METER BARO Module

BARO INTEGRATOR GUIDE

د سینسر توضیحات

The BARO Module is a precise barometer to compensate for matric potential measurements of TEROS 31 and TEROS 32 tensiometers. The BARO Module can be used as a standalone sensor to compensate one or more tensiometers at a measuring site, or as a digital/analog converter to compensate a connected TEROS 31 or TEROS 32 value and convert the SDI-12 signal into an analog voltage output (only 8-pin version). The BARO Module and TEROS 32 combination can be used as a T8 tensiometer replacement. For a more detailed description of how this sensor makes measurements, refer to the BARO Module User Manual.

غوښتنلیکونه

• Barometric pressure measurement
• Barometric compensation of matric potential measurements
• Digital/analog converter for directly connected TEROS 31 and TEROS 32 tensiometers
• Appropriate for non-METER data loggers to connect TEROS 31 and TEROS 32

اډوانTAGES

• ډیجیټل سینسر په سیریل انٹرفیس کې ډیری اندازه کولو سره اړیکه نیسي
• د ټیټ انپټ حجمtage اړتیاوې
• د ټیټ بریښنا ډیزاین د بیټرۍ چلونکي ډیټا لوګر ملاتړ کوي
• SDI-12, Modbus RTU or tensio LINK serial communications protocol supported
• Analog output supported (only 8-pin version)

مشخصات

د اندازه کولو مشخصات
بارومیتریک فشار
رینج	+ 65 kPa to +105 kPa
قرارداد	± 0.0012 kPa
دقت	± 0.05kPa
د حرارت درجه
رینج	-30 تر + 60 سانتي ګراد
قرارداد	± 0.01 °C
دقت	± 0.5 °C
د مخابراتو مشخصات
محصول
Analog Output (8-pin connector only)0 to 2,000 mV (default)0 to 1,000 mV (configurable with tensio VIEW)
Digital OutputSDI-12 communications protocol tensio LINK communication protocol Modbus RTU communication protocol
د ډیټا لوګر مطابقت
Analog Output Any data acquisition system capable of switched 3.6- to 28-VDC excitation and single-ended or differential voltage measurement at a greater than or equal to 12-bit resolution.
Digital Output Any data acquisition system capable of 3.6- to 28-VDC excitation and RS-485 Modbus or SDI-12 communication.
فزيکي مشخصات
ابعاد
اوږدوالی	80 ملي متره (3.15 انچه)
عرض	29 ملي متره (1.14 انچه)
لوړوالی	30 ملي متره (1.18 انچه)
د کیبل اوږدوالی
1.5 m (standard)NOTE: Contact Customer Support if a nonstandard cable length is needed.
د نښلونکي ډولونه
4-pin and 8-pin M12 plug connector or stripped and tinned wires
موافقت
EM ISO/IEC 17050:2010 (CE مارک)

مساوي سرکټ او د ارتباط ډولونه
Refer to Figure 2 to connect the BARO Module to a data logger. Figure 2 provides a low-impedance variant of the recommended SDI-12 specification.

BARO MODULE INTEGRATOR GUIDE

وقایې

د میټر سینسرونه په لوړو معیارونو جوړ شوي، مګر ناوړه ګټه اخیستنه، ناسم محافظت، یا ناسم نصب ممکن سینسر ته زیان ورسوي او احتمالي تضمین باطل کړي. د سینسر شبکې کې د سینسرونو ادغام دمخه، د نصب کولو وړاندیز شوي لارښوونې تعقیب کړئ او د زیان رسونکي مداخلې څخه د سینسر ساتلو لپاره محافظت پلي کړئ.

د سینسر ارتباطات
METER digital sensors feature a serial interface with shared receive and transmit signals for communicating sensor measurements on the data wire. The sensor supports SDI-12, tensio LINK, and Modbus over RS-485 two-wire. The sensor automatically detects the interface and protocol which is being used. Each protocol has implementation advantages and challenges. Please contact METER Customer Support if the protocol choice for the desired application is not obvious.

• د SDI-12 پیژندنه
  SDI-12 د معیارونو پراساس پروتوکول دی چې د ډیټا لوګرانو او ډیټا ترلاسه کولو تجهیزاتو ته د سینسرونو مداخله کولو لپاره. ډیری سینسرونه د ځانګړي پتې سره کولی شي یو عام 3-تار بس (بریښنا، ځمکه، او ډاټا) شریک کړي. د سینسر او لوګر ترمینځ دوه اړخیزه اړیکه د لیږد او ترلاسه کولو لپاره د ډیټا لاین شریکولو سره ممکنه ده لکه څنګه چې د معیار لخوا تعریف شوي. د سینسر اندازه کول د پروتوکول کمانډ لخوا رامینځته کیږي. د SDI-12 پروتوکول په بس کې د هر سینسر لپاره ځانګړي الفانومریک سینسر پتې ته اړتیا لري ترڅو د ډیټا لوګر کولی شي قوماندې واستوي او د ځانګړي سینسر څخه لوستل ترلاسه کړي.
  د SDI-12 پروتوکول په اړه د نورو معلوماتو لپاره د SDI-1.3 مشخصات v12 ډاونلوډ کړئ.
• RS-485 INTRODUCTION
  RS-485 is a robust physical bus connection to connect multiple devices to one bus. It is capable of using very long cable distances under harsh environments. Instead of SDI-12, RS-485 uses two dedicated wires for the data signal. This allows the use of longer cables and is more insensitive to interference from outside sources, since the signal is related to the different wires, and supply currents do not influence the data signal. See Wikipedia for more details on RS-485.
• TENSIOLINK RS-485 INTRODUCTION
  tensioLINK is a fast, reliable, proprietary serial communications protocol that communicates over the RS-485 interface. This protocol is used to read out data and configure features of the device. METER provides a tensioLINK PC USB converter and software to communicate directly with the sensor, read out data, and update the firmware. Please contact Customer Support for more information about tensioLINK.
• MODBUS RTU RS-485 INTRODUCTION
  Modbus RTU is a common serial communications protocol used by Programmable Logic Controllers (PLCs) or data loggers to communicate with all kinds of digital devices. The communication works over the physical RS-485 connection. The combination of RS-485 for the physical connection and Modbus as serial communications protocol allows fast and reliable data transfer for a high number of sensors connected to one serial bus wire. Use the following links for more Modbus information: Wikipedia and modbus.org.
• د کمپیوټر سره د سینسر مداخله
  The serial signals and protocols supported by the sensor require some type of interface hardware to be compatible with the serial port found on most computers (or USB-to-serial adapters). There are several
  SDI-12 interface adapters available in the marketplace; however, METER has not tested any of these interfaces and cannot make a recommendation as to which adapters work with METER sensors. METER data loggers and the ZSC handheld device can operate as a computer-to-sensor interface for making on-demand sensor measurements.
  The BARO Module can also be configured and measured via tensioLINK using METER software tensioVIEW, available to download at meter.ly/software. To connect a BARO Module to a computer a tensioLINK USB converter and a suitable adapter cable is necessary.
• د میټر SDI-12 پلي کول
  If a BARO Module is connected between a TEROS 31 or 32 tensiometer, both the barometric air pressure and the absolute pressure of the TEROS tensiometer can be read out via Modbus. The compensated matrix potential can be read out via Modbus as well.
  METER sensors use a low-impedance variant of the SDI-12 standard sensor circuit (Figure 2). During the power-up time, sensors output some sensor diagnostic information and should not be communicated with until the power-up time has passed. After the power up time, the sensors are fully compatible with all commands listed in the SDI-12 Specification v1.3 except for the continuous measurement commands ( aR0 – aR9 and aRC0 – aRC9 ). M , R , and C command implementations are found on pages 8–9. Out of the factory, all METER sensors start with SDI-12 address 0 .
• د سینسر بس غورونه
  SDI-12 sensor buses require regular checking, sensor upkeep, and sensor troubleshooting. If one sensor goes down, that may take down the whole bus even if the remaining sensors are functioning normally. Power cycling the SDI-12 bus when a sensor is failing is acceptable. METER SDI-12 sensors can be power-cycled and read on the desired measurement interval or powered continuously and commands sent when a measurement is desired based on specified communication timing. Many factors influence the effectiveness of the bus configuration. Visit metergroup.com د مقالو او مجازی سیمینارونو لپاره چې نور معلومات لري.

د SDI-12 ترتیب

جدول 1 د SDI-12 ارتباطي ترتیب لیست کوي.

میز 1      د SDI-12 ارتباطي ترتیب
د بوډ نرخ	1,200
بیټس پیل کړئ	1
ډیټا بټس	7 (لومړی LSB)
د پارټي بیټونه	1 (حتی)
بټس ودروئ	1
منطق	بدل شوی (فعال ټیټ)

د SDI-12 وخت
All SDI-12 commands and responses must adhere to the format in Figure 9 on the data line. Both the command and response are preceded by an address and terminated by a carriage return and line feed combination ( <CR><LF> ) and follow the timing shown in Figure 10.

عام SDI-12 امرونه
پدې برخه کې د عام SDI-12 کمانډونو جدولونه شامل دي چې ډیری وختونه په SDI-12 سیسټم کې کارول کیږي او د METER سینسرونو ورته ځوابونه.

د پیژندنې قومانده (ai!)
د پیژندنې کمانډ د وصل شوي سینسر په اړه مختلف تفصيلي معلوماتو ترلاسه کولو لپاره کارول کیدی شي. یو پخوانیampد کمانډ او ځواب le په Ex کې ښودل شویample 1، چیرته چې کمانډ په بولډ کې وي او ځواب د قوماندې تعقیبوي.

Example 1 1I!113METER␣ ␣ ␣BARO␣

پیرامیټر	ثابت کرکټر  اوږدوالی	تفصیل
۱ زه!	3	Data logger command.Request to the sensor for information from sensor address 1 .
1	1	Sensor address.Prepended on all responses, this indicates which sensor on the bus is returning the following information.
13	2	په ګوته کوي چې هدف سینسر د SDI-12 مشخصاتو v1.3 ملاتړ کوي.
METER ␣ ␣ ␣	8	Vendor identification string.( METER and three spaces  ␣ ␣ ␣ for all METER sensors)
BARO␣	6	Sensor model string.This string is specific to the sensor type. For the BARO, the string is BARO .
100	3	Sensor version.This number divided by 100 is the METER sensor version (e.g., 100 is version 1.00).
BARO-00001	≤13,variable	د سینسر سیریل نمبر. دا د متغیر اوږدوالی ساحه ده. دا ممکن د زړو سینسرونو لپاره پریښودل شي.

د پته کمانډ بدل کړئ (aAB!)
The Change Address command is used to change the sensor address to a new address. All other commands support the wildcard character as the target sensor address except for this command. All METER sensors have a default address of 0 (zero) out of the factory. Supported addresses are alphanumeric (i.e., A – Z , and 0 – 9 ). An exampد میټر سینسر څخه لی محصول په Ex کې ښودل شویample 2، چیرته چې کمانډ په بولډ کې وي او ځواب د قوماندې تعقیبوي.

Example 2 1A0!0

پیرامیټر	ثابت کرکټر  اوږدوالی	تفصیل
1A0!	4	Data logger command. Request to the sensor to change its address from 1 to a new address of 0 .
0	1	نوی سینسر پته. د ټولو راتلونکو امرونو لپاره، دا نوی پته به د هدف سینسر لخوا کارول کیږي.

د قوماندې پلي کول
لاندې جدولونه د اړونده اندازه کولو (M)، دوامداره (R)، او همغږي (C) کمانډونه او د اړتیا په وخت کې د ډیټا (D) کمانډونه لیست کوي.

د اندازه کولو امرونه پلي کول
Measurement ( M ) commands are sent to a single sensor on the SDI-12 bus and require that subsequent Data ( D ) commands are sent to that sensor to retrieve the sensor output data before initiating communication with another sensor on the bus. Please refer to Table 2 and for an explanation of the command sequence and to Table 5 for an explanation of response parameters.

میز 2 بجې! د امر ترتیب

امر	ځواب
دا کمانډ اوسط، جمع شوي، یا اعظمي ارزښتونو راپور ورکوي.
am!	atttn
aD0!	a± ± +
تبصرې	When a slave TEROS tensiometer is connected, <Press> hold the barometric compensated tensiometer output. If the BARO module is used in standalone <Press> returns the current barometric pressure.
NOTE: The measurement and corresponding data commands are intended to be used back to back. After a measurement command is processed by the sensor, a service request a <CR><LF> is sent from the sensor signaling the measurement is ready. Either wait until   seconds have passed or wait until the service request is received before sending the data commands. See the SDI-12 Specifications v1.3

NOTE: The measurement and corresponding data commands are intended to be used back to back. After a measurement command is processed by the sensor, a service request a <CR><LF> is sent from the sensor signaling the measurement is ready. Either wait until ttt seconds have passed or wait until the service request is received before sending the data commands. See the SDI-12 Specifications v1.3 document for more information.

د همغږۍ اندازه کول د پلي کولو امرونه
Concurrent Measurement ( C ) commands are typically used with sensors connected to a bus. C commands for this sensor deviate from the standard C command implementation. First, send the C command, wait the specified amount of time detailed in the C command response, and then use D commands to read its response prior to communicating with another sensor.

Please refer to Table 3 for an explanation of the command sequence and to Table 5 for an explanation of response parameters.

	Table 3      aC! measurement command sequence
امر	ځواب
دا کمانډ د فوري ارزښتونو راپور ورکوي.
aC!	atttnn
aD0!	a± ± +
NOTE: The measurement and corresponding data commands are intended to be used back to back. After a measurement commanc is pro- cessed by the sensor, a service request a<CR><LF> is sent from the sensor signaling the measurement is ready. Either wait until ttt sec- onds have passed or wait until the service request is received before sending the data commands. Please see the SDI-12 Specifications v1.3 document for more information.

NOTE: The measurement and corresponding data commands are intended to be used back to back. After a measurement commanc is pro-cessed by the sensor, a service request a<CR><LF> is sent from the sensor signaling the measurement is ready. Either wait until ttt sec-onds have passed or wait until the service request is received before sending the data commands. Please see the SDI-12 Specifications v1.3 document for more information.

د دوامداره اندازه کولو امرونه پلي کول
Continuous Measurement ( R ) commands trigger a sensor measurement and return the data automatically after the readings are completed without needing to send a D command. aR0! returns more characters in its response than the 75-character limitation called out in the SDI-12 Specification v1.3. It is recommended to use a buffer that can store at least 116 characters.
Please refer to Table 4 for an explanation of the command sequence and see Table 5 for an explanation of response parameters.

	Table 4      aR0! measurement command sequence
امر	ځواب
دا کمانډ اوسط، جمع شوي، یا اعظمي ارزښتونو راپور ورکوي.
aR0!	a± ± +
NOTE: This command does not adhere to the SDI-12 response timing. See METER SDI-12 Implementation for more information.

NOTE: This command does not adhere to the SDI-12 response timing. See METER SDI-12 Implementation for more information.

پیرامیټرونه
Table 5 lists the parameters, unit measurement, and a description of the parameters returned in command responses for the BARO Module.

		میز 5      د پیرامیټر توضیحات
پیرامیټر	واحد	تفصیل
±	-	مثبت یا منفي نښه د راتلونکي ارزښت نښه نښه کوي
a	-	د SDI-12 پته
n	-	د اندازه کولو شمیر (د 1 ټاکل شوی پلنوالی)
nn	-	د مخکینۍ صفر سره د اندازه کولو شمیر که اړتیا وي (د 2 ټاکل شوی پلنوالی)
ttt	s	اعظمي اندازه اندازه کول به وخت ونیسي (د 3 ټاکل شوی پلنوالی)
	-	د ټب کرکټر
	-	د ګاډي بیرته راستنیدو کرکټر
	-	د کرښې فیډ کرکټر
	-	ASCII character denoting the sensor type For BARO Module, the character is ;
	-	د METER سیریل چیکسم
	-	METER 6-bit CRC

METER MODBUS RTU SERIAL IMPLEMENTATION
Modbus over Serial Line is specified in two versions – ASCII and RTU. BARO Modules communicate using RTU mode exclusively. The following explanation is always related to RTU. Table 6 lists the Modbus RTU communication and configuration.

میز 6      Modbus communication characters
د بوډ کچه (bps)	9,600 bps
بیټس پیل کړئ	1
ډیټا بټس	8 (لومړی LSB)
د پارټي بیټونه	0 (هیڅ نه)
بټس ودروئ	1
منطق	معیاري (فعال لوړ)

Figure 11 shows a message in RTU format. The size of the data determines the length of the message. The format of each byte in the message has 10 bits, including Start and Stop Bit. Each byte is sent from left to right: Least Significant Bit (LSB) to Most Significant Bit (MBS). If no parity is implemented, an additional stop bit is transmitted to fill out the character frame to a full 11-bit asynchronous character.

The Modbus application layer implements a set of standard Function codes divided into three categories: Public, User-defined, and Reserved. Well-defined public function codes for BARO Modules are documented in the Modbus Organization, Inc. (modbus.org) community.

For a reliable interaction between the BARO Module and a Modbus Master, a minimum 50ms delay is required between every Modbus command sent on the RS-485 bus. An additional timeout is needed for every Modbus query; this timeout is device-specific and depends on the quantity of the polled registers. Generally, 100ms will work fine for most of the BARO Module.

SUPPORTED MODBUS FUNCTIONS

Table 7 Function Definitions

فعالیت کوډ	عمل	تفصیل
01	Read coil/port status	Reads the on/off status of discrete output(s) in the ModBusSlave
02	د ننوتلو حالت ولولئ	Reads the on/off status of discrete input(s) in the ModBusSlave
03	د ساتلو راجسترونه ولولئ	Reads the binary contents of holding register(s) in the ModBusSlave
04	د ننوتلو راجسترونه ولولئ	Reads the binary contents of input register(s) in the ModBusSlave
05	Force single coil/port	Forces a single coil/port in the ModBusSlave to either on or off
06	واحد راجستر ولیکئ	Writes a value into a holding register in the ModBusSlave
15	Force multiple coils/ports	Forces multiple coils/ports in the ModBusSlave to either on or off
16	ډیری راجسترونه ولیکئ	Writes values into a series of holding registers in the ModBusSlave

DATA REPRESENTATION AND REGISTER TABLES
Data values (setpoint values, parameters, sensor-specific measurement values, etc.) sent to and from the BARO Module use 16-bit and 32-bit holding (or input) registers with a 4-digit address notation. The address spaces are virtually distributed in different blocks for each data type. This is an approach to the Modbus Enron implementation. Table 8 shows the four main tables used by the BARO Module with their respective access rights. Table 9 describes the sub-blocks for each different data type representation.

Please note that some Modbus dataloggers use addressing with a +1 offset. This sometimes causes confusion and is based on a Modbus specification void. If there are problems in implementing your Modbus program on the datalogger always try testing different register offsets and data types. Using a known value, like temperature, where it’s known what value to expect is a good practice to start testing.

Table 8      Modbus Primary Tables
د راجستر شمیره	د جدول ډول	لاسرسی	تفصیل
1xxx	د جلا تولید کویلونه	لوستل / لیکل	on/off status or setup flags for the sensor
2xxx	جلا جلا اړیکې	لوستل	sensor status flags
3xxx	د انلاګ ان پټ راجسترونه	لوستل	numerical input variables from the sensor (actual sensor measurements)
4xxx	Analog Output Holding Registers	لوستل / لیکل	numerical output variables for the sensor (parameters, setpoint values, calibrations etc.)

د مثال لپارهample, register 3001 is the first analog input register (first data address for the input registers). The numeric value stored here would be a 16-bit unsigned integer-type variable that represents the first sensor measurement parameter (pressure value). The same measurement parameter (pressure value) could be read at register 3201, but this time as a 32-bit floating-point value with a Big-Endian format. If the Modbus Master (Datalogger or a PLC) supports only 32-bit float-values with a Little-Endian format, then one could read the same measurement parameter (same pressure value) at register 3301. The Virtual Sub-Blocks are meant to simplify the user’s effort in programming the Modbus query of the sensors.

میز 9      Modbus Virtual Sub-Blocks
د راجستر شمیره	لاسرسی	اندازه	Sub-Table ډاټا ډول
X001-X099	لوستل / لیکل	16 بټ	لاسلیک شوی عدد
X101-X199	لوستل / لیکل	16 بټ	نه لاسلیک شوی عدد
X201-X299	لوستل / لیکل	32 بټ	float Big-Endian format
X301-X399	لوستل / لیکل	32 بټ	float Little-Endian format

REGISTER MAPPING

	میز 10      د راجسترونو ساتل
41000 (41001*)	د موډبس غلام پته
تفصیلي توضیحات	Read or update the sensor’s modbus address
د معلوماتو ډول	نه لاسلیک شوی عدد
اجازه ورکړل شوی حد	۲۲۰ – ۲۴۰
واحد	–
تبصرې	Updated slave address will be stored in the sensor’s nonvolatile memory

	میز 11      BARO Module Input Registers
32000 (32001*)	Soil Water Potential
تفصیلي توضیحات	Compensated tension value from tensiometer
د معلوماتو ډول	32 bit floating Big-Endian
اجازه ورکړل شوی حد	-200 تر +200 پورې
واحد	kPa
تبصرې	Tensiometer needs to be connected as slave
32001 (32002*)	د خاورې حرارت يا تودوخه
تفصیلي توضیحات	High accuracy on board temperature measurement
د معلوماتو ډول	32 bit floating Big-Endian
اجازه ورکړل شوی حد	-30 تر +60 پورې
واحد	degC
تبصرې	Tensiometer needs to be connected as slave
32002 (32003*)	د سینسر رسولو حجمtage
تفصیلي توضیحات	On board supply voltage اندازه کول
د معلوماتو ډول	32 bit floating Big-Endian
اجازه ورکړل شوی حد	-10 تر +60 پورې
واحد	وولټونه
تبصرې	–
32003 (32004*)	بارو حالت
تفصیلي توضیحات	Binary status
د معلوماتو ډول	32 bit floating Big-Endian
اجازه ورکړل شوی حد	۹/۹۷
واحد	–
تبصرې	–
32004 (32005*)	BARO Reference Pressure
تفصیلي توضیحات	On board high accuracy barometric pressure measurement
د معلوماتو ډول	32 bit floating Big-Endian
اجازه ورکړل شوی حد	له +70 څخه تر +120 پورې
واحد	kPa
تبصرې	–

Table 11 Baro Module Input Registers (continued)
32005 (32006*)	ټینسیومیټر فشار
تفصیلي توضیحات	Absolute pressure value from tensiometer
د معلوماتو ډول	32 bit floating Big-Endian
اجازه ورکړل شوی حد	-200 تر +200 پورې
واحد	kPa
تبصرې	Tensiometer needs to be connected as slave
32006 (32007*)	بارو د حرارت درجه
تفصیلي توضیحات	On board temperature measurement
د معلوماتو ډول	32 bit floating Big-Endian
اجازه ورکړل شوی حد	-30 تر +60 پورې
واحد	degC
تبصرې	–

*Some devices report Modbus register addresses with an offset of +1. This is true for Campbell Scientific Loggers and Dataker loggers. In order to read the desired register use the number in the parenthesis.

EXAMPLE USING A CR6 DATALOGGER AND MODBUS RTU
د سيampbell Scientific, Inc. CR6 Measurement and Control Datalogger supports Modbus master and Modbus slave communication to integrate Modbus SCADA networks. The Modbus communications protocol facilitates the exchange of information and data between a computer/HMI software, instruments (RTUs), and Modbus-compatible sensors. The CR6 datalogger communicates exclusively in RTU mode. In a Modbus network, each slave device has a unique address. Therefore, sensor devices must be configured correctly before connecting to a Modbus Network. Addresses range from 1 to 247. Address 0 is reserved for universal broadcasts.

PROGRAMMING A CR6 DATALOGGER
The Programs running on the CR6 (and CR1000) Loggers are written in CRBasic, a language developed by Campbell Scientific. It is a high-level language designed to provide an easy yet extremely flexible and powerful method of instructing the data logger how and when to take measurements, process data, and communicate. Programs can be created using either the ShortCut Software or edited using the CRBasic Editor, both of which are available for downloading as stand-alone applications on the official Campبیل ساینسي webسایټ (www.campbellsci.com). ShortCut Software (https://www.campbellsci.com/shortcut) CRBasic Editor (https://www.campbellsci.com/crbasiceditor)

A typical CRBasic program for a Modbus application consists of the following:

• Variables and constants declarations (public or private)
• Units declarations
• د شکل کولو پیرامیټونه
• Data tables declarations
• Logger Initializations
• Scan (Main Loop) with all the sensors to be quired
• Function call to the Data Tables

CR6 LOGGER RS-485 CONNECTION INTERFACE
The universal (U) terminal of the CR6 offers 12 Channels that connect to nearly any sensor type. It gives the CR6 the ability to match more applications and eliminates the use of many external peripherals.
The Modbus CR6 connection shown in Figure 12 uses the RS-485 (A/B) interface mounted on terminals (C1-C2) and (C3-C4). These interfaces can operate in Half-Duplex and Full-Duplex. The serial interface of the BARO Module used for this example is connected to (C1-C2) terminals.

BARO Module to CR6 Datalogger Wiring Diagram

After assigning the BARO Module a unique Modbus Slave Address, it can be wired to the CR6 logger according to Figure 12. Make sure to connect the white and black wires according to their signals, respectively, to the C1 and C2 ports—the brown wire to 12V (V+) and the blue to G (GND). To control the power supply through your program, connect the brown wire directly to one of the SW12 terminals (switched 12V outputs).

EXAMPLE پروګرامونه

د پیرودونکي ملاتړ

شمالی امریکا
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بیاکتنه	نیټه	مطابقت لرونکی فرم ویئر	تفصیل
00	6.2025	1.10	ابتدايي خوشې کول

FAQ

What should I do if I need a nonstandard cable length?

Contact Customer Support for assistance with nonstandard cable lengths.

How do I know which communication protocol to use for my application?

Evaluate the advantages and challenges of each protocol based on your application needs. If unsure, contact METER Customer Support for guidance.

اسناد / سرچینې

METER BARO Module [pdf] د کارونکي لارښود TEROS 31, TEROS 32, BARO Module, BARO Module, Module

حوالې

• د کارن لارښود