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About product :
The TMR Digital Output Module, such as the DO 3401, is designed to provide high reliability and safety in industrial automation systems. Each module features three isolated sets of electronics, or channels, that independently process output data. These channels use the patented Quad Voter circuitry, which ensures that signals are only passed if two out of the three channels (A, B, or C) agree, thereby preventing errors from one failing channel. This voter system enhances redundancy and guarantees a reliable output signal.
The module's Output Voter Diagnostic (OVD) routine periodically checks each point for accuracy, ensuring that the system maintains operational integrity. Additionally, the DO Module is compatible with a hot-spare configuration, which ensures continued operation even if one module fails. The design also includes mechanical keying, preventing incorrect installation in the baseplate.
The DO 3401 module supports outputs with a nominal voltage of 24 VDC, operating within a voltage range of 15 to 30 VDC, and can handle up to 33 VDC in maximum output voltage. The module is built to deliver maximum availability and can operate in a degraded mode if necessary, with field alarms indicating any issues that arise. This redundancy and fault tolerance are crucial for maintaining system reliability in critical industrial applications.
FAQ:
1. What is the purpose of the TMR Digital Output Module?
The DO 3401 module is designed to output digital signals in critical industrial control systems. It features Triple Modular Redundancy (TMR) for high reliability and safety, making it ideal for use in safety-critical applications.
2. How does the Quad Voter circuitry work?
The Quad Voter uses three independent channels that operate in parallel-series paths. It ensures that an output is only activated if at least two out of three channels agree, preventing errors due to channel failure and ensuring signal integrity.
3. What is the voltage range and output capability of the module?
The module operates with a nominal output of 24 VDC and supports an operational voltage range from 15 to 30 VDC, with a maximum voltage of 33 VDC. It is designed to provide reliable output signals to connected loads within these voltage specifications.
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86-18965423501 
86-18965423501
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