PLC 1771-NOC/B Analog Output Module

Frequently asked questions
Q:What industries commonly use the 1771-NOC/B?
A:The module is used in manufacturing, process automation, water and wastewater treatment, power generation, chemical processing, and other industrial control applications that require analog output control.

Q:How is the 1771-NOC/B configured?
A:The module is configured through the PLC-5 programming software, where output scaling and operating parameters are defined according to the application requirements.

Q:How many output channels does the module provide?
A:The 1771-NOC/B provides four independent analog output channels, allowing multiple field devices to be controlled from a single module.

Description

The PLC Module 1771-NOC/B is an Analog Output Module designed for use with the PLC-5® programmable controller system. It provides analog output capability for converting digital values from the controller into proportional analog signals used for controlling field devices in industrial automation applications. The 1771-NOC/B module provides four isolated analog output channels, supporting voltage and current output configurations for connection to compatible analog devices. Each channel operates independently and allows the PLC-5 system to interface with field equipment that requires variable analog signals, such as control valves, drives, and other process control devices. The module is installed in a standard 1771 I/O chassis and communicates with the PLC processor through the I/O backplane. The module is configured through PLC-5 programming software and allows users to define output data scaling according to application requirements. Its isolated channel design helps reduce interference between output signals and provides flexibility when connecting multiple analog devices within a control system. The 1771-NOC/B is used in industrial control applications where PLC-5 systems require analog signal output for process regulation, machine control, and automation tasks. It provides a direct interface between the PLC-5 controller and analog field equipment, supporting accurate output control within existing PLC Module 1771 I/O installations.

Parameter

Model: 1771-NOC/B Analog Output Module
Update Rate: 2.5 ms for all 4 channels
Current Output Range: 4 to 20 mA DC
Voltage Output Range: ±10V DC, 0 to 10V DC, 1 to 5V DC
Certifications & Approvals: CE, UL listed, CSA approved
Operating Temperature: 0 °C to 60 °C (32 °F to 140 °F)
Relative Humidity5% to 95% RH (Non-condensing)

Application areas

• Industrial Burner Fuel-Air Ratioing: Manages the exact execution loop of analog modulating dampers and actuators inside utility boilers and process heaters.
• Hydraulic and Pneumatic Proportional Valve Drive: Regulates variable pressure and oil flow loops in automated industrial stamping presses and clamping units.
• Strip Tension Control in Web Handling: Commands the torque reference loops of electric unwind/rewind brakes on paper, steel, or textile rolling mills.
• Chemical Dosing and Metering Pump Regulation: Directs variable current inputs to chemical injection strokes for municipal water treatment or reactor blending.

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