Environmentally hardened ethernet switch
AssigneeRuggedcom Inc.
InventorMarzio Paride Pozzuoli
Life of this patent
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Abstract
A device for hardening an Ethernet switch is disclosed. The device provides cooling for the switch, and, suppresses electrical transients and electromagnetic interference, which could affect the power supply, and data transmission of the Ethernet switch. Using this device, the Ethernet switch can be used in harsh industrial environments, such as those present in power utility substations.
Claims20
A power supply circuit to supply power to internal components of a device, said power supply circuit comprising:
- a power block for converting received power from an external power source to a voltage to be used by the internal components of the device, said power block comprising:
- an external power connector having a positive power line, a negative power line and an earth ground, said external power connector receiving power from the external power source;
- at least three uni-directional solid state transient voltage suppressors each of which is connected in parallel with a corresponding one of at least three metal oxide varistors and a corresponding one of at least three capacitors, said uni-directional transient voltage suppressors and varistors clamping both differential and common mode high voltage transients to acceptable levels for the internal components of the device by clamping the positive power line to the earth ground, by clamping the negative power line to the earth ground and by clamping the positive power line to the negative power line.
A power block for converting received power from an external power source to a voltage to be used in the internal components of a device, the power block comprising:
- an external power connector having a positive power line, a negative power line and an earth ground, said external power connector receiving power from the external power source;
- at least three uni-directional solid state transient voltage suppressors each of which is connected in parallel with a corresponding one of at least three metal oxide varistors and a corresponding one of at least three capacitors, said uni-directional transient voltage suppressors and varistors clamping both differential and common mode high voltage transients to acceptable levels for the internal components of the device by clamping the positive power line to the earth ground, by clamping the negative power line to the earth ground and by clamping the positive power line to the negative power line.
A power block for converting received power from an external power source to a voltage to be used in the internal components of a device, the power block comprising:
- an external power connector having a positive power line, a negative power line and an earth ground, said external power connector receiving power from the external power source;
- a first set of a first uni-directional solid state transient voltage suppressor, a first metal oxide varistor and a first capacitor for clamping differential transients to acceptable levels for the internal components by clamping the positive power line to the negative power line;
- a second set of a second uni-directional solid state transient voltage suppressor, a second metal oxide varistor and a second capacitor for clamping common mode transients to acceptable levels for the internal components of the device by clamping the positive line to the earth ground;
- a third set of a third uni-directional solid state transient voltage suppressor, a third metal oxide varistor and a third capacitor for clamping common mode transients to acceptable levels for the internal components of the device by clamping the negative line to the earth ground.
Dependencies are inferred from the claim text.