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. Allen Bradley 1734-4IOL Combined Modules Product Engineering Overview (Introduction) The Allen Bradley 1734-4IOL Combined I/O Module is a compact distributed I/O device designed to provide both input and output capabilities within a single POINT I/O module. This design improves sy *Your Name: *Your Email: *Your Name: *Vdcode: Submit