Powering requirements - WM80

WM80 User Guide

Document code
M212995EN
Revision
A
ft:locale
en-US
Product
WM80
Document type
User guide

To ensure electrical safety of the device:

  • Connect the device to an isolated power supply.
  • Protect the device with an overcurrent protection device.
  • Use the specified type of device cable.

For the requirements, see the following tables.

Power supply
Property Description
DC output, nominal 24 V DC
Insulation Double/Reinforced insulation

The device requires an external overcurrent protection device. Protect the device and the cabling with a circuit breaker at operating voltage lines that has the following characteristics. The overcurrent protection device can be a fuse or a circuit breaker.

Overcurrent protection device
Property Description
Current rating 13 A, with type B, C, or D tripping characteristics (according to IEC/EN 60898-1 or UL 1077)
Minimum voltage rating 32 V DC

Circuit breaker

Instead of a circuit breaker you can use a cartridge fuse with class T (slow acting) tripping characteristics.

2-pole (connected on both V+ and V–) or 1-pole (connected on V+)

Vaisala recommends that you use a cable provided for Vaisala. If you use some other cable, the cable must fulfill the following requirements.

Cable
Property Description
Maximum cable length 19 m (62 ft)
Appliance Warning Material (AWM) style 20236 External interconnection or internal wiring
Shield Mandatory
Minimum wire thickness 4 (data) × (2 x 0.34 mm2) + 4 (operating voltage) × 0.5 mm2
Connector type S22KHC-P10NJH0-900S manufactured by ODU