User manual

WI-GTWY-9-xxx Wireless Gateway V1.18

12 – 24 volts AC RMS or 9 – 30 volts DC at the “supply” terminals, or

10.8 –15 volts DC at the “battery” terminals.

The power supply should be rated at 1.5 Amps and be CSA Certified Class 2. For use in Class 1

Div 2 explosive areas (USA/Canada), the power supply must be approved for Class 1 Div 2 use.

Note: Connect module to the same ground/earth point as the antenna mounting to avoid

differences in earth potential during voltage surges. The modules need an earth connection for

the internal surge protection to be effective.

For licensed 105U units with RF power above 2W, the unit needs to be powered from

the 12V “Battery” terminals with a power supply of at least 2A rating. Alternately, the

unit can be powered via the SUP1 / SUP2 terminals, provided a backup battery is

connected to the “Battery” terminals to supply the inrush current for the radio transmitter.

This is not required for units with radio power less than 2W.

3.3.1 AC Supply

The AC supply is connected to the “SUP1” and “SUP2” terminals as shown below. The AC

supply should be “floating” relative to earth.

3.3.2 DC Supply

For DC supplies, the positive lead is connected to “SUP1” and the negative to “GND”. The

positive side of the supply must not be connected to earth. The DC supply may be a floating

supply or negatively grounded.

SUP1

SUP2

GND

BAT+

12 – 24 VAC

Power

Supply

AC Out

- +

WI-GTWY

xxx

Optional Battery

Fuse 5A

GND