RADWAG ZRi02 power supplier - Manual (Page 4)

EXI-02-03-06-14-GB - 4 -
1. RECOMENDATION
Following recommendations of this user manual is essential condition for
ensuring safety when using ZRi02 power supplier.
The user, as well as every single person performing maintenance
operation on the ZRi02 power supplier, should familiarize with this
manual. The manual must be available for reference to any person
operating it.
The manual may be extended with additional warnings and safety
information by RADWAG.
The whole personnel must be informed about any new supplement to
this manual.
2. INTENDED USE
The ZRi02 power supplier, with an intrinsically safe output circuit, is a
device powered up from mains (230V AC) and installed outside the
hazardous area. This supplier is intended for intrinsically safe devices (as
ignition protection), especially those that are used in the 1st or 2nd zone
where there is a mixture of air with vapour, mist or gas of explosive group
II.
The ZRi02 power supplier is used together with other devices and it
can be installed only outside the hazardous area. Intended for indoor
use. Protect against humidity.
3. DESIGN
Power supplier comprises the following subassemblies:
• Main board
• Plastic casing
• Power cord
• Supply cable (up to 20 m) terminated with a plug.
Intrinsic safety of the device are assured by the following solutions:
• Mains transformer with a thermal fuse of the primary winding. It
complies with the PN-EN 60079-11 standard.
• Resistor limiting current
• Zener barrier – a set of Zener diodes limiting the voltage
channelled to intrinsically safe circuit