Extreme Networks ExtremeSwitching X435 Series Hardware Installation Manual page 310

Install a V300 in a DIN Rail Mount
3. Attach the PSUs to the DIN bracket using cable ties, and then attach the bracket to the DIN Rail:
Figure 249: V300HT-8P-2X DIN Rail Mount with dual XN-ACPWR-320W-HT PSUs
4. For PSU 16807, attach the port extender to the DIN Rail using one DIN bracket and the screws
provided.
310 ExtremeSwitching Hardware Installation Guide
Installing Expansion Modules