USB, Digital Output Board, 7 Channels, Current Sink Output, Bus-powered

Keithley KUSB-3160 (96 channels of Digital I/O, all on USB interface)

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DATEL BWR-15/330-D12 26219541 Isolated DC/DC Converters 10W 12v/+-15V+-330mA

2PCS Switching Power Supply Board Isolated Regulated Power Module 12V1A New

Waveshare Industrial Isolated Multi-Bus Converter USB / RS232 / RS485 / TTL

8DI-8DO Digital Input and Output Module Optocoupler Isolated RS485 MODBUS New

5V 12V 24V Dual Isolation Isolated Switching Power Supply Module Board AC-DC