Yes, SNMP (Simple Network Management Protocol) is supported on Mercury products with an Ethernet port except for the MR51e and MR62e. The EP series controllers supported v2c and the EP4502 and LP Series support both v2c as well as v3.
SNMP is off by default but can be enabled via the web configuration pages.
Mercury does not provide a custom MIB file. The products just use some of the standard networking MIB files. The MIB files include: