Description
Overview
Essential details:1756SC-IF8U Allen-Bradley 1756 ControlLogix compatible universal analog input module
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1756SC-IF8U Allen-Bradley 1756 ControlLogix compatible universal analog input module
The 1756sc-IF8U is a universal analog input module that is manufactured by Spectrum Controls, an Allen-Bradley encompass partner company. Spectrum controls manufactures Logix compatible modules such as I/O and communication modules. The 1756-IF8U specifically offers capability of accepting a wide variety of inputs signals for measurement of different process variables. Compatible inputs signals are Voltage, Current, Resistance, Thermocouple, and Resistance Temperature Detector (RTD).
The 1756-IF8U specifically accepts Thermocouple (J, K, T, B, E, R, S, N, C), Resistance Temperature Detector (RTD) (PT385/3916, Ni618/672, NiFe518, Cu426), Resistance (0-150, 0-1000, 0-3000 ohms), Current (0-20 mA, 4-20 mA), and Voltage (±50 mV, ±100 mV, 0-5 V, 1-5 V, 0-10 V, ±10 V) input signals. It is a single-slot module that mounts directly to any ControlLogix chassis such as 1756-A4, 1756-A7, 1756-A13, and 1756-A17.
The 1756-IF8U has an input resolution range of 16-21 Bits, depending of the selected channel filters. Selectable channel filters are 10 Hertz with an update time of 0.99 seconds; 50/60 Hertz for update time of 0.19 seconds; 100 for 0.13 seconds; 250 Hertz for 0.07 seconds, and 1000 Hertz fo 0.04 seconds update. For module isolation, the 1756-IF8U has 12.5 Volts DC channel-to-channel isolation; 1000 Volts AC field-wiring-to-backplane, and 1000 Volts AC field-wiring-to-chassis-ground. This module has an accuracy of 0.1% of range at 0 °C to 25 °C.
Recommended cables for terminating signals to the 1756-IF8U include shielded, twisted-pair TC extension wire for thermocouple inputs; Belden 8761 or equivalent for mV, V, and mA input signals; Belden 9501, 9533, or 8350 when the module is configured to accept RTD signals.