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. Honeywell 2MLI‑D21D Digital Input Module Introduction The Honeywell 2MLI‑D21D Digital Input Module is a high-performance DC input module designed for the MasterLogic‑200 PLC series. It provides reliable detection and transmission of discrete DC signals from sensors, switches, *Your Name: *Your Email: *Your Name: *Vdcode: Submit