Allen-Bradley 1747-L30D Programmable Controller

The Allen-Bradley 1747-L30D is a SLC 500 fixed-hardware PLC (processor module) that provides 30 I/O points for compact, discrete automation tasks. It offers 18 digital inputs at 24 V DC (sink type) and 12 outputs for 85–265 V AC loads (triac-based), all powered from 120/240 V AC. It ships with 1K words of onboard memory and supports DH-485 communications for networked control with compatible devices. A high-speed counter input handles counting up to 8 kHz, enabling simple pulse‑based feedback in timing or sequencing tasks. This fixed controller is designed for straightforward installation within SLC 500 systems, delivering a proven, cost-effective solution for small-to-medium manufacturing or packaging lines.