Product Summary
The Allen-Bradley 1771-IM digital input module brings reliable signal acquisition to PLC-5 systems. This unit accepts both AC and DC voltages. It handles up to eight devices like selector switches. Its wide voltage range simplifies integration into diverse control cabinets.
Expert Technical Evaluation & Performance Review
The 1771-IM module operates reliably within the PLC-5 chassis. It requires just 75 mA from the backplane. This low current draw minimizes power supply loading. Engineers can plan for a power dissipation between 0.4 W and 2.4 W. This thermal efficiency supports dense rack configurations.
Electrical performance depends on precise voltage thresholds. The module accepts an on-state voltage range of 184-276 Volts AC/DC. It requires a minimum on-state current of 2.9 mA. The off-state current stays below 1.0 mA. This clear distinction prevents false triggering from leakage.
Signal delay characteristics differ between AC and DC modes. For AC inputs, the delay from off to on is 20 ± 6 ms. The DC transition happens faster at 10 ± 4 ms. Both signal types have off delays around 20 ms. This predictable timing aids software debouncing logic.
Environmental performance supports harsh industrial floors. The module functions in temperatures from 32°F to 140°F. It tolerates non-condensing humidity levels between 5% and 95%. This robust design suits unheated warehouses or humid processing plants.
Nominal input currents vary by power type and frequency. The module draws 2.6 mA at 240V DC. At 220V AC, it pulls 3 mA at 50 Hz and 3.5 mA at 60 Hz. This compatibility allows global deployment without rewiring.
The module connects easily using the 1771-WA wiring arm. This terminal block simplifies field wiring changes. Its rack-mountable design integrates into standard Allen-Bradley chassis. Engineers can quickly replace modules without disturbing other I/O.
Logistics & Standard Packaging Details
We ship all orders via express delivery services. Your module travels through FedEx, UPS, and DHL. This ensures fast and trackable transit to your facility.
