- SMIDC5D
- Crydom Corporation
- DC Input Module
- G3TC-IDC5DC/AC24
- Omron Electronic Components Llc
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- Opto 22
- I/O Module Relays Input Module 4000V
- SNAP-IDC5DFM
- Opto 22
- DIGITAL INPUT MODULE
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- Silicon Power Cube Corp.
- Solid State Opto-Isolated I/O Modules