BRT Systems LDSBus LS040101A User manual

Copyright © BRT Systems Pte Ltd 1
LDSBus pH Sensor Adapter Datasheet
Version 1.1
Document Reference No.: BRTSYS_000004 Clearance No.: BRTSYS#012
1Introduction
The LDSBus pH Sensor Adapter is designed
to work with pH probes to form a complete
pH sensor. The adapter consists of a built-
in BNC connector used to attach pH
probes. The adapter and probe are
calibrated using a 2-point calibration
algorithm and supports measurement of
pH ranging from 0 to 14 pH with a 0.01 pH
resolution. The adapter and probe
combination is suitable for use in
applications such as nutrient tanks, water
treatment plants, sewage treatment
plants, swimming pools. Real time
monitoring, alert notifications and control
automation can be achieved.
Neither the whole nor any part of the information contained in, or the product described in this manual, may be adapted, or
Reproduced in any material or electronic form without the prior written consent of the copyright holder. This product and its
documentation are supplied on an as-is basis and no warranty as to their suitability for any particular purpose is either made or implied.
BRT Systems Pte Ltd will not accept any claim for damages howsoever arising as a result of use or failure of this product. Your statutory
rights are not affected. This product or any variant of it is not intended for use in any medical appliance, device, or System in which the
failure of the product might reasonably be expected to result in personal injury. This document provides preliminary information that
may be subject to change without notice. No freedom to use patents or other intellectual property rights is implied by the publication of
this document. BRT Systems Pte Ltd, 178 Paya Lebar Road, #07-03, Singapore 409030. Singapore Registered Company Number:
202220043R
LDSBus pH Sensor
Adapter
Datasheet
1.1 Features
•pH Sensor Adapter to integrate with any pH
probe with a BNC connecter
•Measures pH range of 0 to 14pH with linearized
output and 0.01 pH resolution
•2 Point calibration guided step-by-step
•BRTSYS LDSBus protocol. Wired data/power
transmission through LDSBus HVT-Junction
•High report rate of 1 report every 5 seconds
•Low power consumption 5V-108mW
•Operating temperature range : 0°C to +70°C
•Flush Mount and DIN Rail Mount options
•Supported platform application: BRTSYS
IoTPortal and LDSBus Python SDK
(Visit https://brtsys.com/resources)

Copyright © BRT Systems Pte Ltd 2
LDSBus pH Sensor Adapter Datasheet
Version 1.1
Document Reference No.: BRTSYS_000004 Clearance No.: BRTSYS#012
2Part Numbers
Part#
Naming
LS040101A
LDSBus pH Sensor Adapter
LA120101A
LDSBus DIN Rail Mount Set

Copyright © BRT Systems Pte Ltd 3
LDSBus pH Sensor Adapter Datasheet
Version 1.1
Document Reference No.: BRTSYS_000004 Clearance No.: BRTSYS#012
Table of Contents
1Introduction.................................................................... 1
2Part Numbers .................................................................. 2
3Product Specifications..................................................... 4
4Hardware Features.......................................................... 5
5Sensor Configuration and Installation............................. 6
5.1 Connection Diagram.................................................................. 6
6Mounting Options ............................................................ 7
6.1 Flush Mount .............................................................................. 7
6.2 DIN Rail Mount.......................................................................... 7
7System Status LED Indicators ......................................... 8
7Probe Selection ............................................................... 9
8Mechanical Dimension................................................... 10
9Contact Information...................................................... 11
Appendix A –References ................................................... 12
Document References ..................................................................... 12
Acronyms and Abbreviations ........................................................... 12
Appendix B –List of Figures and Tables............................. 13
List of Figures ................................................................................. 13
List of Tables ................................................................................... 13
Appendix C –Revision History ........................................... 14

Copyright © BRT Systems Pte Ltd 4
LDSBus pH Sensor Adapter Datasheet
Version 1.1
Document Reference No.: BRTSYS_000004 Clearance No.: BRTSYS#012
3Product Specifications
Features
Interface
BNC (Connect to pH probe), RS485
LED Indicator (RGB)
System Status Indicator (Please refer to LED
section)
Mounting
Flush Mount
DIN Rail Mount
Power
Input Voltage
5V DC Bus Power
Typical Power
5V 108mW
Max. Power
218mW
pH Sensor input
module
Range
0 –14pH
Resolution
0.01pH
Response Time
<1Minute
Calibration
2 Point Calibration
Physical
Characteristics
Color
White
Housing
Polycarbonate
Dimensions
L117.6mm x W42.9mm x H29.7mm
Environmental
Limits
Operating Temperature
0 to 70°C
Storage Temperature
-20 to 85°C
Ambient Relative
Humidity
5 to 95% (non-condensing)
Package Contents
Device
1x LDSBus pH Sensor Adapter
Installation (Optional)
1x DIN Rail Bracket set
Wire Assembly
1X 5m RJ11 Cable
Table 1 - LDSBus pH Sensor Adapter Specifications

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LDSBus pH Sensor Adapter Datasheet
Version 1.1
Document Reference No.: BRTSYS_000004 Clearance No.: BRTSYS#012
4Hardware Features
Figure 1 - LDSBus pH Sensor Adapter Hardware Features
pH Electrode Probe
System Status
LED Indicator
BNC
Connector
LDSU RJ11 Port
Flush Mount Slot
Din Rail Plate

Copyright © BRT Systems Pte Ltd 6
LDSBus pH Sensor Adapter Datasheet
Version 1.1
Document Reference No.: BRTSYS_000004 Clearance No.: BRTSYS#012
5Sensor Configuration and Installation
Please visit https://brtsys.com/resources to access the LDSBus Configuration Utility Guide on how to
configure the device name, address, and termination settings before using it for your application.
5.1 Connection Diagram
Figure 2 illustrates the connection of the LDSBus pH Sensor Adapter (LDSBus Device) to the LDSBus.
Please visit https://brtsys.com/resources to view the full device application, setup, and installation
guides.
Figure 2 - LDSBus pH Sensor Adapter to LDSBus - Connection Diagram
Setup Instructions:
1. Connect the first LDSBus HVT-Junction to any of the LDSBus Host Systems using the RJ45
(CAT5e) cable.
2. Connect the configured LDSBus pH Sensor to the LDSBus HVT-Junction as shown in Figure 2.
3. If there is more than one LDSBus HVT-Junction, chain them together as shown in Figure 2.

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LDSBus pH Sensor Adapter Datasheet
Version 1.1
Document Reference No.: BRTSYS_000004 Clearance No.: BRTSYS#012
6Mounting Options
6.1 Flush Mount
The LDSBus pH Sensor Adapter can be flush mounted directly on a wall or any flat surface using 2
M3.5*16mm (thread) screws.
Figure 3 - LDSBus pH Sensor Adapter Flush Mount
6.2 DIN Rail Mount
The LDSBus pH Sensor can be mounted on a DIN Rail using the LDSBus DIN Rail Mount set. This set is
optional and includes the bracket and mounting screws.
Figure 4 –LDSBus pH Sensor Adapter DIN Rail Mount
2xM3.5*16mm
DIN Rail Mount

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LDSBus pH Sensor Adapter Datasheet
Version 1.1
Document Reference No.: BRTSYS_000004 Clearance No.: BRTSYS#012
7System Status LED Indicators
LDSU devices come with a tri-color LED, and LED status colors are mentioned in the table below.
Status display colors
1. RED - Device in error conditions
2. YELLOW - Un-configured device
3. GREEN - Device in normal state (Device termination is OFF)
4. BLUE - Device in normal state (Device termination is ON)
Device
Status
LED Color
Flashing
Frequency
Description
Un-configured
device
YELLOW
LED flashing @1Hz
Un-configured device with factory default
address (126)
Configured
device
GREEN
Steady–Non-
flashing
Configured device (Device ID 1-125) and
device is idle.
BLUE
Addressed
device
GREEN
LED flashing @5Hz
Device is busy communicating.
BLUE
Identified
device
GREEN
LED flashing @1Hz
Device in identify state.
BLUE
Device error
RED
Steady –Non-
flashing
Device error has occurred.
Firmware
update
YELLOW
Steady –Non-
flashing
Device firmware update.
Table 2 –LDSBus pH Sensor Adapter –System Status LED Indicator

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LDSBus pH Sensor Adapter Datasheet
Version 1.1
Document Reference No.: BRTSYS_000004 Clearance No.: BRTSYS#012
7Probe Selection
The following specifications are recommended for selecting a Probe -
pH Range : 0~14pH
Connector Interface : BNC
Zero Point : Max. 7±0.5pH
Theoretical slope % : ≥90% and ≤105%
Internal Resistance : ≤250MὨ
For more information on calibration, please refer to
BRTSYS_AN_001_LDSBus_Configuration_Utility_User_Guide

Copyright © BRT Systems Pte Ltd 10
LDSBus pH Sensor Adapter Datasheet
Version 1.1
Document Reference No.: BRTSYS_000004 Clearance No.: BRTSYS#012
8Mechanical Dimension
Figure 5 –LDSBus pH Sensor Adapter Dimension –Top View
Figure 6 –LDSBus pH Sensor Adapter Dimension –Side View
Figure 7 –LDSBus pH Sensor Adapter Dimension –Bottom View
Note: All dimensions are in millimetres.
29.7

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LDSBus pH Sensor Adapter Datasheet
Version 1.1
Document Reference No.: BRTSYS_000004 Clearance No.: BRTSYS#012
9Contact Information
Head Quarters –Singapore
BRT Systems Pte Ltd
178 Paya Lebar Road, #07-03
Singapore 409030
Tel: [phone]
Fax: [phone]
E-mail (Sales)
[email protected]
E-mail (Support)
[e-mail]
Web Site
http://brtsys.com/
Distributor and Sales Representatives
Please visit the Sales Network page of the BRT Systems Web Site for the contact details of our distributor(s) and sales
representative(s) in your country.
System and equipment manufacturers and designers are responsible to ensure that their systems, and any BRT Systems Pte Ltd (BRTSYS)
devices incorporated in their systems, meet all applicable safety, regulatory and system-level performance requirements. All application-related
information in this document (including application descriptions, suggested BRT Systems devices and other materials) is provided for reference
only. While BRT Systems has taken care to assure it is accurate, this information is subject to customer confirmation, and BRT Systems
disclaims all liability for system designs and for any applications assistance provided by BRT Systems. Use of BRT Systems devices in life
support and/or safety applications is entirely at the user’s risk, and the user agrees to defend, indemnify, and hold harmless BRT Systems from
any and all damages, claims, suits, or expense resulting from such use. This document is subject to change without notice. No freedom to use
patents or other intellectual property rights is implied by the publication of this document. Neither the whole nor any part of the information
contained in, or the product described in this document, may be adapted, or reproduced in any material or electronic form without the prior
written consent of the copyright holder. BRT Systems Pte Ltd, 178 Paya Lebar Road, #07-03, Singapore 409030. Singapore Registered
Company Number: 202220043R.

Copyright © BRT Systems Pte Ltd 12
LDSBus pH Sensor Adapter Datasheet
Version 1.1
Document Reference No.: BRTSYS_000004 Clearance No.: BRTSYS#012
Appendix A –References
Document References
BRTSYS_AN_001_LDSBus_Configuration_Utility_User_Guide
BRTSYS_API_001_LDSBus_Python_SDK_Guide
Sensor_Actuator Quick Start Guide
Acronyms and Abbreviations
Terms
Description
DC
Direct Current
LED
Light Emitting Diode

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LDSBus pH Sensor Adapter Datasheet
Version 1.1
Document Reference No.: BRTSYS_000004 Clearance No.: BRTSYS#012
Appendix B –List of Figures and Tables
List of Figures
Figure 1 - LDSBus pH Sensor Adapter Hardware Features.................................................................. 5
Figure 2 - LDSBus pH Sensor Adapter to LDSBus - Connection Diagram .............................................. 6
Figure 3 - LDSBus pH Sensor Adapter Flush Mount ........................................................................... 7
Figure 4 –LDSBus pH Sensor Adapter DIN Rail Mount ...................................................................... 7
Figure 5 –LDSBus pH Sensor Adapter Dimension –Top View .......................................................... 10
Figure 6 –LDSBus pH Sensor Adapter Dimension –Side View.......................................................... 10
Figure 7 –LDSBus pH Sensor Adapter Dimension –Bottom View ..................................................... 10
List of Tables
Table 1 - LDSBus pH Sensor Adapter Specifications .......................................................................... 4
Table 2 –LDSBus pH Sensor Adapter –System Status LED Indicator.................................................. 8

Copyright © BRT Systems Pte Ltd 14
LDSBus pH Sensor Adapter Datasheet
Version 1.1
Document Reference No.: BRTSYS_000004 Clearance No.: BRTSYS#012
Appendix C –Revision History
Document Title: LDSBus pH Sensor Adapter Datasheet
Document Reference No.: BRTSYS_000004
Clearance No.: BRTSYS#012
Product Page: https://brtsys.com/ldsbus/
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Revision
Changes
Date
Version 1.0
Initial Release
18-11-2021
Version 1.1
Updated release under BRT Systems
15-09-2022