Allen-Bradley 20-HIM-H10

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SKU: 20-HIM-H10 Category: Drive Brand: Allen-Bradley

The Allen-Bradley 20-HIM-H10 is a Human Interface Module (HIM) designed for use with the PowerFlex 750-Series AC drives, manufactured by Allen-Bradley (Rockwell Automation). It serves as a remote or panel-mounted operator interface, allowing users to program, monitor, and control PowerFlex 750-Series drives from a convenient location. The 20-HIM-H10 is a remote LCD HIM that connects to the drive via a peripheral cable, enabling installation away from the drive enclosure.

The 20-HIM-H10 features a backlit LCD display for clear parameter readout and navigation, along with a full numeric keypad and dedicated function keys for intuitive drive configuration. It supports parameter upload and download functionality, allowing drive configurations to be copied between units using the onboard memory. The module communicates with the drive over the peripheral port interface native to the PowerFlex 750-Series platform. It is housed in a robust enclosure rated for industrial environments and is designed for panel door mounting with a NEMA/IP-rated bezel.

This HIM module is widely used in manufacturing, material handling, water and wastewater treatment, HVAC, and process industries wherever PowerFlex 750-Series drives are deployed. Its remote mounting capability makes it particularly suitable for applications where the drive is installed inside a locked enclosure or in a location that is difficult to access during normal operation. The ability to store and transfer parameter sets also makes it valuable during commissioning and maintenance activities across multiple drive installations.

Technical Specifications

Series/Product Family	PowerFlex 750-Series HIM
Display Type	Backlit LCD
Display Lines	4 lines
Display Characters per Line	20 characters
Input/Operating Voltage	Powered via peripheral port (no separate supply required)
Communication Interface	Peripheral port (dedicated HIM port on PowerFlex 750-Series)
Mounting	Remote panel door mount
IP/Protection Rating	IP66 (panel-mounted bezel)
Operating Temperature	0 to 40 degrees C
Storage Temperature	-40 to 85 degrees C
Relative Humidity	5 to 95% non-condensing
Memory	Onboard parameter storage for drive configuration upload/download
Cable Length (max)	3 m (peripheral cable)
Certifications	UL, CE
Compatible Drives	PowerFlex 750-Series (755, 753)

Common Fault Codes

Fault Code 81: HIM communication loss. The drive has lost communication with the connected HIM module.
Check the peripheral cable connection between the HIM and the drive. Reseat the cable at both ends. Replace the cable or the HIM if the fault persists.
Fault Code 48: Parameters defaulted. Drive parameters have been reset to factory defaults, often triggered during HIM-initiated parameter operations.
Reload the saved parameter set using the HIM upload/download function or reprogram the drive parameters manually.
Fault Code 100: Parameter checksum error. The stored parameter data in the drive or HIM memory has failed a checksum validation.
Perform a parameter download from a known-good backup stored on the HIM or reprogram parameters from the application documentation.
HIM Display: No Power: The HIM display does not illuminate, indicating no power is being supplied via the peripheral port.
Verify the peripheral port on the drive is functional. Test with a known-good HIM. Check for drive-level faults preventing peripheral port power output.
HIM Display: Comm Error: The HIM displays a communication error message, indicating it cannot establish or maintain communication with the drive.
Inspect the peripheral cable for damage or loose connections. Ensure the HIM is fully seated. Try a replacement cable. Verify drive firmware compatibility.
Fault Code 122: HIM removed while drive was in HIM control mode. The drive faulted because the control source was the HIM and it was disconnected.
Reconnect the HIM and clear the fault. If remote HIM removal is expected during operation, configure the drive to transfer control to another source upon HIM loss.
Upload/Download Fault: Parameter upload or download operation failed or was interrupted during a HIM-to-drive or drive-to-HIM transfer.
Retry the upload or download operation. Ensure the drive is not running during the transfer. Check cable integrity and that the HIM memory is not corrupted.

Frequently Asked Questions

Which drives is the 20-HIM-H10 compatible with?

The 20-HIM-H10 is designed for use with Allen-Bradley PowerFlex 750-Series drives, including the PowerFlex 753 and PowerFlex 755. It connects via the dedicated peripheral HIM port on these drives.

Can the 20-HIM-H10 store drive parameters for transfer to another drive?

Yes, the 20-HIM-H10 has onboard memory that allows users to upload parameters from one drive and download them to another compatible PowerFlex 750-Series drive, which is useful for commissioning and drive replacement.

Does the 20-HIM-H10 require a separate power supply?

No, the 20-HIM-H10 is powered directly through the peripheral port cable connected to the PowerFlex 750-Series drive. No separate 24V DC supply is required.

What is the maximum cable length for remote mounting the 20-HIM-H10?

The 20-HIM-H10 supports remote mounting using a peripheral cable with a maximum recommended length of 3 meters.

Is the 20-HIM-H10 rated for panel door mounting in industrial environments?

Yes, the 20-HIM-H10 is designed for panel door mounting and the bezel carries an IP66 protection rating, making it suitable for industrial environments where dust and water ingress protection is required.

Troubleshooting

HIM display remains blank after connecting to the drive

Check whether the drive itself is powered and operational. Verify the peripheral cable is fully seated at both the HIM connector and the drive peripheral port. Test with a known-good cable.

Replace the peripheral cable if damaged. If the drive peripheral port is not supplying power, check for drive-level faults or hardware damage on the drive's control board. Try a replacement HIM to isolate the fault.

HIM shows communication error or repeatedly loses connection to the drive

Inspect the peripheral cable for physical damage, bent pins, or loose connections at either end. Check if the cable length exceeds the 3 m maximum. Verify drive firmware is compatible with the HIM version.

Replace the peripheral cable with a new one within the specified length limit. Update drive firmware if a compatibility issue is identified. If the problem persists, the HIM module may require replacement.

Parameter upload or download fails or does not complete

Confirm the drive is stopped and not in a fault state before initiating the transfer. Check that the HIM memory has not been corrupted by a previous failed operation.

Stop the drive and clear any active faults before retrying the upload or download. If the HIM memory appears corrupted, perform a HIM memory reset if supported, or replace the HIM and use a backup parameter file.

Drive faults immediately when HIM is disconnected during operation

The drive control source parameter is set to HIM control. When the HIM is removed, the drive loses its control reference and generates a fault.

Reconfigure the drive control source parameter to a hardwired or network input rather than the HIM if the HIM will be removed during operation. Alternatively, configure the drive response to HIM loss to a non-fault action such as hold last speed.

HIM keypad buttons are unresponsive or intermittently responsive

Inspect the HIM faceplate for physical damage, contamination, or moisture ingress behind the keypad membrane. Check if the issue is consistent across all keys or limited to specific ones.

Clean the keypad surface and check the panel cutout seal for integrity. If moisture has entered the unit, allow it to dry thoroughly. If the keypad membrane or internal PCB is damaged, the HIM module should be replaced.

Condition	Repair, Used, Refurbished, New in box (sealed)

Common defects

Common defects on a Allen-Bradley 20-HIM-H10 are:

Power Supply Related Issues

No power / drive not turning on
Blown fuses
Defective rectifier bridge
Damaged DC bus capacitors
IGBT / MOSFET module failure
Overvoltage / undervoltage errors

Control & Electronics Failures

Faulty control board or PCB damage
Firmware or memory corruption
Fieldbus communication errors (Profibus, Modbus, EtherCAT, CANopen)
Input / output circuit damage
Gate driver module failure

Motor Control Problems

Motor not starting or no output
Unstable speed control
No torque output
Trip during acceleration or deceleration
Encoder feedback errors

Thermal & Cooling Defects

Overheating due to failed cooling fans
Defective temperature sensors
Poor heatsink performance

Mechanical & Environmental Damage

Burnt or loose connectors
PCB track damage
Corrosion or moisture ingress
Oil, dust or contamination damage
Cracked solder joints

Error Codes & Drive Trips

Overcurrent faults (OC)
Ground fault / earth leakage error
Short-circuit fault
Motor or drive overload
Overvoltage or undervoltage error
Undervoltage trip when starting or stopping
Phase loss / imbalance
Synchronization issues with multiple drives

Other

Display defect
Control keys or keypad not working
Parameters no longer readable or lost
Brake resistor problems (brake chopper defect)
Internal relays/contactors defective
EMI/RFI interference due to defective filters