Allen-Bradley 1771-IQ16 16-Point Input Module

Product Overview

The Allen-Bradley 1771-IQ16 is a 16-point isolated digital DC input module for PLC-5 1771 I/O systems. It accepts 10–32V DC signals with channel-to-backplane isolation, providing reliable signal acquisition for sensors, switches, and other DC field devices in industrial automation environments.

Key Specifications

• Number of Inputs: 16 isolated digital inputs
• Input Type: Digital DC
• Input Voltage Range: 10–32 V DC
• Isolation: Channel-to-backplane isolation
• Backplane Current: 100 mA @ 5V DC
• Input Signal Type: DC
• Module Type: Isolated input
• Compatibility: Allen-Bradley 1771 I/O systems
• Mounting: Chassis-mounted

Features & Benefits

• 16 Isolated Input Points: High-density signal acquisition within a single module slot
• Wide DC Input Range: 10–32V DC supports common industrial control voltages including 12V and 24V DC
• Isolated Input Design: Protects the control system from electrical noise and voltage transients
• Low Backplane Current: Only 100 mA @ 5V DC minimizes power supply loading
• Chassis-Based Integration: Seamless installation in standard 1771 I/O racks
• Industrial-Grade Construction: Built for stable operation in demanding automation environments

Applications

• 24V DC proximity sensor interfacing
• Pushbutton and limit switch monitoring
• Machine control discrete signal acquisition
• Process automation monitoring systems
• Safety circuit input detection

Installation Guide

1. Chassis Slot Selection: Install the 1771-IQ16 into any available slot in a 1771-series I/O chassis.
2. Backplane Power Check: Verify the chassis power supply can provide 100 mA @ 5V DC for this module.
3. Field Device Verification: Confirm all field devices output 10–32V DC signals within the module's specified range.
4. Wiring Connection: Use the appropriate wiring arm (1771-WH or 1771-WN) for screw-terminal field connections.
5. Grounding: Ensure proper cabinet grounding. Use shielded cables for long wire runs in electrically noisy environments.
6. Status Verification: Power up the system and verify input status LEDs respond correctly to field device activation.

FAQ

Q: What voltage does the 1771-IQ16 require?
A: The module accepts 10–32V DC input signals. It is not compatible with AC signals.

Q: Is the 1771-IQ16 compatible with ControlLogix?
A: No. The 1771-IQ16 is designed for PLC-5 systems with 1771 I/O chassis only.

Q: How much backplane current does the 1771-IQ16 draw?
A: The module draws 100 mA at 5V DC from the backplane.

Q: Can I use 5V DC signals with this module?
A: No. The minimum ON-state voltage is 10V DC. For 5V TTL applications, use the 1771-IG or 1771-IGC module.

Selection Tips

• Verify all field devices output 10–32V DC before selecting this module
• For AC input applications, use 1771-IAN (120V AC) or 1771-IND (24V AC/DC)
• Consider 1771-IQ16 for applications requiring isolated DC inputs with moderate density
• Ensure wiring arm compatibility (1771-WH or 1771-WN) for your installation
• For new designs, evaluate ControlLogix 1756-IB16I or CompactLogix 1769-IQ16