I would not recommend using this obsolete product to communicate to the PAC.

https://www.automationdirect.com/adc/shopping/catalog/retired_products/hmi_(human_machine_interface)/op-420

For Use With DL05, DL06, DL105, DL205, DL305, DL405 and Allen-Bradley SLC5/03 & SLC5/04 and Micrologix CPUs

Take a look at the C-more Micro or C-more EA9 panels.

C-More Micro

C-More

Regards,

Garry

https://accautomation.ca/series/c-more-micro-hmi/

https://accautomation.ca/series/c-more-hmi-series-panel/