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Description：

The 1771-NIS/B Analog Input Module is a high-precision current input module designed for industrial PLC and process control applications. It provides eight isolated current input channels supporting standard 4–20 mA signals, with a 16-bit unipolar resolution of 330 nA per bit for accurate signal acquisition and monitoring. The module accepts loop-powered inputs with a 20–30 VDC supply for 0–20 mA applications and supports both BCD and Natural Binary data formats, enabling flexible integration with a wide range of control systems.

Specification：

Frequently asked questions

Q1: What is the 1771-NIS/B Analog Input Module used for?

A1: The 1771-NIS/B Analog Input Module is designed to receive and process analog current signals from field devices such as transmitters and sensors. It enables accurate monitoring of process variables in PLC-based industrial systems.

Q2: How many input channels does the 1771-NIS/B provide?

A2: The 1771-NIS/B module features 8 analog input channels, allowing multiple field devices to be monitored simultaneously.

Q3: What input signal range does the 1771-NIS/B module support?

A3: The 1771-NIS/B supports the industry-standard 4–20 mA analog current input range, making it compatible with a wide variety of industrial transmitters.

Q4: What is the 1771-NIS/B backplane current requirement?

A4: The 1771-NIS/B module requires 2.9 A of backplane current, which should be considered when determining the power capacity of the PLC chassis.

Q5: What is the power dissipation of the 1771-NIS/B module?

A5: The 1771-NIS/B has a power dissipation of 12 W, supporting stable operation under normal industrial conditions.

Product Applications

Oil and Gas: Used for oil and gas field development and long-distance pipeline monitoring, collecting key process parameters such as wellhead pressure and flow rate.

Petrochemicals and Chemistry: Monitors temperature changes and liquid levels in reaction equipment, distillation towers, and other processes to ensure production safety.

Power and Energy: Used for monitoring generator auxiliary equipment and power grid substation status.

Metallurgy and Water Treatment: Provides signal acquisition from various sensors (such as gas, turbidity, and flow transmitters) in harsh industrial environments, with resistance to strong electromagnetic interference.