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The Allen-Bradley 1746-IG16 SLC 500 is a robust Current Sourcing Transistor-Transistor Logic Input Module designed for seamless integration with the SLC 500 controller platform. This module offers 16 TTL input points, operating within a 4.5-5.5V DC voltage range with excellent noise immunity and electro-optical isolation rated at 1500V. It is engineered to endure challenging environments with a vibration tolerance of 2.5G and operational shock resistance up to 30G, maintaining performance in temperatures from 0 to 60°C and relative humidity levels between 5-95%. Certified by UL and CSA for use in hazardous locations, the 1746-IG16 module distinguishes itself with an inversed functionality, requiring careful handling to prevent electrostatic discharge and ensuring reliable signal interfacing up to 50 feet per point.