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1771-NOC
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Product Description
The Allen/Bradley/Rockwell Automation PLC 5 1771-NOC module is a high-resolution isolated-analog I/O module. It includes 8 channels that are used as inputs and these require a cable conversion process before operation.
Other Available Revisions for the 1771-NOC 1771-NOC//A1771-NOC//B1771-NOC//C
Common misspellings:
- l771-NOC
- 177l-NOC
- 1771-N0C
- 1771NOC
The 1771-NOC is a high-resolution isolated output analog module from Allen-Bradley and it is part of the 1771 Series N high-resolution modules. The module supports current outputs only. The outputs operate within a current range of between 0 and 25 milliamperes. The 1771-NOC has an output resolution of 3.2µA per bit with 13 bits unipolar. The module has an output impedance that is greater than 1MΩ and an output maximum drive capability of 20 milliamps at 0 to 1 kilo ohm and 25 milliamps at 0 to 700 ohms.
Additionally, the module has an overvoltage protection (output) of 140 Volts AC RMS (continuous), an offset drift rating of +/-1.0µA per degree Celsius, and its gain drift rating is +/-50ppm per degree Celsius. The 1771-NOC has a maximum module update time of about 25 milliseconds and a 500-microsecond settling time for the digital-analog converter. The module has a calibration accuracy (full range) of 0.01% at 25 degrees Celsius and 0.08% at 25 degrees Celsius.
At a minimum of 1% FSR (full-scale range), the 1771-NOC has a ramping value of 0.16 milliamps per second and 32 milliamps per second at a maximum of 200% FSR. Also, the 1771-NOC has a calibration values set 0.5 milliamps per 22 milliamps. The module exerts a current load of 2.8 amps at 20 milliamps and 3.2 amperes at 25 milliamps on the backplane and it dissipates 5 watts of heat at 5 Volts. Ensure proper grounding is implemented when handling the 1771-NOC since the module is sensitive to electrostatic charges.
Technical Specifications for 1771-NOC
| Manufacturer | Allen-Bradley / Rockwell Automation |
|---|---|
| Series | PLC 5 |
| Part Number | 1771-NOC |
| Product Type | High-Resolution Isolated Analog I/O Module |
| Power Supply | Backplane |
| Current | 4-20 mA |
| Outputs | Isolated |
| Regular Outputs | 8 |
| Conversion Required | Yes |
| Operating Temperature | 0-60 degrees Celsius |
About 1771-NOC
The 1771-NOC module is a high-resolution isolated analog I/O module that has been designed to be used with the remote termination panels known as RTPs. This PLC 5 module has been designed by Allen-Bradley/Rockwell Automation. The I/O module and the RTP it is connected to are meant to be connected by a 6-foot or 15-foot cable depending on the application requirements. There are several conversions that need to be made to both the 1771-NOC high-resolution isolated analog I/O module and the remote termination panels before attempting to install them together and since the conversions are somewhat complicated, it is required to have qualified technicians perform the whole installation to avoid errors. The compatibility between both devices needs to be verified before installation.
The Allen-Bradley/Rockwell Automation 1771-NOC high-resolution isolated analog I/O module comes with 8 I/O channels that are meant to be used as outputs. These channels can operate with a current range of 0 to 25 milliamps. This model receives power through the chassis backplane, so an external power supply is not required. The maximum current drawn by the module from this chassis power supply ranges from 1.5 to 3.3 Amps. The Allen-Bradley/Rockwell Automation 1771-NOC high-resolution isolated analog I/O module can be placed in any slot of the input and output chassis except for the leftmost slot which is reserved for different processors and adapters. To install this module, it is necessary to turn off the power for the entire input and output module chassis first.
The Allen/Bradley/Rockwell Automation PLC 5 1771-NOC module is a high-resolution isolated-analog I/O module. It includes 8 channels that are used as inputs and these require a cable conversion process before operation.
