16-Channel Isolated Sink/Source Digital Input FRNET Module. The FR-2053TA/FR-2053HTA has 16-channel isolated Sink/Source input, while the FR-2057TA has 16-channel isolated source output. The FR-2000 I/O module has an FRnet interface. The users can daisy chain several FR-2000 modules together. Via FRnet, the FR-2000 modules can extend the remote I/O control of PC, PAC and PLC easily. Further information about the networking of FR-2053TA/2057TA; re..