This module facilitates the integration of various field devices, such as proximity switches, limit switches, and pushbuttons, into the PLC system by converting their DC signals into appropriate logic levels. It features input filtering to mitigate the effects of voltage transients caused by contact bounce or electrical noise, ensuring reliable signal processing. The module is equipped with status indicators for each input, allowing for straightforward monitoring and troubleshooting. It is compatible with 1771 Series B I/O chassis and requires a 10-terminal field wiring arm (cat. no. 1771-WA) for connections.
Features:
- Number of Inputs: 8
- Input Voltage Range: 10 to 27V DC
- Nominal Input Current: 8 mA at 12V DC; 24 mA at 24V DC
- Maximum Off-state Current: 3.0 mA
- Maximum Off-state Voltage: 7.0V DC
- Minimum On-state Voltage: 10V DC
- Input Impedance: 1 to 2 kΩ (on-state); 2 to 3 kΩ (off-state)
- Input Filtering Delay: Approximately 12 ms (ON), 20 ms (OFF)
- Status Indicators: 8 red LEDs
- Backplane Current Consumption: 74 mA
- Operating Temperature Range: 0°C to 60°C
