aquilar aquitron AT-MGS-408 Installation instructions

INSTALLATION
& OPERATION
INSTRUCTIONS
AquiTron
AT-MGS-408
Gas Detection Controller

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AT-MGS-408 User Manual
Table of Contents
Introduction .................................................. 1
1.1. About this Manual ..................................................................................................... 1
1.2. Conventions................................................................................................................ 1
1.2.1 Short Form Instructions...................................................................................................................... 1
1.2.2 Iconography......................................................................................................................................... 2
1.3. General Safety Statements....................................................................................... 2
Product Description...................................... 4
2.1. Product Overview ...................................................................................................... 4
2.2. Intended Use .............................................................................................................. 5
2.3. Design Features ......................................................................................................... 6
2.4. Components ............................................................................................................... 7
2.5. Communication Features ......................................................................................... 8
Installation .................................................... 9
3.1. Warnings & Cautions ................................................................................................. 9
3.2. Preliminary Inspection.............................................................................................. 9
3.3. Suitable / Appropriate Locations ............................................................................. 10
3.4. Mounting the Gas Detection Controller.................................................................. 10
3.5. Electrical Wiring ......................................................................................................... 11
3.6. Communications Connections ................................................................................. 12
3.6.1 AT-MGS-408 Gas Detection Controller Network .............................................................................. 12
3.6.2 Integration with Building Management System .............................................................................. 13
3.7. Connecting External Alarms ..................................................................................... 14
3.7.1 Overview............................................................................................................................................... 14
3.7.2 Connection Procedure........................................................................................................................ 14
Operation...................................................... 15
4.1. Overview ..................................................................................................................... 15
4.1.1 Main Function...................................................................................................................................... 15
4.1.2 Power Up.............................................................................................................................................. 15
4.1.3 Channel Number Keys ........................................................................................................................ 15
4.1.4 Menu Access and Navigation............................................................................................................. 15
4.2. Controller Setup......................................................................................................... 16
4.2.1 Setup Parameters ............................................................................................................................... 17
4.2.2 Relay Setup .......................................................................................................................................... 17
4.2.3 Audible/Visual (AV) Alarm Beacon..................................................................................................... 18
4.2.4 Fault Latching...................................................................................................................................... 18

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AT-MGS-408 User Manual
4.2.5 LCD Contrast........................................................................................................................................ 19
4.2.6 LED Brightness & Auto-dimming ....................................................................................................... 19
4.2.7 Date/Time............................................................................................................................................. 20
4.2.8 Password Protection........................................................................................................................... 20
4.2.9 Factory Reset........................................................................................................................................ 21
4.2.10 Update Firmware ................................................................................................................................ 21
4.3. Channel Summary and Setup................................................................................... 22
4.3.1 Channel Setup Overview .................................................................................................................... 23
4.3.2 CH(X) MON (Monitor).......................................................................................................................... 23
4.3.3 CH(X) TYP (Instrument Type) .............................................................................................................. 24
4.3.4 CH(X) ADR (Node Address).................................................................................................................. 24
4.3.5 CH(X) LOC (Location)........................................................................................................................... 25
4.4. Data Logging............................................................................................................... 25
4.4.1 Data Logging Overview....................................................................................................................... 25
4.4.2 SD Card Requirements ....................................................................................................................... 25
4.4.3 Data Logging Menu............................................................................................................................. 25
MODBUS........................................................ 27
5.1. MODBUS Overview .................................................................................................... 27
5.1.1 MASTER BAUD RATE ............................................................................................................................ 27
5.1.2 SLAVE NODE ADDRESS ........................................................................................................................ 27
5.1.3 SLAVE BAUD RATE................................................................................................................................ 28
5.1.4 SLAVE PARITY ...................................................................................................................................... 28
5.1.5 SLAVE STOP BIT.................................................................................................................................... 28
5.1.6 SLAVE TERMINATION .......................................................................................................................... 28
5.2. MODBUS Registers..................................................................................................... 29
Diagnostics & Troubleshooting .................. 36
6.1. Diagnostic Menu ........................................................................................................ 36
6.1.1 DISPLAY CURRENT FAULT.................................................................................................................... 36
6.1.2 DISPLAY LAST FAULT............................................................................................................................ 37
6.1.3 CLEAR FAULT ........................................................................................................................................ 37
6.1.4 CLEAR LAST FAULT ............................................................................................................................... 37
6.1.5 CLEAR LAST SD FAULT ......................................................................................................................... 37
6.1.6 POWER.................................................................................................................................................. 37
6.1.7 MODBUS SLAVE ................................................................................................................................... 38
6.1.8 MODBUS MASTER................................................................................................................................ 38
6.2. FAULT CODES.............................................................................................................. 39
6.3. SYSTEM TESTS............................................................................................................. 40
6.3.1 RELAY TEST ........................................................................................................................................... 40
6.3.2 LED TEST............................................................................................................................................... 40
6.3.3 KEYPAD TEST ........................................................................................................................................ 40
6.3.4 STROBE TEST ........................................................................................................................................ 40
6.3.5 FAN TEST............................................................................................................................................... 40

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AT-MGS-408 User Manual
Additional Information ............................... 41
7.1. Disposing of Instrument ........................................................................................... 41
7.2. TechnicalSpecications............................................................................................ 41
Parts and Accessories.................................. 42
8.1. Part Numbers............................................................................................................. 42

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AT-MGS-408 User Manual
1. Introduction
1.1. About this Manual
Thank you for investing in a Aquitron AT-MGS-408 Gas Detector Controller. To ensure
operator safety and the proper use of the controller, please read the contents of this
manual for important information on the operation and maintenance of the instrument.
IMPORTANT: Before using this product, carefully read and strictly follow the
instructions in the manual. Ensure that all product documentation is retained
and available to anyone operating the instrument.
1.2. Conventions
1.2.1 Short Form Instructions
This document uses a short form for describing steps (e.g. executing a command).
Example:
Clearing the current fault.
Short Form Instructions:
Main Menu Diagnostics Clear Fault press OK to clear the current fault.
Steps Required:
1. Press “OK” to access the Main Menu.
2. Select “Diagnostics.”
3. Select “Clear Fault.”
4. When prompted, press “OK” to clear the current fault.

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AT-MGS-408 User Manual
1.2.2 Iconography
Alert Icon Description
DANGER Imminently hazardous situation which, if not avoided, will
result in death or serious injury.
WARNING Potentially hazardous situation which, if not avoided,
could result in death or serious injury.
WARNING Potential electrical shock hazard which, if not avoided,
could result in death or serious injury.
CAUTION
Potentially hazardous situation which, if not avoided,
could result in physical injury or damage to the product
or environment. It may also be used to alert against
unsafe practices.
IMPORTANT Additional information on how to use the product.
1.3. General Safety Statements
IMPORTANT: Before using this product, carefully read and strictly follow the
instructions in the manual. Ensure that all product documentation is retained
and available to anyone operating the instrument.
DANGER: This instrument is neither certied nor approved for operation in
oxygen-enriched atmospheres. Failure to comply may result in personal injury
or death.
WARNING: Under no circumstances should this product be operated without
connection to a protective ground. Failure to comply may result in a potential
shock hazard and is a violation of electrical safety standards applicable to this
category of equipment.
WARNING: Always remove AC power before working inside the AT-MGS-408
enclosure and exercise extreme care when accessing the products interior.
Only qualied electrical maintenance personnel should perform connections
and adjustments.
WARNING: DO NOT use soap and water or other detergents to clean the
outside of this product; use a DRY CLOTH only. Failure to comply may result in
a potential shock hazard.

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AT-MGS-408 User Manual
CAUTION: The protection provided by this product may become impaired if
it is used in a manner not specied by the manufacturer. Modications to this
instrument, not expressly approved, will void the warranty.
CAUTION: In case of malfunction, DO NOT continue to use this equipment
if there are any symptoms of malfunction or failure. In the case of such
occurrence, de-energize the power supply and contact Aquilar on 01403
216100.
CAUTION: Use ONLY the provided cable glands for electrical and
communication wiring. Drilling into the box will void the warranty.

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AT-MGS-408 User Manual
2. Product Description
2.1. Product Overview
The AT-MGS-408 Gas Detection Controller displays comprehensive and centralized
information about the status of all connected gas detectors. A maximum of eight
AquiTron gas detectors can be connected to the AT-MGS-408 via Modbus RTU.
Compatible gas detectors are:
• AT-MGS-410 • AT-MGS-550
• AT-MGS-450
• AT-MGS-460
The AT-MGS-408 can be used to provide power to each connected, compatible gas
detector, negating the need for separate power supply at the location of the gas
detector.
The AT-MGS-408 displays status via an LCD screen and a bank of LEDs that
represent the channel / sensor connected to it. Each channel / sensor has a row of
dedicated LEDs to indicate the status of the sensor:
• Power • Low alarm
• High alarm • Fault
The LCD screen will display the current gas reading and gas type for the selected
channel, or will indicate fault and/or alarm status. The LCD screen is also used for
conguration of the AT-MGS-408 via the integrated keypad.
In addition to the LED alarm status, the AT-MGS-408 includes an integrated audible
alarm. An optional beacon can be installed, mounted in the top of the enclosure, to
enhance local alarm indication.
The AT-MGS-408 provides relays (indicating any high alarm, low alarm or fault status) and
can act as a Modbus slave device. This allows connection to a third-party device such
as a Building Management System (BMS) or Programmable Logic Controller (PLC).
Data logging is available on the AT-MGS-408 via the integrated SD card, which can
be removed to allow download of the logged data to a computer. The data will

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AT-MGS-408 User Manual
include a date stamp of all high and low alarms as well as all faults.
Figure 2-1 - AT-MGS-408 Gas Detection Controller with Optional External Beacon
WARNING: This instrument is neither certied nor approved for operation in
oxygen-enriched atmospheres. Failure to comply may result in EXPLOSION.
WARNING: For your safety, DO NOT use this instrument in locations classied
as hazardous because it has not been designed to be intrinsically safe for use
in such areas.
2.2. Intended Use
The AT-MGS-408 provides audio-visual alerts and information pertaining to the
status of a centralized gas detector network. This information allows concise, at-a-
glance notication of any alarm or fault status regarding a connected gas detector
located outside the monitored space, as required by many regulatory codes and
standards.

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AT-MGS-408 User Manual
2.3. Design Features
Power Options 100 - 240 VAC, 50/60 Hz, 80 W (max.)
Provides power for 1 - 8 compatible AquiTron gas detectors
Output/
Communications
RS485 Modbus RTU Master for Gas Detectors
Diagnostic / Status LEDs
yController (power, fault)
yGas Detectors (power, fault, low alarm, high alarm)
Outputs
y3 × Relays (fault, low alarm, high alarm), Fail-safe Option
yRS485 Modbus RTU Slave
Optional
yExternal Beacon (red, blue, green, yellow)
Data Logging Via supplied 32GB SD card; will hold up to 10 years of
logged data.
User Interface LCD Display screen
Integrated keypad
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