The L5392 is long discontinued and no longer available from Parker SSD, nor is it something we support repairs on any longer.
The L5392 was a touchscreen interface specifically designed for older SSD LINK network based systems (LINK2 - acrylic fiber) and also had four rear slots for adding various option cards, such as digital I/O, DeviceNet, Profibus, etc.
There is not a direct replacement option for the L5392 and we recommend an overall system upgrade to a LinkNet based network topology. This will include integrating a new HMI solution as an operator panel, typically connected to the network via Modbus/TCP.
Contact your local Parker distributor or integrator for help in assessing your system requirements toward the upgrade. Or you can contact Parker at 800-358-9070 or email@example.com for immediate questions and help.