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Description：

The 1771-NOC/B is one edition in the High-resolution Isolated Analog Modules series. The high resolution and accuracy of this module allow the user to control processes with a tighter tolerance. The 1771-NOC/B has 16-bit input and 14-bit output resolution. This module has 0.01% typical accuracy based on 65,000 count capability over Full-Scale Range (FSR). Equipped with programmable reset values for outputs, it selects the best reset value specified by the application requirements (each channel is configured independently). The 1771-NOC/B has a power dissipation of 5.5 Watts at 5 Volts. The operating temperature of this unit ranges from 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit), and its storage temperature ranges from -40 to 85 degrees Celsius (-40 to 185 degrees Fahrenheit). Its relative humidity is usually between 5% and 95% without condensation and it has a maximum backplane current of 1.1 A. Its output range fluctuates between 0 and 25 mA, and the output impedance of this module is > 1 MΩ while its output overvoltage protection is 140 Volts AC RMS continuous. The Offset Drift of this module is ±1.0 µA/degree Celsius, the Gain drift is ±50 ppm/degree Celsius, and its calibration value is 0.5 mA/22 mA. Its maximum update time is 25 milliseconds and has a ramping value of minimum 0.16 mA per second and maximum 32 mA per second. This module is sensitive to electrostatic discharge, which can cause internal damage and affect normal operation. Follow the guidebook when handling this unit.

Specification：

Frequently asked questions

Q1: What is the 1771-NOC/B used for?

A: The 1771-NOC/B is an analog output module designed PLC systems. It converts digital control signals from the PLC into analog current outputs for controlling field devices and process equipment.

Q2: What is the resolution of the 1771-NOC/B Analog Output Module?

A: The 1771-NOC/B module provides 14-bit high-resolution output, enabling precise control of analog processes and equipment.

Q3: What is the power dissipation of the 1771-NOC/B module?

A: The 1771-NOC/B module dissipates 5.5 Watts at 5 VDC, which should be considered when planning panel ventilation and power requirements.

Q4: What is the operating temperature range of the 1771-NOC/B?

A: The 1771-NOC/B module operates within a temperature range of 0°C to 60°C (32°F to 140°F).

Product Applications

Oil and Gas/Chemical Control Plants: Used in refining and chemical reaction processes to control various proportional control valves, pneumatic diaphragm valves, and flow control devices. 14-bit high resolution protects against drastic pressure and temperature fluctuations.

Metallurgical and Large Steel Plants: In blast furnaces and continuous casting workshops filled with strong electromagnetic interference, its isolated outputs shield noise and stably control hydraulic servo systems and heater current.

Water Treatment and Environmental Protection Plants: Precisely control the speed of dosing pumps, wastewater treatment mixer frequency converters, and the opening of large-diameter water valves.

Coal Power Plants: Used in critical loops requiring high safety, such as boiler feedwater control and damper regulation, where programmable reset safety values ​​(Safe Shutdown) are essential.