Product Summary
The 1771-ID16 provides 16 isolated digital inputs for 120V AC/DC signals. This module suppresses voltage transients from contact bounce. Its selectable filtering enhances power quality and reduces downtime. You get reliable operation with float switches, pushbuttons, and limit switches.
Theme A: Product Procurement & Buyer Guide
Procurement managers need a module that handles both AC and DC voltages. The 1771-ID16 operates across 77–138 VAC and 105–138 VDC. This flexibility reduces inventory complexity. You standardize one module for multiple field inputs.
The module draws only 75 mA from the backplane. This low current preserves power budget in your PLC-5 chassis. Its 16 inputs come on a single 40-terminal field wiring arm (1771-WN). That arm attaches to the pivot bar for hot-swap capability.
Field engineers appreciate the customer-selectable input filtering. The factory default is 9 ms, but you adjust it to suit noisy environments. Typical AC signal delay is 1 ms on and 9 or 18 ms off. For DC, delay is 1 ms on and 9 ms off. This predictable timing simplifies control logic.
The isolated inputs work with multi-phase circuits. They interface directly with selector switches, float switches, and pushbuttons. You avoid extra signal conditioning hardware. The module fits standard 1771-A1B, A4B, or later I/O chassis.
Theme D: Expert Technical Evaluation & Performance Review
From an engineering standpoint, the 1771-ID16 excels in suppressing electrical noise. The capacitive impedance input creates an initial inrush current. This design filters transients effectively. Maximum off-state current is 4.0 mA AC and 1.8 mA DC, minimizing false triggers.
The signal delays are consistent. AC turning on takes 1 ms, turning off takes 9 or 18 ms (filter dependent). DC turning on takes 1 ms, turning off takes 9 ms. These values allow precise sequence timing in your PLC program.
Physical dimensions are compact at 3.5 x 6.5 x 2.0 inches. The wiring arm 1771-WN ships with the module. You remove or insert the module without disturbing field wires. This simplifies maintenance and reduces downtime during troubleshooting.
The module’s isolated inputs protect against ground loops. It works with both 120V AC and 125V DC nominal voltages. The voltage tolerance covers typical industrial fluctuations. You rely on it for harsh environments with electrical noise.
Logistics & Standard Packaging Details
- One Allen-Bradley 1771-ID16 digital input module
- One 1771-WN 40-terminal field wiring arm (attached)
- Installation instructions sheet
Express delivery shipping is available via FedEx, UPS, and DHL. We ship from stock to minimize your lead time. Contact our sales team for bulk order discounts.
