Precision Analog Control for SLC 500 Systems
When engineers need reliable current output for modulating instruments, the Allen-Bradley 1746-NO4I offers a proven solution within the SLC 500 platform. This analog output module delivers four channels with a 0 to +20 mA range, making it suitable for driving valves, actuators, and signal converters in process control environments.
Key Technical Specifications of the 1746-NO4I
The 1746-NO4I draws 55 milliamps from the 5-volt backplane and 195 milliamps from the 24-volt DC supply. Its output range spans 0 to +20 mA, with a full-scale output of 21 mA and an overrange capability of 5 percent. The module provides 14-bit resolution and a step response of 2.5 milliseconds, ensuring accurate and responsive control.
Update time for all channels in parallel is 512 microseconds, and the current output coding ranges from 0 to +32764. The ambient operating temperature is 0 to 60 degrees Celsius, supporting typical industrial environments.
Application Scenarios for the 1746-NO4I
In a chemical processing plant, the 1746-NO4I can drive a modulating valve to regulate flow based on a PID controller output. The module's four independent channels allow simultaneous control of multiple loops, reducing hardware costs and panel space.
For water treatment facilities, the analog output module can transmit a 4-20 mA signal to a variable frequency drive for pump speed control. The 14-bit resolution ensures fine adjustments, improving process efficiency and reducing energy consumption.
Compatibility and Integration with SLC 500
The 1746-NO4I is designed for use with SLC 500 fixed or modular hardware. It installs into a 1746 chassis and communicates over the backplane, requiring no additional wiring for data exchange. The module includes an embedded selector switch for choosing internal or external power supply, with external supply rated at 24 volts DC plus or minus 10 percent at 195 milliamps maximum.
Frequently Asked Questions About the 1746-NO4I
What is the output range of the 1746-NO4I?
The module provides a current output range of 0 to +20 mA, with a full-scale output of 21 mA and overrange capability of 5 percent.
How many channels does the 1746-NO4I have?
It has four current output channels, each capable of the same 0 to +20 mA range.
What is the resolution of the 1746-NO4I?
The module offers 14-bit resolution, which supports precise analog control for demanding applications.
What is the update time for the 1746-NO4I?
The update time is 512 microseconds for all channels operating in parallel.
What is the operating temperature range for the 1746-NO4I?
The ambient operating temperature is 0 to 60 degrees Celsius.
Why Choose Petro Auto Tech for the 1746-NO4I
Petro Auto Tech provides genuine Allen-Bradley automation components with reliable sourcing and fast delivery. Our team understands the technical requirements of industrial systems and can help you select the right module for your application. Contact us for current availability and lifecycle status.
