01-16-2025 03:37 AM
Hi everyone,
I'm experiencing an issue with multiple IE-3300-8T2S-E network switches installed with PWR-IE65W-PC-AC power supplies. On several occasions, these power supply modules have suddenly blacked out and stopped working, despite a stable 240VAC input from our fixed plant supply.
I've noticed that the output voltage of the power supply is 54VDC, which is higher than the input voltage marked on the Cisco switch (48VDC). This discrepancy concerns me.
Has anyone else encountered similar problems with this combination of switch and power supply? Are these two components fully compatible? Could there be another power supply module that's recommended for the IE-3300?
Any insights or suggestions would be greatly appreciated!
Thanks in advance for your help.
@cisco_support @IndustrialNetworking @Switching
01-16-2025 04:17 AM - edited 01-16-2025 09:36 PM
@garret-appleton wrote:Hi everyone,
I'm experiencing an issue with multiple IE-3300-8T2S-E network switches installed with PWR-IE65W-PC-AC power supplies. On several occasions, these power supply modules have suddenly blacked out and stopped working, despite a stable 240VAC input from our fixed plant supply.
I've noticed that the output voltage of the power supply is 54VDC, which is higher than the input voltage marked on the Cisco switch (48VDC). This discrepancy concerns me. MyFordBenefits Login
Has anyone else encountered similar problems with this combination of switch and power supply? Are these two components fully compatible? Could there be another power supply module that's recommended for the IE-3300?
Any insights or suggestions would be greatly appreciated!
Thanks in advance for your help.
@cisco_support@IndustrialNetworking @Switching
Hello,
Can u pls provide more detail so i can suggest and help you.
Best Regards
01-16-2025 10:15 PM
01-16-2025 11:30 AM
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.
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.
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.
The difference between the "Nominal" and "Supported" voltages stems from the requirements of various industry standards. For example:
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.
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.
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
01-17-2025 05:13 AM
Hi Maziar,
Thanks for the thorough response.
That's clarifies the voltage thresholds for the power supply and the Cisco switch. The power supply is set at 54VDC and though the Cisco switch is marked at 48VDC (nominal) it has a supported range uptoo 60VDC. Is it fair to suggest the Cisco switch and power supply are compatible?? Is there another power supply that should be used with IE-3300 switch??
Have you seen any issues where power supply's black out intermittently?? There is another thread that has same issue, but no conclusion has been found regarding this matter.
Thank you
01-17-2025 11:16 AM
Its fair to say the IE3300 and 65W PSU are compatible. See table 8 of IE3300 datasheet to see supported input DC voltage range. 9.6VDC - 60VDC
can you provide details on the 65W Power Supply Unit (PSU)? serial number? Version ID?
it might be easier to attach a photo of the details on the compliance sticker of one or two of the 65W PSUs writing the info is hard. it can be hard to find and interpret from the label.
01-17-2025 05:24 PM
Hi Albert,
Thanks for your reply.
Please see attached photos of power supply and network switch data plates.
This appears to be a common issue with the power supply's so it would be great to get it resolved.
https://community.cisco.com/t5/switching/pwr-ie65w-pc-ac/td-p/4846386
Thanks in advance.
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