Brasch TRNS Generation 2 Manuale utente

Brasch Environmental Technologies, LLC

140 Long Road, Suite 101

Chesterfield, Missouri 6 005

14-291-0440

www.braschenvtech.com

TRNS Generation 2

Installation / Operation Manual

Table of Contents
Introduction...................................................................................................................................4
General Description..................................................................................................................4
Features and Benefits..............................................................................................................5
Technical Specifications................................................................................................................6
Product Specifications..............................................................................................................6
Target Gas Specifications.........................................................................................................7
Carbon Monoxide.................................................................................................................7
Nitrogen Dioxide...................................................................................................................7
Description of Front Panel Indicators.......................................................................................8
Front Panel Indicators..........................................................................................................8
Operation Safety Notice................................................................................................................9
Types of Notices.......................................................................................................................9
Quick Start Guide.......................................................................................................................10
Step 1 – Mounting..................................................................................................................10
Step 2 – Input Wiring..............................................................................................................10
Step   – Output Wiring...........................................................................................................11
Step 4 – Applying Power.........................................................................................................11
Installation...................................................................................................................................12
Mounting the Transmitter........................................................................................................12
Connecting the Power Supply................................................................................................1 
Connecting the Voltage or Current Proportional Output........................................................14
Connecting the Modbus Output..............................................................................................15
Applying Power For the First Time.........................................................................................15
Installation Diagrams..............................................................................................................16
Operation....................................................................................................................................18
How the Transmitter Senses the Target Gas.........................................................................18
Factory Default Settings.........................................................................................................18
Using the Analog Proportional Output....................................................................................18
Adjusting the Proportional Output..........................................................................................19
Obtaining the Best Operation.................................................................................................19
Carbon Monoxide and/or Nitrogen Dioxide Transmitters...................................................19
Maintenance...............................................................................................................................20
Testing the Response to the Target Gas................................................................................20
Carbon Monoxide or Nitrogen Dioxide Transmitters..........................................................20
Replacing the Sensor.............................................................................................................21
Suggested Repair Parts.........................................................................................................22
Troubleshooting..........................................................................................................................22
Fault........................................................................................................................................22
Checking and Replacing Fuses..............................................................................................22
Common Installation/Operation Mistakes..............................................................................2 
Proportional Output Connected Incorrectly........................................................................2 
Setting the Proportional Output Incorrectly........................................................................2 
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Rev 1.0 – December 22, 2020 2

Using Improper Resistance/Impedance.............................................................................2 
Transmitter Mounted in an Unsatisfactory Location..........................................................2 
Limited Warranty.........................................................................................................................24
Warranty Statement...........................................................................................................24
Service and Repair Procedures.........................................................................................24
Appendix.....................................................................................................................................25
Model Numbers and Descriptions..........................................................................................25
Transmitter Model Number and Description......................................................................25
Figures and Diagrams............................................................................................................25
IOM02
Rev 1.0 – December 22, 2020 

Introduction

General Description

The Brasch Environmental Technologies TRNS Generation 2 Gas Transmitter is designed to

function as a gas sensor and signal transmitter. The transmitter consists of a sensor and

digital control circuitry. A linear proportional output circuit is able to provide analog signals to a

customer-supplied building management controller or a variable-frequency drive. An RS-485

circuit is able to provide two-way digital communication using Modbus RTU. A microprocessor

monitors the signal from the sensor and transmits that signal to the output as either an analog

or digital signal.

The sensor used in the transmitter operates on the electrochemical principle. A current is

produced when the target gas reacts chemically with an electrode inside the sensor. This

small current is changed to a voltage by the transmitter’s circuitry, amplified, and converted to

the proper output signal. This signal is proportional to the target gas concentration present at

the sensor.

The transmitter’s circuitry consists of a printed circuit board mounted inside a polycarbonate

housing. The housing has a NEMA R rating. Vents are located on the bottom and side of the

housing to allow the sensor access to ambient air.

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Rev 1.0 – December 22, 2020 4

Features and Benefits

•Comprehensive Monitoring

◦Detects CO and/or NO2

•Greater Coverage

◦Monitors up to 9,000 sq. ft.

•Enhanced Durability

◦Rainproof Water Resistance

◦Simple Service and Maintenance

•Simplified Installation

◦Preconfigured Wiring

◦Factory Calibration

◦Customized Programming

•Versatile Communication

◦Analog Output via User-Selectable Current or Voltage Loop

◦Digital Output via Modbus RTU Communication Protocol

•Effortless Upgrade

◦Works with New and Existing Building Controls Systems

◦Fully Backwards Compatible with TRNS Generation 1

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Rev 1.0 – December 22, 2020 5

Technical Specifications

Product Specifications

Input Power 24 VAC, 50/60 Hz, 0.25 A

Installation Category II (local level, over-voltage transients less than 500V)

Storage Temperature -50°C to 120°C (-58°F to 248°F)

Operating Temperature -20°C to 50°C (-4°F to 122°F)

Humidity 10% to 90% (non-condensing)

Ventilation Control Relays None

Internal Alarm None

Front Panel Indicators Power (green LED)

Fault (yellow LED)

Display None

Selectable Fan Settings None

Alert Levels None

Delay Times None

Dimensions 4.8” W x 4.72” H x 2.16” D (12.2 cm W x 12 cm H x 5.5 cm D)

Weight 1 lbs (0.5 kg)

Housing Gray, NEMA R, polycarbonate plastic

Compliance ANSI/ISA 92.00.01-2010 (R2015)

EN 50270

FCC Part 15 Subpart B

RoHS

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Rev 1.0 – December 22, 2020 6

Target Gas Specifications

This Brasch Gas Transmitter is available for monitoring carbon monoxide and/or nitrogen

dioxide as target gases. Regulatory agencies have determined the threshold concentrations at

which the gases become dangerous. Brasch Environmental Technologies, LLC has designed

their transmitters so that the measurement ranges for each target gas meet the agencies’

requirements. Each target gas, for which Brasch currently produces a transmitter, is listed

below along with the relevant concentration specifications.

Carbon Monoxide

Full Scale Span: 200 PPM

Resolution: 1 PPM

Minimum Accuracy*: ± 10% or 6 PPM

Expected Lifespan 10 years

Recommended

Recalibration Time 2 years

Nitrogen Dioxide

Full Scale Span: 10 PPM

Resolution: 0.1 PPM

Minimum Accuracy*: ± 15% or 0.8 PPM

Expected Lifespan 10 years

Recommended

Recalibration Time 2 years

*Allowable tolerance for accuracy and repeatability criteria as defined in Annex A, Item 2 of ANSI/ISA 92.00.01-2010 (R2015)

IOM02

Rev 1.0 – December 22, 2020 7

Description of Front Panel Indicators

The front panel indicators convey to the user the operational status of the transmitter. The

following table describes the function of each indicator. Please refer to the transmitter’s front

panel label for the indicator’s location.

Front Panel Indicators

Indicator Color Description

Power Green Glows whenever power is on

Fault Yellow Glows when expected end-of-life is reached

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Rev 1.0 – December 22, 2020 8

Operation Safet Notice

Certain procedures and operations detailed in this manual require that specific precautions be

taken prior to beginning the procedure or operation. When precautions are required, a notice

will be printed in an appropriate location in the manual. The user is urged to read and

understand all such notices.

T pes of Notices

Three types of notices may be used in this manual to describe the severity of the situation

encountered.

WARNING: This notice indicates that conditions exist that could cause personal injury

or loss of life.

CAUTION:Conditions exist that could cause damage to the equipment or other

property.

Note: Special consideration should be given to the procedure or operation,

otherwise an unexpected operational result could occur.

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Rev 1.0 – December 22, 2020 9

Quick Start Guide

Please read this entire manual before attempting to install and operate this gas transmitter.

This guide is only intended to provide the basic steps necessary for installation and operation.

Each step will reference the portion of the manual where more complete information can be

obtained.

Step 1 – Mounting

Determine the location for mounting your transmitter(s). The location(s) may be indicated on

the architectural drawing. Also, the owner or designer of the facility may be consulted.

Mounting guidelines can be found on page 12 of this manual.

Step 2 – Input Wiring

Provide a dedicated circuit at the required 24 VAC and 6 VA at each transmitter mounting

location. Follow all national and local wiring codes. The wiring should be at least 14 AWG. A

conductor connected to earth ground should also be provided. The circuit must include a

disconnect switch located within easy reach of the transmitter.

Color-coded wires exiting the transmitter housing through the top conduit connector are

provided for connecting the operating voltage to the transmitter. Therefore, it should not be

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Rev 1.0 – December 22, 2020 10

WARNING

This transmitter may require the use of voltage levels high enough to cause fatal injuries.

Proper procedures must be followed any time work is performed on this unit.

Only qualified personnel should attempt to install, maintain, or service this equipment.

CAUTION

Operating this transmitter with the incorrect voltage and power requirements can cause

internal electrical components to overheat and fail. Operation with the wrong power

requirement will void the manufacturer’s warranty and the installer will be responsible for any

damage that occurs.

Contact Brasch Environmental Technologies, LLC before connecting power to the transmitter

if you are unsure of the correct power requirement.

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