Q-Tech WP2P Digital & Analogue Manual de usuario

WP2P Digital & Analogue

User Guide

WP2P Digital & Analogue

Version 1.3

 
WP2P Digital & Analogue–User Guide © 2019 QTech Data System Ltd. 
2 
 
Contents 
About This User Guide......................................................................................................4 
Product overview .............................................................................................................4 
Hardware ....................................................................................................................................................4
Features ......................................................................................................................................................5
Digital I/O....................................................................................................................................................5
Analogue I/O ...............................................................................................................................................5
Output Relays..............................................................................................................................................6
Switched Inputs...........................................................................................................................................6
WP2P Repeater Module ..............................................................................................................................6
Preparing for Installation..................................................................................................7 
Installation.......................................................................................................................7 
Mounting.....................................................................................................................................................7
Antenna.......................................................................................................................................................7
Input and Output Wiring .............................................................................................................................8
Jumper Settings...........................................................................................................................................8
Power Supply Notes ....................................................................................................................................9
Power Supply & Current Consumption..........................................................................................................9 
Internal Fuse ..................................................................................................................................................9 
Over Voltage Protection ................................................................................................................................9 
Radio Address (RA)......................................................................................................................................9
Using Multiple WP2P Systems in the same area ........................................................................................10 
Operation.......................................................................................................................11 
Operational notes –How do the modules communicate? .........................................................................11 
STAT Indicator ...........................................................................................................................................11 
LINK Status Indicator .................................................................................................................................11 
MODE Pushbutton Switch .........................................................................................................................12 
Technical Specifications.................................................................................................. 13 
Warranty........................................................................................................................ 14 
Additional Information and Support ............................................................................... 14 
 
 
 

QTech Data Systems Limited

Christchurch, New Zealand.

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: +64-3-366-3713

Fax: +64-3-365-2815

Email: [email protected]

Web: www.qtech.co.nz

Revision Details

1.1

June 2013

First issue

1.2

October 2019

Quick Start Guide updated to User Manual.

First issue to support Rev E hardware and firmware.

1.3

January 2020

Clarification of specifications of power use.

About This User Guide

This document provides assistance with the installation and operation of the QTech WP2P Digital & Analogue

system. Included in this document is:

•How to install the WP2P Digital & Analogue modules

•WP2P repeater operation

•Device Configuration

•Device Specifications

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 WP2P modules incorporate high speed digital radios which have a range of up to two kilometres. The

modules use the integrated low power 900MHz digital radios to communicate their input state to the other

module.

Each WP2P –DIGITAL & ANALOGUE module has two switch inputs, two relay outputs, one analogue input and

one analogue output.

The products also support the use of a wireless repeater for transmission range extension. Each WP2P module

can be battery powered with a solar powered charger or connected to a permanent supply. Radio modems

should connect to a permanent supply.

Hardware

Figure 1.

Feature

Function

Power Input (nominally 12 Vdc)

USB Type Mini B –Firmware upgrade and configuration

RF connector SMA

I/O pairs (signal/ground)

-RLY1, RLY2 relay contacts

-INP1, INP2 digital inputs

-AIN analogue input

-AOUT analogue output

Mode pushbutton

LINK Indicator LED (device link communications state)

STAT Indicator LED (device status and power on indicator)

Features

•2 Digital Inputs and 2 Digital (relay contact) outputs

•1 analogue input (0-10V, or 0-20 mA loop) and 1 analogue output (0-10V, or 0-20 mA loop)

•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

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 0.2 seconds

(see notes). With such a fast response time, the WP2P devices can be used for flow meter pulse applications,

allowing pulse rates of up to 5 pulses per second to be communicated.

Analogue I/O

The WP2P –Digital & Analogue operates by copying the analogue input value to the analogue output on the

other module.

WP2P Module 1

Analogue 0-20mA signal input

WP2P Module 2

Analogue 0-20mA signal output

The analogue I/O can be configured for current loop or voltage operation. The factory default configuration is

for current loop operation. The analogue I/O operates over a range of 0-20mA, which makes the WP2P –DIGITAL

& ANALOGUE modules compatible with the industry standard 4-20mA range, which allows detection of an open

circuit failure.

The Analogue I/O has 12 bit resolution, a stated accuracy of +/-1% FSD and is sampled at a rate of once per

second.

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.

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.

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

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 that product. 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.

Avoid mounting in locations that may be subject to shock or vibration or temperature extremes.

Note –If the WP2P is to be enclosed in a metal cabinet then an optional external

antenna will be needed. Please contact QTech for alternative antenna details and advice.

Note –Solar Supplies and design considerations: Before using any device 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.

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.

Input and Output Wiring

Please note the polarity of the analogue I/O connections.

Figure 2. Wiring Diagram (WP2P MODULE-DA)

Jumper Settings

The WP2P-DA device uses internal jumpers to configure the style of analogue input or output: either voltage or

current.

Figure 3. Analogue jumpers (WP2P-DA)

The analogue input jumpers consist of a two- pin jumper header and a three-pin jumper header designated on

the board as AIN. The analogue output jumpers consist of two three-pin jumper headers designated on the

board as AOUT.

Analogue Input Jumpers

Analogue Output

Jumpers

Use the following table to determine Analogue settings:

Function

Settings

0-10V analogue Input

- Remove the jumper from the 2-pin header

- Insert the jumper in the three-pin header at the end marked “V”

0-20 mA analogue input

- Insert the jumper in the two-pin header

- Insert the jumper three-pin header at the end marked “I”

0-10V analogue output

- Insert both the jumpers in the three-pin headers at the end marked “V”

0-20 mA analogue output

- Insert both the jumpers in the three-pin headers at the end marked “I”

Power Supply Notes

Power Supply & Current Consumption

The WP2P MODULE operates from a nominal 12 Volt DC power supply.

Current consumption is ~66mA in standby (no output relays active) to 83/100mA (one or two relays active).

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 12 Volts +/- 1.5 Volt DC. The WP2P-DA incorporates reverse and overvoltage

protection.

The absolute maximum supply voltage is 13.8 V DC and any solar/battery design needs to take this into account.

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.

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.

Over Voltage Protection

The device 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 device will tolerate 13.8 volts but will begin to draw excessive current and blow

the fuse at input voltages >14.6V.

Radio Address (RA)

All WP2P systems have a unique “radio address” which is programmed into WP2P modules during manufacture.

The radio code is represented and specified in the following format “192.168.0.0”, it is a security measure to

prevent unauthorised users.

Note –All WP2P modules in a given system must have the same first three numbers

in their “radio address” and the 4th number must be a sequential pair starting from the

even number e.g 0.1.1.40 & 0.1.1.41. The code is on the rear of WP2P modules. The radio

code 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 location. 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 the adjacent system is “#3” etc.

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