Typical Specifications Parameter Specification / Value Module Type Digital Input Module Product Family ABB AC 500 PLC I/O Module (e.g., ECO Series, PM5xx) Number of Channels 16 Input Type Sinking (for PNP sensors) / Positive Common • "C" in NIOC-02C typically stands for "Common Positive" Rated Input Voltage 24 V DC (Nominal) Operational Voltage Range Typically 19.2 - 30 V DC Input Current per Channel Typically 3 - 5 mA at 24V DC "ON" Signal Voltage Level ≥ 15 V DC (typically) "OFF" Signal Voltage Level ≤ 5 V DC (typically) Response Time On-Delay / Off-Delay: Typically 1 - 3 ms Electrical Isolation 500 V AC (between field side and system/internal bus) Connection Type Removable screw-clamp terminal block (front connector) Status Indication Green LED per channel (indicates ON state) Internal Power Consumption From backplane: Typically ~ 50 - 100 mA (varies) Power for Sensors (if any) May provide a separate 24V DC auxiliary power for sensors. This is a key point to check in the datasheet. Mounting DIN-rail mountable (35 mm), snaps onto standard AC 500 base/rack. Operating Temperature 0°C to +60°C (standard commercial grade) Standards & Approvals cULus, CE, IEC 61131-2, etc.