1326AB-B515E-21 A-B Termination Unit
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The 825-P firmware can be upgraded in the field; refer to Chapter 13: Firmware Upgrade Instructions. You know when a self-test failure has occurred by monitoring the front-panel messages. By using the metering functions, you know if the analog front-end (not monitored by relay self-test) is functional. Refer to Chapter 11: Testing and Troubleshooting for detailed testing and troubleshooting information. The only two components that can be replaced in the field are the power supply fuse and the real-time clock battery. A lithium battery powers the clock (date and time) if the external power source is lost or removed. The battery retains the thermal memory for the thermal overload function when the power source is lost or removed. The battery is a 3V lithium coin cell, Rayovac® BR2335 or equivalent. At room temperature (25°C), the battery operates nominally for ten years at rated load. When the relay is powered from an external source, the battery experiences a low self-discharge rate. Thus, battery life can extend well beyond ten years. The battery cannot be recharged.
In normal operation, the relay ENABLE LED is illuminated and the LCD display screen is on. The LCD screen rotates displays showing each screen for about two seconds before moving to the next. The default rotating display screens include Unit ID Line 1, Unit ID Line 2, line currents, and voltages (if available). Enable the relay to add display messages as noted in the Display Enable settings in Table 41.
The structure and details of the product：
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