The model 89-IOS Input/Output Simulator Application Station adds to the 890-PECB Programmable Controller Troubleshooting Learning System to provide simulation of discrete inputs and outputs for fundamental PLC learning. The 89-IOS includes 16 2-position selector switches and 16 output indicators. Components are mounted to a silk-screened panel and wired to a single interface connector, which automatically plugs into the 890-PEC-B I/O and fault system when the panel is inserted into the 890-PEC-B workstation console. All components use 24VDC control power.