Nortech NX12 User Manual

August 2018

www.nortechonline.co.uk

Doc ref: D_002333

NX12

Micro GSM RTU

USER MANUAL

Version 1.8

NX12

Micro GSM RTU

Page 2 of 25

Publication Notice

Copyright © Nortech Management Limited (NML). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, including photocopying, electronic, mechanical, recording or otherwise, without the prior written permission of the copyright holder.

NML provide this document as is, without warranty of any kind either expressed or implied including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. NML may make changes or improvements in the software, equipment, or specifications described in this document at any time and without notice. These changes may be incorporated in new releases of this document.

This publication could contain technical inaccuracies or typographical errors. NML shall not be liable for any damages (including, but not limited to, consequential, indirect or incidental, special damages or loss of profits or data) even if NML have been informed of their potential occurrence, arising out of or in connection with this document or its use.

English Edition

IBM PC is a trademark of International Business Machines Inc.

Windows is a trademark of Microsoft Corporation.

All other trademark names used in this manual are hereby acknowledged.

NX12

Micro GSM RTU

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Contents

1 Safety & notices ....................................................................................... 5

1.1 Safety ............................................................................................... 5

1.2 Qualified users ................................................................................... 5

1.3 Notices .............................................................................................. 5

1.4 Versions ............................................................................................ 5

2 NX12 RTU Description ............................................................................... 6

2.1 Applications ....................................................................................... 6

2.2 Central iHost User Interface ................................................................. 6

2.3 Communications ................................................................................. 6

3 NX12 RTU Set-up Requirements ................................................................. 7

3.1 Auxiliary power supply ........................................................................ 7

3.2 Battery Operation ............................................................................... 7

3.3 USB Port / Field Support Kit ................................................................. 7

4 NX12 RTU Firmware Functions .................................................................... 9

4.1 Clock ................................................................................................ 9

4.2 Inputs / Outputs ................................................................................. 9

4.3 Auxiliary Supply On/Off ....................................................................... 9

4.4 Binary Inputs ..................................................................................... 9

4.5 Counter Inputs ................................................................................. 10

4.6 Analogue Inputs ............................................................................... 10

4.7 Output Channels ............................................................................... 11

4.8 RS485 Modbus ................................................................................. 11

4.9 RTU / Communication Events ............................................................. 11

4.10 Data Log Sizes ............................................................................... 11

4.11 Input monitoring during iHost calls .................................................. 11

4.12 Connection between the RTU and iHost ............................................ 11

4.13 Reconfiguration of the RTU settings.................................................. 12

5 NX12 RTU Operation ............................................................................... 13

5.1 Cold Start ........................................................................................ 13

5.2 LED Indicators .................................................................................. 13

5.3 RTU connection to the iHost system .................................................... 13

5.4 Call Retry Algorithm .......................................................................... 13

6 Installation ............................................................................................ 15

6.1 Qualified Users ................................................................................. 15

6.2 AC Powered Models ........................................................................... 15

NX12

Micro GSM RTU

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6.3 DC Powered Models .......................................................................... 15

6.4 Procedure ........................................................................................ 15

6.5 Circuit Board Layout ......................................................................... 15

6.6 PCB Connections .............................................................................. 16

6.7 Wiring Connection Diagrams .............................................................. 18

6.7.1 Digital Inputs ............................................................................. 18

6.7.2 Analogue Inputs ......................................................................... 19

6.7.3 Output Channels ......................................................................... 20

6.8 Enclosure and mounting .................................................................... 21

6.8.1 DIN Rail option ........................................................................... 21

6.8.2 Enclosure option ......................................................................... 21

7 Maintenance .......................................................................................... 22

7.1 Technical assistance .......................................................................... 22

7.2 Communications test ........................................................................ 22

7.3 I/O tests .......................................................................................... 22

7.4 Replacing the Battery ........................................................................ 22

7.5 Recycling ......................................................................................... 23

8 Specification Data .................................................................................. 24

8.1 General ........................................................................................... 24

8.2 AC powered units ............................................................................. 24

8.3 DC powered units ............................................................................. 24

8.4 EMC ................................................................................................ 25

8.5 Environmental .................................................................................. 25

NX12

Micro GSM RTU

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1 Safety & notices

1.1 Safety

For AC supply variants:

The AC supply should be isolated prior to opening the enclosure and should not be reconnected until the enclosure lid is secured.

Isolate from Mains before removing cover.

1.2 Qualified users

Users should ensure they are suitably trained and qualified prior to working on the NX12.

Installation should be carried out in accordance with local procedures and company safety and operational guidelines.

1.3 Notices

Battery

Do not attempt to charge the battery – risk of explosion. Do not short circuit, crush, disassemble or heat above 100°C, incinerate or expose contents to water.

AC Supply

(only applies to AC powered models)

Isolate from Mains before removing cover.

100-240V AC

50-60Hz

100mA rated current

DC Supply

(only applies to DC powered models)

12-24V DC

500mA rated current

Disposal

Battery and NX12 unit should be disposed of in accordance with local regulations.

1.4 Versions

This document describes the current build version and software functionality of the NX12 product. Earlier versions and software releases may differ. Please consult Nortech for earlier versions of this document.

NX12

Micro GSM RTU

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2 NX12 RTU Description

2.1 Applications

The NX12 RTU (Remote Terminal Unit) is a telemetry device that is suitable for use in fixed site alarm monitoring and control applications.

The NX12 provides monitoring and control of equipment via digital inputs, counter inputs, analogue inputs, control outputs and RS485 (using Modbus RTU). Typical applications include:

▪ LV substation monitoring and control. ▪ Pump and pump station monitoring. ▪ Wind farm site monitoring. ▪ General plant alarm panel monitoring. ▪ Tank level monitoring. ▪ Circuit breaker operation monitoring. ▪ Fault Passage Indicator monitoring.

2.2 Central iHost User Interface

The NX12 is remotely monitored from the Nortech “iHost” system. Users access

iHost via a unique username and password. The iHost system stores and displays equipment status and alarm data, along with related event history and statistics. It also provides remote NX12 configuration tools. Data is displayed in lists, record details, maps, diagrams, tables and graphs.

For larger customers, a dedicated private iHost System can be installed at their own premises on their own servers.

The functionality of the iHost User Interface is beyond the scope of this document.

2.3 Communications

The NX12 includes an in-built, quad-band GPRS wireless modem and antenna. There are 3G and 4G factory options available for different regions – please contact Nortech to discuss your requirements.

NX12

Micro GSM RTU

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3 NX12 RTU Set-up Requirements

3.1 Auxiliary power supply

The NX12 requires an auxiliary AC or DC supply (factory set option).

AC powered units

The NX12 requires a two (2) wire AC supply. Observe correct polarity.

It is the users’ responsibility to ensure local wiring regulations are complied with

during installation.

AC powered units may be fitted with a long life, non-rechargeable, lithium battery to power the unit when the AC supply is off.

Suitable batteries and replacements are available from Nortech.

DC powered units

The NX12 requires a 12-24V DC supply. Observe correct polarity.

It is the users’ responsibility to ensure local wiring regulations are complied with

during installation.

DC powered units may be fitted with a long life, non-rechargeable, lithium battery to power the unit when the DC supply is off.

Suitable batteries and replacements are available from Nortech.

3.2 Battery Operation

The NX12 monitors its auxiliary power supply. When the auxiliary supply is lost, provided a battery is connected, the unit will continue to operate as follows:

Condition

Behaviour

First 1 minute after loss of auxiliary supply

Normal operation. Modem is switched off once the loss of supply is

reported to the Host.

1 minute to 12 hours (configurable) after loss of auxiliary supply

Low power mode: Modem switched off, will be turned on for

communications as required. Analogue and Digital Inputs scan rate reduced to

250ms. RS485 Modbus polling stops.

12 hours (configurable) after loss of supply

Conserve battery: Unit auto powers off. Unit will restart when auxiliary supply returns.

3.3 USB Port / Field Support Kit

The NX12 is normally shipped with the customer’s default parameter values already

configured.

The NX12 provides a USB interface to allow the user to configure operational parameters from a laptop/PC. Parameters are stored in non-volatile memory (they are retained during power outages).

NX12

Micro GSM RTU

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The NX Field Support Kit (FSK) is a software application that enables users to interrogate the status and settings of the RTU and to inspect the archived logs.

The principle use of the FSK is to set the connection details that enable communication between the RTU and the iHost system via a mobile network. This entails configuring the SIM card(s) within the RTU. Once connection has been established, the NX12 RTU may be reconfigured remotely from the iHost system.

The NX FSK is described in a separate document.

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Nortech NX12 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual