Allen-Bradley 1771-IND Input Module

The 1771-IND module converts AC or DC signals from field devices into logic-level inputs for the PLC system. It supports a nominal input voltage of 24V AC at 50/60 Hz or 24V DC, with an input impedance of 0.68 µF in parallel with 6.28 kΩ (3.9 kΩ at 60 Hz) in series with 100 Ω. The module features 16 input points, each equipped with red status indicators for easy monitoring. A green "Module Active" indicator provides overall status. The 1771-IND is compatible with various 1771 I/O chassis models, including 1771-A1B, -A2B, -A3B, -A3B1, -A4B, -AM1, and -AM2.

Features:

• Inputs per Module: 16
• Nominal Input Voltage: 24V AC at 50/60 Hz; 24V DC
• Nominal Input Current: 7.2 mA at 24V AC (60 Hz); 6.3 mA at 24V AC (50 Hz); 3.8 mA at 24V DC
• On-State Voltage Range: 16V to 30V AC; 9V to 30V DC
• Minimum On-State Current: 3.0 mA at 10V AC (60 Hz); 1.4 mA at 9V DC
• Maximum Off-State Voltage: 5V AC at 50/60 Hz; 3.7V DC
• Maximum Off-State Current: 1.5 mA at 5V AC (60 Hz); 0.6 mA at 5V DC
• Input Impedance: 0.68 µF in parallel with 6.28 kΩ (3.9 kΩ at 60 Hz) in series with 100 Ω
• Peak Inrush Current: Vps/100 Ω, where Vps = customer supply peak voltage
• Input Signal Delay: On to Off: 20 ms; Off to On: 35 ms
• Indicators: 1 green "Module Active"; 16 red input status
• Module Location: Compatible with 1771-A1B, -A2B, -A3B, -A3B1, -A4B, -AM1, -AM2 I/O chassis