Everything you need to know about Input Data Types For 1756-IF16 in Rockwell Studio 5000.

All the key notes from this article has been from the Rockwell Allen-Bradley user manual or TechConnect notes.

The Rockwell Allen-Bradley 1756-IF16 and 1756-IF8 cards support the following wiring methods.
• Single-ended Wiring Method
• Differential Wiring Method
• High-speed Mode Differential Wiring Method

Once you have decided which wiring methos is for your project, you will have to configure the Rockwell Allen-Bradley 1756-IF16 and 1756-IF8 card accordingly.

Single-ended Wiring Method
Single-ended wiring compares one side of the signal input to signal ground. This difference is used by the module in generating digital data for the controller. When using the single-ended wiring method, all input devices are tied to a common ground. In addition to the common ground, the use of single-ended wiring maximizes the number of usable channels on the module (eight channels for the 1756-IF8 module and 16 channels for the 1756-IF16).

Differential Wiring Method
The differential wiring method is recommended for applications that can have separate signal pairs or a common ground is not available. Differential wiring is recommended for environments where improved noise immunity is needed. In differential mode, the channels are not totally isolated from each other. If multiple differential input signals have different voltage common references, one channel could affect the reading of another channel. If this condition cannot be avoided, then wire these inputs on different modules or replace the non-isolated module with an isolated input module.

Important: This wiring method lets you use only half a module’s channels. For example, you can use only eight channels on the 1756-IF16 module and four channels on the 1756-IF8 module.

High-speed Mode Differential Wiring Method
You can configure the 1756-IF16 and 1756-IF8 modules for a high-speed mode that gives you the fastest data updates possible. When using the high-speed mode, remember these conditions:
• This mode uses the differential wiring method.
• This mode only allows use of one out of every four channels on the module.

All the available Wirining Method in a single YouTube video.