RTSI-Bus Test NI 7334

I use one encoder phase of a 7334 via RTSI as external clock for NI PCIe 6341. The 6341 was damaged by overvoltage. I changed it. All motion functions off th 7334 seems to work. Only i have problems with the external clock on 6341. Is there any way to test the RTSI bus ?? May only the RTSI part of the 7334 be damaged?

Thanks Anita