DEC - 18-ch - I/O Module 18-Channel Digital Isolated Modbus TCP 18-ch - Digital - Isolated I/O Modbus TCP Module $559.26
Isolated - 16-ch - I/O Module 16-Channel Digital Isolated Modbus TCP 16-ch - Isolated - Source-type Digital I/O Modbus TCP Module $454.03
DEC - B2110-AA - I/O Module AlphaServer 2000 2100 B2110-AA - DEC - I/O Module for AlphaServer 2000 / 2100 $138.43 $117.31
NI - 9215 - Data Acquisition Module BNC 16-Bit 100KS/s 4-CH National Instruments - 9215 - NI BNC 16Bit 100KS/S/CH 4-CH Simultaneous Sampling $585.23 $475.80