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The Model 3721 is a versatile switching module featuring two independent banks of 1×20 two-pole multiplexers, making it ideal for general-purpose switching tasks, including temperature measurements. Each bank can automatically connect to the Series 3700A mainframe’s backplane, allowing it to interface with optional digital multimeters (DMMs) through the analog backplane connection relays. This configuration enables the Model 3721 to function as a single 1×40 two-pole multiplexer, or it can support card-to-card expansion for larger configurations.

In addition to its 40 two-pole or 20 four-pole channels, the Model 3721 includes two dedicated channels specifically for current measurements with a 3A capacity. It also supports 4-wire common-side ohms input, providing up to 40 channels for four-wire resistance measurements, which enhances its functionality for various applications requiring precise and flexible measurement configurations.

Triconex 3721 Analog Input Module FAQ:
Q1: What is the primary function of the Triconex 3721 Analog Input Module?
The Triconex 3721 Analog Input Module is designed for reliable and precise analog data acquisition in safety-critical industrial applications. It reads analog signals from field devices and converts them into digital values, which are then processed by the Triconex system to monitor and control plant operations effectively.

Q2: How many input channels does the Triconex 3721 module support?
The 3721 module typically supports multiple input channels, with the exact number depending on system requirements and configuration. This multi-channel capability enables users to connect numerous field devices to a single module for efficient monitoring.

Q3: Is the Triconex 3721 module designed for high-reliability environments?
Yes, the 3721 module is designed for high-reliability environments, particularly in industries requiring strict safety standards, like oil and gas, power generation, and chemical processing. It includes redundant components and failsafe features that help maintain continuous operation in the event of a hardware failure.

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