The 1756-IF6CIS is an Allen-Bradley analog input module used within ControlLogix systems. It provides six isolated current sourcing input channels, which are compatible with a 0 to 20 mA signal range. This module features a 16-bit resolution and uses the Sigma-Delta conversion method. It is designed to convert analog process signals into digital data for processing by the PLC, supporting applications such as HMI, SCADA, and control algorithms like PID controllers.

1756-IF6CIS Technical Specifications

• Inputs: 6 individually isolated current sourcing channels.
• Signal Range: 0 to 20 mA.
• Resolution: 16-bit, 0.34 µA per bit.
• Conversion Method: Sigma-Delta.
• Data Format: Integer mode (left justified, 2’s complement) or IEEE 32-bit floating point.
• Power Supply: 24 VDC (supplied by backplane).
• Power Dissipation: Max 5.1W at 60°C.
• Backplane Current:
  • 250 mA at 5V.
  • 275 mA at 24V.
• Sampling: Real-time sampling (RTS) for input scanning.
• Module Compatibility: Requires Removable Terminal Blocks (RTBs) 1756-TBCH or 1756-TBS6H.
• Alarm Features: Configurable high, low, and rate alarms for each input channel.
• Wire-Off Detection: Alerts when a wire is removed or disconnected.
• Digital Filter: Available in floating-point mode to smooth input data noise.