Does the NVR 5 Series support SNMP

Yes, the LILIN 5 Series NVR's support SNMP.

To enable SNMP, enter the NVR's menu. Select 'Network' from the left, then select 'Other' from the top bar. On the Blue 'Other' bar on the left you will see 'SNMP'.

Below is a screen shot of PRTG Network Monitor monitoring an NVR 5 Series