provide control for applications requiring a maximum of 2000 Horsepower (1500 kilowatts). For frame 2 and larger drives, Allen-Bradley recommends that the 20-750-20COMM card be installed in Port 6 because the use of Port 4 or 5 will make the adjacent port inaccessible to other option modules and it can also interfere with network cable connections. Legacy communication modules which require the 20-750-20COMM card to be installed in a PowerFlex 750 series drive include the 20-COMM-C module which supports ControlNet over coaxial cable, the 20-COMM-D module to enable DeviceNet communication, the 20-COMM-E module to enable Ethernet communication, the 20-COMM-H module which supports HVAC applications (only the Modbus RTU can be used), 2the 0-COMM-K module to enable CANopen communication, the 20-COMM-L module which supports LonWorks communication, the 20-COMM-M module that enables Modbus/TCP communication, the 20-COMM-P module which supports Profibus DP communication, the 20-COMM-Q module to enable ControlNet communication over fiber, the 20-COMM-R module for Remote I/O communication, and the 20-COMM-S module for RS-485 DF1 communication. The installation of a PowerFlex 750 drive which contains the 20-750-20COMM card should be avoided in hazardous environments which contain volatile or corrosive gas, vapors, and dust. Unused 20-750-20COMM card modules should be kept in storage at a temperature range of -40 to 158 degrees Fahrenheit.



Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

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