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- Stock: In Stock
- Model: 1746-NR4
- Weight: 2.00kg
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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 |