• Controller Type: Fixed I/O SLC 500 Controller (discontinued/obsolete) • Line Power: 120/240V AC • Inputs: 24 points of 24V DC sinking inputs (with high-speed counter capability) • Outputs: 16 AC/DC relay outputs • Memory Capacity: 1K instruction capacity (RAM with capacitor backup; optional EEPROM/UVPROM backup) • User Power: Built-in 24V DC / 200 mA user sensor power • Communication Port: DH-485 communication port • Expansion: Supports an optional 1746-A2 2-slot expansion chassis • Programming Software: Programmed using RSLogix 500