Software: LabVIEW 2018, LabVIEW FPGA
Hardware:
Two 7852R FPGAs, mounted in a PXIe 1062 crate with a 8135 crate controller. The RMIO ports (connectors 0) are interconnected by an RMIO cable.
Issue:
Wondering if our system RMIO interconnections are potentially problematic and causing excessive heating, or if heating is normal?
The FPGAs are part of a digital control system for a large power supply. The number of DIO available on the 7852 RDIO lines is insufficient, so we used the DIO lines on the RMIO to handle some of the overflow, passing the signals needed from one 7852 to the other using the RMIO DIO lines. Accordingly, one of the 7852 has the RMIO DIO lines 'Set Output Enable' set to FALSE, this is the unit receiving the signals, while the other transmitting unit has 'Set Output Enable' property set to TRUE. All other AI and AO lines of the RMIO connectors are unused. When the system is powered on, the RMIO cable and it's connectors get warm to the touch, much warmer than I would expect. I've looked around trying to find information as to whether this type of connection is problematic, maybe creating a situation where the analog lines drive into each other? So far I haven't been able to find much. Anybody know of any issues this would cause or if things getting warm is normal in this scenario?
P.S. PXIe crate is located indoors in an environment with a steady ambient temperature at normal room temps.
Thanks in advance.
