Bacharach MGS-408 Specifications

2. Safety Instructions (Continued)

Gas Detection Controller

for Commercial & Industrial Applications

Refrigerant Leak Detection

P/N: 1100-2292 | February 2019 Revision 0

Languages

This quick start guide has been translated into the
following languages: Deutsch, Español, Français,
Italiano and Nederlands. To download a translated

document, scan here or visit http://bit.ly/2TbbFNb.

1. Introduction

The MGS-408 Gas Detection Controller displays
comprehensive information about the status of all
connected gas detectors. A maximum of eight (8) gas
sensors can be connected to the MGS-408 via Modbus RTU.

Compatible Bacharach gas detectors are the MGS-410,
MGS-450, MGS-460, MGS-250 and MGS-550.

Quick Start
Guide

WARNING: Extreme care should be exercised when

accessing the product’s interior. Only qualied electrical

maintenance personnel should perform connections
and adjustments. Always remove AC power before
working inside the MGS-408’s enclosure.

WARNING: Use a DRY CLOTH to clean the outside of this
product. DO NOT use soap and water or other detergents.
Failure to comply may result in a potential shock hazard.

CAUTION: The protection provided by this product may

become impaired if it is used in a manner not specied by
the manufacturer. Modications to this instrument, not
expressly approved, will void the warranty.

CAUTION: Use ONLY the provided cable glands for
electrical and communication wiring. Drilling into the box
will void the warranty.

A certied AC power disconnect or circuit breaker should

be mounted near the controller and installed following
applicable local and national codes. If a switch is used
instead of a circuit breaker, a properly rated CERTIFIED
fuse or current limiter is required to be installed as per
local or national codes. Markings for positions of the

switch or breaker should state (I) for on and (O) for o.

4. Key Specications

Si ze (H×W×D): 11.0″ × 8.5″ × 3.9″ (280 × 215 × 100

Weight: 2.76 lbs (1250 g)

Indicators: Multi-color Status LED

Alarm Delay: Congurable (0 to 15 minutes)

Inputs: Tactile Switches (×2), Magnetic

Outputs: Analog Output: 4 to 20 mA, 0 to 5V, 0 to

Bluetooth

®

mm)

Internal Alarm Buzzer: 72dB @ 3.9″ (10 cm)

Switches (×2)

10V, 1 to 5V (default) or 2 to 10V

Bluetooth® Low Energy, BLE 4.2

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 a qualied repair technician or

the nearest Bacharach Service Center.

CODE COMPLIANCE: Comply with all local and national

laws, rules and regulations associated with this equipment.

Operators should be aware of the regulations and standards in
their industry / locality for the operation of the MGS-408.

TECHNICIAN USE ONLY: The MGS-408 must be installed

by a suitably qualied technician who will install this unit in

accordance with these instructions and the standards in their

particular industry / country. This document is only intended
as a guide and the manufacturer bears no responsibility for the
installation or operation of this unit.

Failure to install and operate the unit in accordance with
these instructions and with industry guidelines may cause
serious injury or death and the manufacturer will not be held
responsible in this regard.

Power Supply: 100 - 240 VAC, 50 / 60 HZ, 80W

(maximum)

Wiring (Power): 2-core cable, 16 to 28 AWG

Wiring (Relays): 2-core cable, 16 to 28 AWG

Wiring (Modbus): Recommended: Belden 3106A (or

equivalent) 3-core, 2 twisted pair +
ground, shielded cable with 120
Ω characteristic impedance, 16 to
28 AWG

Enclosure: Material: ABS

Protection: IP66

Temperature: 32 to 113°F (0 to 45°C)

2. Safety Instructions

DANGER: The MGS-408 is NOT certied or approved for
operation in oxygen-enriched atmospheres. Failure to
comply may result in EXPLOSION.

WARNING: NEVER operate the MGS-408 without
connection to a protective ground. Failure to comply
may result in a potential shock hazard and is a
violation of electrical safety standards.

Modbus: Connection: RS-485 terminal block

Baud Rate: 9,600 (default) or 19,200
Data Bits: 8
Parity: None (default), odd or even
Stop Bits: 1 (default) or 2
Retry Time: 500 ms (minimum)

Humidity: 5 to 90% RH, non condensing

Pressure: 23.6 to 32.5″Hg (800 to 1,100 mbar)

Elevation: 0 to 6,560′ (2,000 m) altitude

5.118

5. Mounting Template

FULL-SIZE MOUNTING

TEMPLATE

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DO NOT RESCALE

8.996