q-Tech WP2P Digital & Analogue User manual

WP2P Digital
User Guide
WP2P Digital
Version 1.7

WP2P Digital– User Guide © 2020 QTech Data Systems Ltd 2
Contents
Contents .......................................................................................................................... 2
About This User Guide ...................................................................................................... 4
Product overview ............................................................................................................. 4
Features ......................................................................................................................................................4
Hardware ....................................................................................................................................................5
Digital I/O ....................................................................................................................................................5
Output Relays ..............................................................................................................................................5
Switched Inputs ...........................................................................................................................................6
WP2P Repeater Module ..............................................................................................................................6
Preparing for Installation .................................................................................................. 7
Installation Notes ............................................................................................................. 7
Mounting .....................................................................................................................................................7
Antenna .......................................................................................................................................................7
Power Supply Notes ....................................................................................................................................8
Power Supply ................................................................................................................................................. 8
Internal Fuse .................................................................................................................................................. 8
Current Consumption & Standby Battery Capacity ....................................................................................... 8
Adjustments & Settings ...............................................................................................................................8
HOLD switch: Output Relay Configuration ..................................................................................................... 8
REPT switch: Repeater Configuration ............................................................................................................ 8
Radio Address (RA) ......................................................................................................................................9
Using Multiple WP2P Systems in the same area ..........................................................................................9
Operation Notes ............................................................................................................. 10
How do the modules communicate? ......................................................................................................... 10
STAT Indicator ........................................................................................................................................... 10
Link Status Indicator .................................................................................................................................. 10
MODE Pushbutton Switch ......................................................................................................................... 10
Technical Specifications .................................................................................................. 11
Warranty ........................................................................................................................ 12
Additional Information and Support ............................................................................... 12

WP2P Digital– User Guide © 2020 QTech Data Systems Ltd 3
Copyright 2020
QTech Data Systems Limited
Christchurch, New Zealand
All rights reserved.
The circuit details, software algorithms and know how disclosed in this document are proprietary to
QTech Data Systems Limited and shall remain the intellectual property of
QTech Data Systems Limited.
DISCLAIMER
The information in this document is subject to change without notice and does not represent a
commitment on any part of QTech Data Systems Limited. While the information contained herein is
assumed to be accurate, QTech Data Systems Limited assumes no responsibility
for any errors or omissions.
Contact QTech
QTech Data Systems Limited
12 Midas Place, Middleton
Christchurch 8024
New Zealand
Phone: [phone]
Fax: [phone]
Email: [email protected]z
Web: www.qtech.co.nz
Revision Details
1.1
February 2015
First Edition
1.2 May 2015 Minor error corrections
1.3 September 2019 Quick Start Guide updated to User Manual.
First issue to support Rev E hardware.
1.4 January 2020 Minor error corrections
1.5
March 2020
Addition of product codes in Technical Specification
1.6 August 2020 Update of product code
1.7 August 2020 Update current consumption & standby battery capacity notes

WP2P Digital– User Guide © 2020 QTech Data Systems Ltd 4
About This User Guide
This document provides assistance with the installation and operation of the QTech Wireless Point to Point
system. Included in this document is:
 How to install the WP2P modules
 WP2P and repeater operation
 Device Configuration
 Device Specifications
Other documents that should be read in conjunction with this document include:
 Installation Guide for the RSS01 solar charging environmental enclosure
Contact QTech for application notes, which can be obtained to provide guidance for specific configuration
scenarios, detailing the configuration workflow steps.
Product overview
Wireless Point to Point (WP2P) modules can be used to link electrical devices together in situations where the
physical separation or terrain between them would make direct wiring uneconomic or impractical.
The most basic WP2P system comprises two WP2P modules which have been configured as a pair. The modules
simply use their onboard radios to communicate their input state to the other module.
Each WP2P Low Power – DIGITAL module has three switch inputs and three relay outputs.
Features
 3 digital inputs
 3 digital outputs
 900 MHz (FSK modulation) short range radio up to approximately 400m for local network
communications. Extensible up to 4000m with high gain antenna configurations.
 Supports use of a single repeater for difficult terrain or range extension
 USB interface for diagnostics and firmware upgrades
 Solar power charging and battery operation (when supplied with QTech RSS01 Remote Solar Station
enclosure).
 Firmware is field upgradeable

WP2P Digital– User Guide © 2020 QTech Data Systems Ltd 5
Hardware
Feature Function
A Power input (nominally 12V DC)
B
USB
t
ype Mini B
for
configuration
and
f
irmware upgrade
s
C RF connector SMA
D I/O pairs (signal/ground)
- RLY1, RLY2, RLY3 relay contacts
- INP1, INP2, INP3 digital inputs
E Mode pushbutton
F LINK indicator LED (device link communications state)
G
STAT
i
ndicator
LED
(device status and power on indicator)
Digital I/O
The WP2P modules operate by copying the state of each switch input to the corresponding relay output on the
other WP2P module. When a switch input is closed, the relay output on the other module will close, and when
the switch is released, the relay will open again.
WP2P Module 1
Close switch contact on “INP1”
WP2P Module 2
“RLY1” closes operating light
The delay between an input activating and the corresponding output activating is normally less than 1 second
(see note at end).
Output Relays
The output state of each WP2P, on loss of communication between the pair, can be configured to either remain
in their previous state or to default to the open state (refer to Adjustments and Settings below).
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.
A
B
C
D
E
F
G

WP2P Digital– User Guide © 2020 QTech Data Systems Ltd 6
Switched Inputs
The inputs (Labelled INP1 INp2 and INP3) 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.
WP2P Repeater Module
A WP2P Repeater Module is available to increase the range and coverage of a WP2P system. It is used in
situations where the WP2P modules are a long way apart or there is an obstacle preventing line-of-sight between
them.
The WP2P Repeater Module operates by listening for complete and valid WP2P messages and then re-
transmitting them. It can be used with both WP2P Digital and WP2P Digital & Analogue type modules
simultaneously.
Please refer to the WP2P Repeater User Manual for further details.

WP2P Digital– User Guide © 2020 QTech Data Systems Ltd 7
Preparing for Installation
Line of site communications is necessary for optimum operation of the WP2P Digital & Analogue System. When
planning the installation consider the following and contact QTech for advice if necessary:
a) Consider using high gain antennas supplied by QTech for extended communications range and if
communication is unreliable due to weak signal strength.
b) Consider undertaking a field radio survey to ascertain antenna requirements and identify potential
radio channel interference by neighbouring transmitters.
c) If the device is to be mounted outdoors please use an environmentally protected enclosure.
d) Antenna elevation is important to obtain best performance. Ensure antennas are mounted in free
space, unobstructed by solid objects.
e) Consider the use of a QTech WP2P Repeater if the terrain does not permit clear line of sight.
f) Ensure the device is operating the latest firmware especially if the device has been in storage for some
time. If in doubt, contact QTech for advice.
g) Ensure that the power supply meets the correct specifications detailed herein.
Installation Notes
To comply with the New Zealand and Australian wiring regulations the WP2P cannot be connected to any
external Voltages exceeding 32 Volts AC or DC. To connect to or control higher Voltage equipment please consult
a Registered Electrician.
Mounting
For indoor mounting, the device should be mounted onto a flat surface using the Qty 4x M4 fixing holes at
~102mm x 50mm centres. Where the device is to be operated outside or in other adverse site conditions, then,
the device should be housed in an appropriate plastic enclosure.
For outdoor mounting, use the RSS01 solar charging environmental enclosure and follow the installation guide
for those products. Alternatively use a minimum of IP65 rated enclosure to suit the device and any additional
equipment to be housed, ensuring that all cables are glanded.
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.
Avoid mounting in locations that may be subject to shock or vibration or temperature extremes.
Antenna
The device is a low power device that is designed specifically for operation in New Zealand and Australia. Each
unit 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 QTech for details and advice.
For best performance mount the antenna up high and away from large objects.
Warning – Do not operate the device 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 device.
Never operate the devices in violation of RSM conditions. AS/NZS 4268:2008 specifies a
maximum EIRP of 1 watt.

WP2P Digital– User Guide © 2020 QTech Data Systems Ltd 8
Power Supply Notes
Power Supply
The WP2P can operate from a DC power supply of 6 – 24 Volts. The power connector is a 2.1mm DC Socket,
centre pin positive. The supply Voltage should be clean, continuous and transient free with an output of 6 - 24
Volts DC. The WP2P incorporates reverse and over Voltage protection.
Warning – Do NOT use Switch Mode Power Supplies (SMPS) with this product. The
DC power supply used for this product MUST have a grounded negative or be a “linear”
transformer-based plug pack. The reason is that the aerial, programming port and
external connections can provide exposed earth points and the SMPS can impose an AC
voltage on the DC ground, which can lead to damage. Suitable cost-effective plug packs
are available from QTech P/N PD5412, PD5413 & PD5414.
The WP2P is over Voltage protected to 30 Volt. Voltages greater than 28 Volts DC will blow the internal 500mA
fast blow fuse. Any solar/battery design needs to take this into account.
Internal Fuse
The device is protected by a 20mm x 5mm 500mA fast blow fuse. This is located on the internal circuit board.
To access the fuse, remove the top cover by carefully prizing it off its retaining dimples. Only replace the fuse
with an identical type, do not use alternatives. This fuse will blow if the power supply maximum voltage is
exceeded.
Current Consumption & Standby Battery Capacity
Solar systems utilising a solar charged battery backup facility are provided by the RSS01 or RSS02 product. For
systems where a custom solution is sought then the power consumption of the device can be used to calculate
the required standby battery capacity.
Average current consumption is ~6mA, which can be used as a guideline to assist with standby battery capacity
calculations.
Adjustments & Settings
There are two DIP switches labelled “OPTION” that allow configuration options for each WP2P to be set.
HOLD switch: Output Relay Configuration
 “ON” The outputs will retain (HOLD) their current state if the communication link between the WP2P
pair is lost.
 “OFF” The outputs will return to the open (OFF) state after 30seconds if the communication link
between the WP2P pair is lost.
Once the communication link is re-established the outputs will update to reflect the current input states of the
other module.
REPT switch: Repeater Configuration
 “ON” The WP2P is to be used with a repeater.
 “OFF” The WP2P is to be used without a repeater.

WP2P Digital– User Guide © 2020 QTech Data Systems Ltd 9
Note - Ensure that both W2P modules in a pair must be configured to have the same
REPT switch setting.
Radio Address (RA)
All WP2P systems have a unique Radio Address which is programmed into WP2P modules during manufacture
as security measure to prevent unauthorised access. The Radio Address is printed on the WP2P case represented
in the following format “192.168.0.0”.
Note - All WP2P modules in a given system must have the same first three numbers
in their Radio Address. The 4th number must be a sequential pair starting from the even
number e.g. 0.1.1.40 & 0.1.1.41.
The Radio Address must be stated for purchasing for WP2P module replacement.
Using Multiple WP2P Systems in the same area
There are ten individual frequency bands referred to as Channel Numbers allowing up to ten WP2P systems to
be used in the same area. The Channel Number is identified by the “#” on the packaging label; this example is
“Channel #1”.
Warning – Do not use the same channel for adjacent systems. For example, if you
currently use “#1” ensure that the adjacent system is “#3” etc.

WP2P Digital– User Guide © 2020 QTech Data Systems Ltd 10
Operation Notes
How do the modules communicate?
The WP2P modules use an event driven approach to communications. When the WP2P modules detect a change
of their input state, they will immediately transmit a message to the other module. There is however, a very
small chance that another radio device on that channel wanted to send a message at exactly the same time. This
will result in a “collision”, but the WP2P modules can detect this and use a collision avoidance scheme to
retransmit their messages.
STAT Indicator
The “STAT Indicator” indicates the current operational status of the device. It provides a heartbeat indication
that the device is operating ok or it displays a coded error indication for faults.
Faults may be latched so that the device remains indicating an error condition even if the fault has been
removed. In this way the device can be reviewed at a later time to show that a problem had occurred.
Pressing the mode switch briefly will clear the error condition indication on the STAT LED. If the fault is still
present then the STAT LED will redisplay the error condition.
Code Meaning
1 short flash, 2s interval Normal operating mode, Processor running, no active errors
2 short flashes, 2s interval Unspecified intermittent communications fault. A communications failure as
occurred recently.
~4 Short flashes on power up Indicates the device booting after power up or watchdog reset. LED should
usually then display normal operating mode indication.
Link Status Indicator
WP2P modules have a Link Status LED which is located next to the power connector.
This is to assist with site diagnostics and checking by indicating the state of the communications link between
pairs of WP2P modules.
The Link light functions as follows:
 OFF – Module failure, no power, fuse blown, circuit failure, etc.
 SLOW FLASH – Module functioning but no communication with its partner module.
 ON – Healthy wireless communications. The LED will briefly flicker each time it receives messages from
the other WP2P module.
Link Status indicator is based on the “keep-alive” message the WP2P modules send if it has been longer than 30
seconds since they last sent a message. Therefore, if one of the modules is turned off, it will take no longer than
30 seconds for the other module to detect that the link is down and begin flashing the Link Status LED. If the
connected I/O is changing more frequently than once every 30 seconds, then they don’t need to send keep-alive
messages.
MODE Pushbutton Switch
Pressing the mode pushbutton will clear the error condition indication on the STAT LED. If the fault is still present
then the STAT LED will redisplay the error condition.

WP2P Digital– User Guide © 2020 QTech Data Systems Ltd 11
Technical Specifications
Note. Specifications are subject to change without notice.
Item Parameter
Specification
General
Product Code PD8810E-WP2P (pair of matched modules)
Product Code
PD8810E (single module)
Dimensions
11
2
x 7
5
x 25 mm
Mounting holes 4 x M4
Weight
250 gm
Temperature
Operating: 0
-
70
degrees C
Storage 0-70 degrees C
Humidity
0
-
90% non
-
condensing
Ingress
Protection
IP20
Water contact should be avoided.
Power
Input voltage:
6
–
24V DC (Max 28V DC)
Current: 6mA average
Internal 500mA fast blow fuse
I/O WP2P Digital 3 x digital inputs, electrically isolated with internal pull-up resistor
3 x relay outputs, normally open, 2A max
Indicators STAT – operational status and power
LINK – communications link activity
Pushbutton Operating Mode switch
Radio Regulatory ISM band, AS/NZS 4268
Antenna
Detachable SMA
Operating
Frequency
915 – 928 MHz
Output power
20 dBm max.
→
100mW
Modulation GFSK
Communications
USB
USB 2.00,
t
ype Mini
-
B connector Interface
(configuration and firmware upgrades)

WP2P Digital– User Guide © 2020 QTech Data Systems Ltd 12
Warranty
The hardware and software for this product is covered by the QTech Limited Warranty Agreement and software
End User License Agreement, respectively.
Please refer to the QTech Limited Product Warranty Agreement, which may be downloaded from the QTech
website: www.qtech.co.nz
QTech Data Systems Limited does not warrant the suitability of this product for any particular application as the
conditions in which it is used are beyond our control. This is not withstanding warranty of merchantability.
Additional Information and Support
If you have problems try the following:
 Visit the QTech web site for application notes and guides
 Refer to the troubleshooting section if one is present in this document
 Contact the support desk at [e-mail]
 Phone the support desk, contact details at beginning of this document
Copyright 2020 QTech Data Systems Limited, all rights reserved.