Specifications Parameter Category Details Manufacturer & Series Schneider Electric, Modicon TM3 Complete Model Number TM3DI8 Module Type Digital Input Module Number of Channels 8 Input Type Sink/Source (PNP/NPN) compatible. Can be wired in either common negative (sinking) or common positive (sourcing) configuration. Rated Input Voltage 24V DC Nominal Input Current Typically 4 mA per channel at 24V DC. "1" Signal Voltage Range 15V to 30V DC (Logic "1" = ON). "0" Signal Voltage Range 0V to 5V DC (Logic "0" = OFF). Input Impedance Typically 4.7 kΩ. Input Filter Standard filtering to suppress contact bounce and electrical noise. Response Time Typically < 5 ms (from signal change to recognition by the controller). Status Indicators • 1x Module Status LED (Bicolor): RUN/ERR (Green/Red) • 8x Channel Status LEDs (Green): Indicates ON state (logic "1") of each input. Connection Removable screw terminal block (front connector) for field wiring. Wire Gauge (Terminal) Solid or stranded: 0.5 mm² to 1.5 mm² (AWG 20 to AWG 16) Power Supply The module's electronics are powered via the 5V DC TM3 backplane from the base unit. The 24V DC field sensing voltage must be supplied externally to the input terminals. Backplane Current (5V DC) Typically 30 mA (supplied via the TM3 base unit). Isolation 500V AC between field side (inputs) and logic side (bus). No isolation between individual input channels. Operating Temperature 0°C to +55°C Storage Temperature -25°C to +70°C Relative Humidity 5% to 95% (non-condensing) Pollution Degree 2 Protection Rating IP20 (for installation inside an enclosure) Mounting DIN rail (35mm) mounting via a compatible TM3 base unit (e.g., TM3XB). Compatible Controllers Modicon M221, M241, M251, TM2, and other PLCs supporting the TM3 I/O system. Configuration Automatically detected and configured by the controller's programming software (EcoStruxure Machine Expert). No software configuration of the module itself is required for basic operation. Typical Applications Connecting push buttons, selector switches, proximity sensors (PNP or NPN), photoelectric sensors, limit switches, and other dry contact or solid-state devices to the PLC system.