[Nut-upsuser] Power Shield Defender 1200 - The Story Continues

HILL Walter hill at ieee.org
Sat Mar 7 07:02:13 GMT 2020


Sometime ago [ June 2018 ] I posted a message about getting trying to
get NUT to work with a Power Shield Defender 1200VA UPS. This model
appears in the HCL at https://networkupstools.org/stable-hcl.html

That UPS reported the following when queried using 'lsusb' on an iMac
running macOS [ 10.15 ]

Bus 001 Device 008: ID 0665:5161 Cypress Semiconductor USB to Serial
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.10
  bDeviceClass            0
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0         8
  idVendor           0x0665 Cypress Semiconductor
  idProduct          0x5161 USB to Serial
  bcdDevice            0.02
  iManufacturer           1 INNO TECH
  iProduct                2 USB to Serial
  iSerial                 0
  bNumConfigurations      1

I found that the 'device' was unstable in that it constantly was
'connecting' and 'disconnecting' ultimately causing the NUT UPS
monitoring daemon to give up in disgust. I observed this problem on my
iMac [ macOS ], a PC [ Ubuntu ], a Raspberry Pi [ Raspbian ] and on a PC
running Windows 10. It connected and disconnected every couple of
seconds on all OSs mentioned above.

I recently purchased a replacement 1600VA model are receiving assurances
that the newer model is HID compliant. Sure enough it is and 'lsusb' now

        HID UPS:

          Product ID: 0x5161
          Vendor ID: 0x0665
          Version: 0.02
          Serial Number: HID UPS
          Speed: Up to 12 Mb/s
          Manufacturer: HID UPS
          Location ID: 0x14300000 / 2
          Current Available (mA): 500
          Current Required (mA): 100
          Extra Operating Current (mA): 0

N.B. the Product ID and Vendor ID are unchanged between the two models
despite the fact that they function and operate quite differently.

The main purpose of this email therefore is to warn any Power Shield
Defender users that there are at least two different sub-types available.


 ,-_|\  Walter HILL
/     \	email: hill(at)ieee(dot)org

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