Product Overview
When legacy analog input modules in your SLC 500 control system no longer meet performance demands, the Allen-Bradley 1746-NI16V offers a reliable upgrade path. This 16-input voltage analog I/O module delivers precise signal conversion with 16-bit resolution and programmable filtering, making it an ideal replacement for older modules requiring ±10V, 0-10V, or 1-5V DC signals. Designed for the SLC 500 platform, the 1746-NI16V occupies a single slot (except slot 0) and integrates seamlessly with the backplane.
Technical Specifications
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Inputs: 16 voltage channels
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Resolution: 16 bits
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Bandwidth: 6–250 Hz (programmable filter frequencies: 6, 10, 20, 40, 60, 80, 100, 250 Hz)
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Signal Types: ±10V DC, 1-5V DC, 0-5V DC, 0-10V DC
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Backplane Current: 125 mA at 5V; 75 mA at 24V DC
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Isolation: 500V AC for 1 second
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Conversion Type: Sigma-Delta
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Step Response: 9–630 ms
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Input Impedance: 20 Ω
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Operating Temperature: −25 to 60 °C
Application Scenarios
In process control environments, the 1746-NI16V handles analog signals from pressure transmitters, temperature sensors, and flow meters. For example, a chemical plant upgrading from a 12-bit module can achieve finer resolution for batch control. In packaging machinery, the module’s programmable filter rejects electrical noise, improving signal integrity on high-speed lines. Its 500V isolation protects downstream PLC logic in industrial settings with ground potential differences.
Installation Guide
Mount the Allen-Bradley 1746-NI16V in any SLC 500 I/O slot except slot 0 (reserved for the processor). Use the 1746-RT25G terminal block or pre-wired cables (Belden #8761 or equivalent) with Allen-Bradley 1492-AIFM8-3 or 1492-AIFM16-F-3 termination blocks. Always disconnect power before inserting or removing the module to prevent arcing. The module fits local or expansion chassis, occupying one slot.
Compatibility & Integration
The 1746-NI16V communicates with SLC 500 processors via the parallel backplane interface, drawing power from the chassis power supply. It works with all SLC 5/02, 5/03, 5/04, and 5/05 controllers. For applications needing isolated analog inputs, this module integrates directly without additional signal conditioners—simplifying system architecture. It is UL listed, C-UL approved, and CE compliant for Class I Division 2 hazardous locations.
Selection Guide & Purchasing Advice
Before purchasing, verify your system voltage requirements (5V and 24V backplane currents available) and confirm slot availability in your SLC 500 chassis. The 1746-NI16V accepts voltage inputs only—for current inputs, consider the 1746-NI4I or 1746-NI8I. For a reliable source, UBEST Automation (ubest101) stocks this module with fast shipping. Contact our team to confirm compatibility with your existing SLC 500 system.