Configured for analog signal acquisition in PLC-5 I/O chassis networks, the Allen-Bradley 1771-IFEK (1771-IFE Analog Input Module) provides direct physical/electrical execution.

Hardware Variant Matrix

• 1771-IFEK: Conformally coated revision module featuring 16-point single-ended or 8-point differential analog signal input channels.
• 1771-IFE: Standard non-coated 12-bit analog input module base hardware architecture.

Technical Performance Parameters

Deterministic System Bus Integration

The card interfaces directly with the 1771 backplane bus, maintaining high communication velocity during block transfer read/write cycles. Full firmware flash compatibility with PLC-5 processors guarantees deterministic data mapping across EtherNet/IP bridges and ControlNet networks, optimizing overall I/O density scaling.

Package Fulfillment List

• 1 x Allen-Bradley 1771-IFEK module
• Protective anti-static enclosure shield
• Keying band set for chassis slot assignment

Field Wiring and Cabinet Installation

• Ensure 1771 I/O chassis power supply is completely switched off before inserting card into backplane slot.
• Set internal jumper headers to select between single-ended or differential voltage/current mode options.
• Align board circuit edges with top and bottom chassis guides; press firmly until card locks into latch mechanism.
• Terminate all analog signal shield wires directly to the 1771 wiring arm chassis ground bus terminal.
• Maintain physical separation between low-level analog signal leads and high-voltage AC power wiring runs.

Frequently Asked Questions

• What backplane current does this analog card draw during operation?

  The module consumes 750 mA at 5 VDC directly from the 1771 chassis backplane power bus.

• Is external power supply input required for module operation?

  No external power supply is needed; all board logic and analog processing circuits operate on backplane current.

• What physical protection does the 'K' suffix denote on this unit?

  The 'K' suffix indicates a factory-applied conformal coating designed to protect printed circuit traces against environmental contaminants.

• What analog voltage ranges are selectable on input channels?

  Supported voltage input configurations include 0-5 VDC, 1-5 VDC, +/- 5 VDC, and +/- 10 VDC operating ranges.

• What input current ranges are supported for process loops?

  Process loop current configurations accept 4-20 mA, 0-20 mA, and +/- 20 mA analog input signals.

• Can this module be hot-swapped while the 1771 backplane is energized?

  Hot-swapping is prohibited. Removing or inserting modules under power causes backplane bus errors and potential connector pin damage.

• What conversion resolution is provided by the analog-to-digital circuit?

  The onboard analog-to-digital conversion architecture provides 12-bit binary signal resolution across configured ranges.

• What typical signal delay occurs during AC input filtering?

  The board exhibits a typical AC signal delay (off response) of 24 ms (+/- 10 ms) during input processing.