The value of tmnxHwPowerZone indicates the managed power-zone on an SROS series system that this device resides. Devices on differing power-zones are managed separately. That is, if power is restricted on one power-zone, higher priority devices may be forcefully powered off, while a power-zone without a power restriction may have low-priority devices boot up. This object maps the corresponding device with a row in the tmnxChassisPowerMgmtTable. A value of zero (0) indicates that this device does not use system power resources and thus does not reside in a power-zone.