1756-IF16 ControlLogix analog input module

Description

1756-IF16 ControlLogix analog input module

The Allen-Bradley 1756-IF16 is a ControlLogix analog input module. This module accepts current

and voltage signals such as ±10V, 0-10V, 0-5V and 0-20 mA. This module supports Three (3) types

of signal wiring configuration such as single-ended, differential and high-speed differential wiring.

Among the supported wiring configurations, single-ended wiring is the most sensitive to noises and

must be used with signals having a common ground. For increased noise susceptibility, differential

wiring method is used while high-speed differential wiring is used in systems that require fast data updates, relative to the input signals.

With single-ended wiring, the module becomes a Sixteen (16) channel analog input module.

Similarly, the module is reduced to an Eight (8) channel analog input module when used with differential

wiring. Furthermore, the module becomes a Four (4) channel analog input module when the module is wired as high-speed differential wiring.

The 1756-IF16 individual resolutions are 320 µV/count (15 bits + sign bipolar) @ ±10.25V input range;

160 µV/count (16 bits) @ 0-10.25V input range; 80 µV/count (16 bits) @ 0-5.125V input range and 0.32

µA/count (16 bits) @ 0-20.5 mA. This module has scan time that varies such as16-488 ms for single-ended;

8-244 ms with differential wiring and 5-122 ms with high-speed differential wiring. It has a built-in analog-to-digital

converter circuitry using the Sigma-Delta method. Converted data is stored following integer mode

(left justified, 2 s complement) IEEE 32-bit floating point data format. This module has a calibrated

accuracy of better than 0.05% of range for Voltage input and 0.15% of range for Current input.

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