RS-485 I/O Modules
ADAM-4000 modules are the perfect choice for establishing a cost-effective
remote I/O system. Customers can benefit from ADAM-4000 modules through its
simple wiring --- using only two wires to communicate with their controller or
other RS-485 devices. ADAM-4000 modules use the EIA RS-485 communication
protocol; the industry's most widely used bi-directional, balanced transmission
line suitable for industrial environments.