1746-NR4 Allen-Bradley PLC 1746 RTD and Thermocouple Modules 4 Input 16 bits New

1746-NR4 Allen-Bradley PLC 1746 RTD and Thermocouple Modules 4 Input 16 bits New

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PLCAGE: 1746-NR4 Allen-Bradley PLC 1746 RTD and Thermocouple Modules 4 Input 16 bits New

Features

The RTD module receives and stores digitally converted analog data from RTDs or

other resistance inputs such as potentiometers into its image table for retrieval by

all fixed and modular SLC 500 processors. An RTD consists of a temperature-sensing element connected by 2, 3 or 4 wires that provide input to the RTD module.

Specification

	1746-NR4	1746-NR8
Backplane Current Consumption	50 mA at 5V dc 50 mA at 24V dc	100 mA at 5V dc 55 mA at 24V dc
Backplane Power Consumption	1.5W maximum (0.3 W at 5V dc, 1.2 W at 24V dc)	1.82W maximum (0.5W at 5V dc, 1.32W at 24V dc)
External Power Supply Requirements	None
Number of Channels	4 (backplane isolated)	8 (backplane isolated)
I/O Chassis Location	Any I/O module slot except slot 0
A/D Conversion Method	Sigma-Delta Modulation
Input Filtering	Low pass digital filter with programmable notch (filter) frequencies
Common Mode Rejection (between inputs and chassis ground)	> 150 dB at 50 Hz (10 Hz and 50 Hz filter frequencies) > 150 dB at 60 Hz (10 Hz and 60 Hz filter frequencies)	> 120 dB at 50 Hz (28 Hz and 50 Hz filter frequencies) > 120 dB at 60 Hz (28 Hz and 60 Hz filter frequencies)
Normal Mode Rejection (between [+] input and [-] input)	Greater than 100 dB at 50 Hz (10 Hz, 50 Hz filter frequencies) Greater than 100 dB at 60 Hz (10 Hz, 60 Hz filter Frequencies)	65 dB at 50/60 Hz (with 50/60 Hz filter) 110 dB at 50 Hz (with 28 Hz filter) 95 dB at 60 Hz (with 28 Hz filter)
Maximum common mode voltage	± 1 volt
Maximum allowed permanent overload	Volts: ± 5V dc Current: ± 5mA
Input Filter Cut-Off Frequencies	2.62 Hz at 10 Hz filter frequency 13.1 Hz at 50 Hz filter frequency 15.72 Hz at 60 Hz filter frequency 65.5 Hz at 250 Hz filter frequency	7.80 Hz at 28 Hz filter frequency 13.65 Hz at 50/60 Hz filter frequency 209.6 Hz at 800 Hz filter frequency 1676 Hz at 6400 Hz filter frequency
Calibration	Module autocalibrates when power is applied, a channel is enabled or when a change is made to its input type, filter frequency, or excitation current.	Set module calibration disable to zero to enable module to autocalibrate when power is applied, a channel is enabled, or when a change is made to the input type, filter frequency, or excitation current.
Isolation (optical)	500V dc continuous between inputs and chassis ground, and between inputs and backplane	707V dc for 1 minute
Isolation Between Inputs	None	±5V dc