1771-IFF Allen-Bradley PLC5 Analog Input 5ms Fast Scan

Allen-Bradley 1771-IFF High-Speed Analog Input Module for PLC5

Key Technical Specifications

• Brand & Model: Allen-Bradley 1771-IFF analog input module.
• Input Configuration: 16 single-ended or 8 differential (software‑selectable).
• Voltage Ranges: 0-5V DC, 1-5V DC, ±5V DC, ±10V DC.
• Current Ranges: 4-20mA, 0-20mA, ±20mA, ±40mA.
• Resolution & Data Format: 12-bit binary plus sign; natural binary or BCD scaling to ±9999.
• Update Time (Fast): 5 ms for 8 channels, 10 ms for 16 channels.
• Backplane Current: 750 mA @ 5V DC (no external power supply needed).
• Protection & Isolation: Optoelectrical isolation guards against transients; conformal coating resists moisture and corrosion.
• Noise Rejection: Built-in digital filtering reduces electrical noise on signal wiring.
• Signal Delays (typical): DC Off 20 ms (±9 ms); AC Off 24 ms (±10 ms).
• Power Dissipation: 2.5 Watts max (8.52 BTU/hr).
• Mounting & Wiring: Rack mountable, 1 slot width; includes 1771-WG wiring arm.

Frequently Asked Questions (FAQ)

• What makes the 1771-IFF faster than other analog modules? The 1771-IFF offers a 5 ms update time for 8 channels, compared to 18 ms on standard modules. This speed suits applications requiring rapid sampling, such as closed‑loop control or fast process monitoring.
• Can the 1771-IFF handle ±40 mA current signals? Yes, it supports an extended current range of ±40 mA in addition to the standard 4‑20mA, 0‑20mA, and ±20mA ranges. This makes it compatible with a wider variety of industrial transmitters.
• Does the module work with both single‑ended and differential sensors? Absolutely. You can configure each channel group for single‑ended (16 inputs) or differential (8 inputs) mode via software, depending on your wiring and noise immunity needs.
• How does the 1771-WG wiring arm simplify maintenance? The wiring arm remains in the chassis when you remove the electronic module. You can replace the 1771-IFF without disconnecting any field wiring, saving time and preventing wiring errors.
• What do the front‑panel LEDs indicate? A steady green RUN light signals normal communication with the PLC5. A red FAULT light warns of configuration errors, loss of communication, or internal faults.
• Is an external power supply required? No, the 1771-IFF draws all necessary power (750 mA at 5V) from the backplane of the 1771 I/O chassis.
• What is your typical shipping time for this module? We keep the 1771-IFF in stock as new original surplus. We ship within 5 days after order confirmation via FedEx, UPS, or DHL.
• Can I return the module if it doesn't meet my requirements? Yes, we accept returns within 30 days. The module must be in new, unused condition with its original packaging.

Contact Information Inquiries: sales@nex-auto.com | +86 153 9242 9628

Partner: NexAuto Technology Limited