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 620-1531 Processor Module Core Control Unit for Legacy Automation Platforms The Honeywell 620‑1531 Processor Module serves as the central processing engine for older Honeywell ISSC 600 and UCN/IPC industrial control systems. As the primary logic execution unit, it *Your Name: *Your Email: *Your Name: *Vdcode: Submit