A-B 1746-NI16I Analog Input Module

The A-B 1746-NI16I is an Allen-Bradley (A-B) analog input module designed for use with the SLC 500 series of programmable logic controllers (PLCs). Here’s a detailed breakdown of its specifications and features:

Key Features:

1. Model Number: 1746-NI16I
   • “NI” indicates it is an analog input module.
   • “16I” specifies 16 single-ended or 8 differential analog input channels.
2. Input Type:
   • Voltage Inputs: 0-10V DC, ±10V DC, 1-5V DC, ±5V DC
   • Current Inputs: 4-20mA (requires external shunt resistor for some configurations)
3. Resolution:
   • 12-bit resolution (4096 discrete steps per channel).
4. Sampling Rate:
   • Each channel is sampled at approximately 2.5ms (all channels scanned sequentially).
5. Isolation:
   • Channel-to-channel isolation (1500V AC for 1 minute).
   • Backplane isolation (30V AC continuous).
6. Configuration:
   • Jumpers or software configuration (via RSLogix 500) for voltage/current selection.
   • Supports single-ended or differential input wiring.
7. Environmental:
   • Operating Temperature: 0°C to 60°C (32°F to 140°F).
   • Storage Temperature: -40°C to 85°C (-40°F to 185°F).
8. Compliance:
   • UL, CUL, CE, and other industrial certifications.

Typical Applications:

• Industrial automation (process control, machine monitoring).
• Data acquisition from sensors (temperature, pressure, flow, etc.).
• Integration with SLC 500 PLCs for analog signal processing.

Wiring Considerations:

• Single-Ended Inputs: Use one terminal per channel (common negative shared).
• Differential Inputs: Use two terminals per channel (higher noise immunity).
• Ensure proper grounding to avoid signal interference.