@feni865heri @garret-appleton
I hope you’re doing well.
I’d like to clarify the distinction between "Nominal" and "Supported" input voltages to ensure there’s no confusion.
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Nominal Input Voltages: The nominal input voltages for the system are 12 VDC, 24 VDC, and 48 VDC. These are the standard voltage levels at which the system is designed to operate.
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Supported Voltage Range: However, the system is capable of operating within a broader voltage range of 9.6 VDC to 60 VDC, and any voltage within this range is supported.
Why the Difference?
The difference between the "Nominal" and "Supported" voltages stems from the requirements of various industry standards. For example:
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ITE Standards (such as 60950 and 62368) typically require equipment to operate within ±10% of the marked voltage input. Given the system operates between 9.6 VDC and 60 VDC, it can be marked for operation within a range of 11 VDC to 54 VDC for ITE applications.
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For other standards, such as those used in the marine industry, the required tolerance is -20% / +25%. As a result, equipment intended for marine use must be marked with a voltage range of 12 VDC to 48 VDC.
Why the Markings on the Switch
We supply the same switch across multiple markets (e.g., ITE, Marine, Railway, etc.), but there’s limited space on the front panel overlay. To avoid printing multiple voltage ranges for different applications, we follow the most restrictive standard (in this case, -20% / +25%, which applies to marine use), and that is reflected in the voltage markings on the switch.
I hope this clears up any questions. Please feel free to reach out if you need further clarification.
Best regards,
Maziar Sedghisaray
