QTech Data Systems Wireless Point to Point (WP2P) - Digital & Analogue I__O - Manual (Page 5)

Wireless Point to Point - DIGITAL & ANALOGUE - Quick Start Guide – v1.1 – June 2013 5
www.qtech.co.nz Tel: 03 3663713
Over Voltage Protection
The WP2P module is over voltage protected by a 13 volt Zener Diode ‘crow bar’ that will
conduct and blow the internal fuse for voltages >14 volts. The WP2P will tolerate 13.8 volts,
but will begin to draw excessive current and blow the fuse at input voltages >14.6V.
Note – Solar Supplies and design considerations
Before using any WP2P module in a solar powered system please check our “Solar
Application Note” on our website. Explicit consideration must be given to the
maximum voltage and voltage regulation to prevent damage.
Installation and Operation Notes
Output Relays
The output relays (Labelled RLY1 and RLY2) are normally open contacts that are rated at
maximum of 2 Amps. The relays are internally protected by solid state snubbers for operating
with inductive loads.
Warning – Do not directly connect to 220V AC voltage. The New Zealand and
Australian wiring regulations require that any wiring in excess of 32 volts must be
carried out, or be certified by a registered electrician. Consult your local electrical
installer for further guidance.
Switched Inputs
The inputs (Labelled INP1 and INP2) are electrically isolated, normally open inputs. They are
connected to suitable mechanical switches, contacts and other closure devices. An input is
active or ON when the input switch is closed and inactive or OFF when the input switch is
open.
Warning – Only mechanical switches or mechanical closure devices should be
connected to the inputs. No external voltage or other electrical source is to be
connected to the inputs.
Antenna
The WP2P is a low power device that is designed specifically for operation in New Zealand
and Australia. Each WP2P is supplied with a stub antenna that will provide an operating
range of 50 to 350 meters, dependent upon terrain and obstacles such as trees and buildings.
All radio systems work most reliably when the path between the radios is clear “line of sight”.
This needs to be considered when planning longer range systems.
Optional higher gain, long range antennas are available. Please contact your equipment
supplier for details and advice.
Warning – Do not operate the WP2P without an antenna attached. Do not
substitute antennas; use only those antennas recommended by your equipment
supplier. Failing to comply with these requirements can damage the WP2P.
Never operate the devices in violation of RSM conditions. AS/NZS 4268:2008 specifies
a maximum EIRP of 1 watt.
Mounting
The WP2P should be mounted onto a flat surface using the Qty 4x M4 fixing holes at
~102mm x 50mm centres. Where the WP2P is to be operated outside or in other adverse site
conditions, then, the WP2P should be housed in an appropriate plastic enclosure.
Note – If the WP2P is to be enclosed in a metal cabinet then an optional external
antenna will be needed. Please contact your equipment supplier for alternative
antenna details and advice.
Adjustments & Settings
There are no user settings or adjustments required.