This is extender PCB for debugging, repair and adjustment use in Fluke calibrators, such as 57xx/55xxA and others. Also works with other equipment equipped with DIN 41612 series connectors.

Details available at https://xdevs.com/fix/hulk3/#dinext

Each board provides direct connection between two DIN 41612 dual-row 64 pin connectors.

These connectors and extenders can be used used in next high end calibrators and test equipment:

• Fluke 5500A calibrator
• Fluke 5520A calibrator
• Fluke 5522A calibrator
• Fluke 5502A calibrator
• Fluke 5700A high-performance calibrator
• Fluke 5720A high-performance calibrator
• Fluke 5730A high-performance calibrator
• Fluke 5790A AC voltage standard
• Fluke 5790B AC voltage standard
• Measurements International 6010 (all variants) resistance bridge
• Measurements International 6020 (all variants) resistance bridge
• and more

Here's example of extender used to troubleshoot Fluke 5720A REFDAC A11 assembly:

Multiple extenders can be used together in both forward and reverse connector position: