The 70L-IDC is a dual-channel DC input module manufactured by Grayhill, designed for fast switching polarized input applications with optical isolation. It features a maximum input voltage of 32 Vdc with an input voltage range of 0–32 Vdc, input current of 18 mA at maximum input voltage, and a nominal input resistance of 1800 O. The module includes a built-in status LED for channel monitoring, operates with a nominal logic voltage of 5 Vdc (range 4.5–28 Vdc), and provides maximum logic supply current of 6 mA per channel. With an isolation voltage of 2500 Vrms (IEC68-2-6), operating temperature range of -40°C to +85°C, and UL, CSA, CE certifications, the 70L-IDC is ideal for industrial control systems, PLC interfaces, and distributed I/O applications requiring reliable signal isolation and status indication.