NOTICE - REDUCE RISK OF FIRE
To reduce the risk of fire:
1. Use only No. 18 AWG or larger power cable for Viper LV units
2. Use only No. 21 AWG or larger power cable for Viper HV units
3. Use only No. 26 AWG or larger telecommunication line cord
Additionally, any cable used for Power over Ethernet must fulfill
requirements specified in IEEE 802.3.
NOTICE - CONNECT EXTERNAL FUSE
The unit has no internal fuse and should be connected via an external fuse
for protection. The fuse must be UL approved and rated for at least 160
VDC / 7.5 A.
NOTICE - ADDITIONAL EMC TYPETESTS
For additional EMC typetests with powering via a CDN or similar high
inductive filters, please contact Westermo for correct test setup.
2.3. Care Recommendations
Follow the care recommendations below to maintain full operation of the unit and to fulfill
the warranty obligations:
• Do not attempt to disassemble the unit. There are not any user serviceable parts inside.
• Do not drop, knock or shake the unit. Rough handling above the specification may cause
damage to internal circuit boards.
• Do not use harsh chemicals, cleaning solvents or strong detergents to clean the unit.
• Do not expose the unit to any kind of liquid (water, beverages, paint etc), unless all
connectors are connected or fitted with protective caps (delivered with the unit),
tightened to the specified torque. Connected cables must have the appropriate ingress
protection code.
• Do not use or store the unit in dusty or dirty areas, unless all connectors and the
ventilation membrane are sufficiently protected.
• Do not cover or bring mechanical force to the ventilation membrane on the back of the
unit.
If the unit is not working properly, contact the place of purchase, nearest Westermo
distributor office or Westermo Tech support.
6
Viper 20A-PoE Series
