The ISO-730 has 32 isolated digital I/O channels (16 D/I and 16 D/O) and 32 TTL digital I/O channels. Each of the 16 isolated digital input channels accept voltage from 5 V ~ 30 V and has 1.2 kΩ resistance of. Every eight input channels use one external common ground. For example, channel 0~7 use EI.COM1 and channel 8~15 use EI.COM2. Each of the 16 isolated digital output channels equipped a darlington transistor. Every eight output channels use the common emitter. The power supply of the output port should use the external power. The channels 0~7 uses EO.COM1 and channels 8~15 use EO.COM2. The board interface to field logic signals, eliminating ground-loop problems and isolating the host computer from damaging voltages. The ISO-730 has 32 isolated digital I/O channels (16 D/I and 16 D/O) and 32 TTL digital I/O channels. Each of the 16 isolated digital input channels accept voltage from 5 V ~ 30 V and has 1.2 kΩ resistance of. Every eight input channels use one external common ground. For example, channel 0~7 use EI.COM1 and channel 8~15 use EI.COM2. Each of the 16 isolated digital output channels equipped a darlington transistor. Every eight output channels use the common emitter. The power supply of the output port should use the external power. The channels 0~7 uses EO.COM1 and channels 8~15 use EO.COM2. The board interface to field logic signals, eliminating ground-loop problems and isolating the host computer from damaging voltages.