Mr. Pitchford,
Are you referring to the sg300-50 switch, which has a product id of SRW2048-K9?
If that is the case, you would have to put the switch in layer 3 mode via the console or telnet.
Once in layer three mode you can go to ip configuration and make static routes.
You will also be able to put ip addresses on vlans, ports or lags in the switch.
The srw2048 will not do layer 3 mode but the sf or sg300 series switches will support it.