If you have questions about our products, Fill out the form below and we will answer any questions you have. Tips: Fields marked with*are required. ABB Bailey SPDSI14 16-channel Digital Input Module Technical FAQs How many discrete inputs does the SPDSI14 support? It supports 16 independent digital input channels in one module. What voltage level does it use for logic inputs? Designed for 24 VDC nominal logic voltage common in industri *Your Name: *Your Email: *Your Name: *Vdcode: Submit