Embedded data systems Mn-rtd4w-h User manual

MeshNet Wireless Dual Channel 4 Wire RTD Input

MN-RTD4W-H

EDS-2030

EN-USERMAN MN-RTD4W-H V1.0 10.09.2020

http://www.EmbeddedDataSystems.com

FEATURES

•Wireless communication over the widely accepted 2.4 GHz frequency band

•High power radio 1200 meters (10x Gen 1 MN-ENV Radio)

•Buffer stores up to 2048 readings with time stamps

•Highly accurate (±0.1°C) and precise 4 Wire RTD probes readings

•RTD fault detection

•Programmable user friendly name & transmission rate

•Globally unique 64-Bit EUI (Extended Unique Identifier)

•Supports repeaters enlarging the wireless network and providing additional

transmission routes for the sensor data

•Transmission strength reported on all devices, allowing troubled areas to be

identified and addressed proactively (e.g. adding Repeaters)

•Robust Communication protocol includes acknowledgements and retries

•Energy efficient design optimizes battery life

•Low battery buffer only mode

•Optional pole mounting kit

•Applications include monitoring laboratory equipment and cooking processes

•Complies with FCC, Industry Canada and CE Marking requirements

DESCRIPTION

The MeshNet Wireless Dual Channel 4 Wire RTD Input Gen 2, MN-RTD4W-H, offers an innovative way to monitor

up to two 4-Wire RTD temperature probes. The RTD Input provides highly accurate and precise readings from the

RTD probes. The product also contains a memory buffer capable of holding 2048 sets of sensor readings, a high

power radio with 10x Gen 1 sensor’s transmission range, RTD fault detection, and screw-down terminals. Together

these features offer an efficient and flexible system for monitoring wide temperature ranges from -200 to 800°C (RTD

dependent) the temperature at multiple indoor and outdoor locations.

Part Numbers

Description

MOQ

MN-RTD4W-H

Two 4-Wire RTD Connections with Battery Power

MN-RTD4W-H-PLUG

Two 4-Wire RTD Connections Plugin Power with Battery Power Backup

SYSTEM DESCRIPTION

The MeshNet RTD Input is part of the MeshNet Wireless Sensor Ecosystem, designed to wirelessly monitor and control

real world environmental conditions. The system is completed with the Embedded Data Systems MeshNet Controller

(MN-CTRL). The controller communicates directly with the MeshNet RTD Input and presents all data via Ethernet. The

MeshNet RTD Input and Controller communicate with each other using a proprietary protocol. An optional system

component is Embedded Data Systems' MeshNet Repeater (MN-RPT-H) which is used to extend the range of

communication between the Controller and Sensor Nodes.

Controller: Each wireless system contains a MeshNet Controller. The Controller interfaces the wireless system to a local

area network (LAN) or the Internet via Ethernet. It manages, reads/writes to the wireless devices, presents the data in

easy to use formats such as HTTP and XML, and optionally pushes the data on a timed basis and/or per reception of

wireless sensor packet to a HTTP Post server.

Repeater: Repeaters are used to extend the distance a Sensor Node can be located from the Controller. Many Sensor

Nodes can communicate with the Controller through a single Repeater. Each Controller can manage up to 7 Repeaters,

and there can be 1 Repeater between a Controller and Sensor Node.

EN-USERMAN MN-RTD4W-H V1.0 10.09.2020

Sensor Nodes:The MeshNet Sensor Nodes provide the means to monitor and control real world environmental

conditions. They are typically battery-powered devices that wake on a timed basis, take readings, send the readings to the

controller, confirm successful transmission, and check to see if any data is waiting for them. Sensor Nodes currently exist

for monitoring: Temperature (Ambient & Stainless Steel Probes), Humidity, Light, Pressure, RTDs, 4-20mA, and 0-10V

Sensors.

INSTALLING 4-WIRE RTD

Inside the RTD Input’s packaging you will find 2 AA batteries along with a hardware bag including four screws, 2 cable

grommets for the RTDs, 1 grommet which outlines the perimeter of the enclosure, and a plastic plug.

1. Remove the lid of the enclosure and insert the rubber grommet along the grooves along the perimeter of the lid

where the board is mounted.

2. Insert the cable grommets in the holes where an RTD will be installed. If only one probe will be installed, insert

the provided plug in the unused hole.

3. Insert the RTD’s 4 wire leads through the cable grommet.

4. Detach the vertically installed screw-down terminal and note the orientation.

5. Connect the probe’s leads to the screw-down terminal.

a. Red wires are connected to pins 1 & 2 (“+” in the wiring chart).

b. White wires are connected to pins 3 & 4 (“-” in the wiring chart).

6. Reinstall screw-down terminal with the vertical orientation with the screw heads pointing away from the batteries.

7. Insert the two AA batteries provided, upon insertion a red LED will flash rapidly indicating that the sensor is now in

an active state.

8. Close the enclosure making sure that the screw down terminal is on the opposite side of the cable grommet to

improve wireless performance by keeping the cables away from the wireless antenna.

9. Lightly pull the cable to remove excess cabling from within the enclosure.

10. Take the 4 screws included in your hardware bag and secure the lid to the base by firmly screwing the enclosure

from the bottom of the base.

11. Sensor is now ready to be linked.

LINKING INSTRUCTIONS

1. Go to MeshNet Controller’s homepage and select System Configuration>Devices.

2. Insert batteries (if not installed during the RTD installation) into sensor’s battery holder.

3. Select the sensor when it appears1on the “Unlinked Devices” section of the MeshNet Controllers page.

4. Click “OK” on the popup to link the sensor to the Controller.

5. Confirmed sensor moves to “Linked Devices” section. This may take up to 1 minute or longer2.

OPERATION

All data from the MeshNet Sensors are read using a MeshNet Controller. The MeshNet Controller makes the data

available in a number of ways which include HTTP GET, HTTP POST, and TCP Access. Buffered data is only made

available through the HTTP POST interface. See the MeshNet Controller User’s Manual for more information.

PrimaryValue

This is likely the most important value for users of the deployed sensors. The MN-RTD-H’s primary value would be

Probe1Value denoted in the following format “xxx.xxx Deg C”.

RTD1Temperature, RTD2Temperature

Current temperature readings, displayed with 0.001 °C resolution. -250°C indicates the probe is not connected.

Temperature calculations

1A factory reset may be necessary if the device was previously linked to a different Controller and wasn’t unlinked.

2The sensor will respond when its next transmission is made.

EN-USERMAN MN-RTD4W-H V1.0 10.09.2020

RTD1Ohms, RTD2Ohms

Current Ohms readings, displayed in 0.001Ωresolution.A reading of 0Ωindicates the probe is not connected.

RTD1Fault, RTD2Fault

Identifies RTD wiring issues. “0” is good. A reading of “1” indicates a problem.

TimeStamp

The date and time when the temperature readings are taken.

Battery

Displays voltage of the battery.

PowerSource

A special order variant is available that allows the RTD Input to be powered by inline or battery power. A reading of “1”

indicates battery power. A reading of “0” indicates currently receiving inline power.

OPERATIONAL PARAMETERS

Name

The Name or ID used to indicate the sensor model in the Controller. A list of the current IDs is available at the EDS

Environmental Sensor IDs section.

EUI

The EUI, or Extended Unique Identifier, is a globally unique 64-bit number, represented by 16 hexadecimal digits. This

number can be used by software to uniquely identify every MeshNet wireless device.

ControllerRSSI

This indicates the strength of the radio signal at the controller; higher numbers equate to stronger signals. Due to

hardware limitations, the highest number that can be displayed is -34 dBm. However, the actual signal strength may be

much higher.

DeviceRSSI

This indicates the strength of the radio signal at the sensor. Due to hardware limitations, the highest number that can be

displayed is -34 dBm, however the actual signal strength may be much higher.

Address

This is the address of the sensor, which was assigned by the controller.

Repeater

When the repeater joins the controller, it is assigned a repeater number, which is displayed here. A zero indicates there is

no repeater in the communication path.

Health

This is a number ranging from 0 to 7; 0 is not connected and 7 is healthy. The number is incremented when a packet is

received from the repeater and decremented when two packets are not received after a predetermined period of time.

Numbers less than 7 other indicate a weak3wireless link or other problem.

Version

This indicates the firmware version of the sensor.

UserName

The user programmable string used to identify any given Sensor; it may be up to 29 characters long. It is saved in non-

volatile memory so it is retained even when power is cycled. The string is best used as a human readable label, which can

uniquely identify each MeshNet RTD Input.

3During initial configuration readings below 7

EN-USERMAN MN-RTD4W-H V1.0 10.09.2020

ReadCounter

Counts the number of times a packet has been sent to the controller. This number has a maximum of 4294967296. When

the maximum is reached, the number rolls back to 0 and begins counting up again.

SensorReadPeriod

Used to define frequency the current sensor readings are transmitted. Larger periods

between transmissions will conserve battery power.

At power up, the device sends data packets every 10 seconds for the first 6 packets. After the

first 6 packets are sent, the device reverts to sending packets at the Read / Send Data setting

(1 minute buy default). This is to facilitate programming in cases where a long read period is

desired. Even with very long read periods, simply cycling the power4will cause parameters to

be written without having to wait for the sensor read period to time out.

BufferState

It is used to indicate whether the data packet was buffered by the sensor prior to successfully

transmitting the data to the Controller. “0” indicates the data wasn’t buffered by the sensor.

“1” Indicates the data was stored in the sensor’s buffer.

BufferHeadPointer

Indicates the most recent packet held in the buffer.

BufferTailPointer

It indicates the oldest unsent buffered packet in the buffer.When the BufferHeadPointer and

BufferTailPointer are the same, the buffer is empty.

RTD1ValueCalibration, RTD2ValueCalibration

It contains the factory calibration for the input channels.

Factory Reset

Web (soft reset)

Writing anything to the <FactoryReset> location will return all parameters except for the <UserName> and the

Network Key to factory defaults. This parameter is not sent from the sensor to the controller so no data is

presented.

Short (hard reset)

All parameters can be reset by shorting the two circled pads

labeled “RESET” together for 4 seconds5.The LED will blink

rapidly once the reset is triggered. Please note the factory reset

will move the sensor to its unlinked state.

WRITE PARAMETERS

In order to conserve power, MeshNet sensors sleep when not reading the

sensors or sending data. When sleeping, they cannot receive wireless

data. Because of this, writes are queued by the MeshNet Controller and sent when the Sensors are awake.

Writes Pending

The number of writes waiting to be sent to the sensor.

Writes Succeeded

The number of writes that have been received and acknowledged by the sensor.

4Power should be removed for 30 seconds to ensure immediate transmission.

5Shorting the “Reset” pads briefly (less than 4 seconds) will trigger a sensor transmission.

Configuration Options

Setting

Period

5 seconds

10 seconds

15 seconds

30 seconds

1 minute

2 minutes

5 minutes

10 minutes

15 minutes

30 minutes

1 hour

EN-USERMAN MN-RTD4W-H V1.0 10.09.2020

Writes Failed

The number of writes that were not able to be sent to the sensor or were not acknowledged.

WIRELESS COMMUNICATIONS

The device communicates at 2.4 GHz via an industry standard 802.15.4 wireless link. Wireless packets are

acknowledged, all data is checked for errors using CRC and corrupted data is resent.

DIAGNOSTIC PARAMETERS

The following parameters are provided for diagnostic purposes. Wireless communications are acknowledged and retried if

no acknowledgment is received. The parameters below can be used to determine link quality. Wireless performance can

be improved with the introduction of MeshNet Repeaters within the wireless network. The repeaters provide sensors

additional paths to the controller. Sensors will continue to use an established path until a failed transmission.

ConnectionCounter

Counts the number of connections made to the controller. When a device is first powered, it connects to a controller,

obtaining an address and thus belonging to the network. If the signal strength is good and power is not lost at the

controller, this number will stay low. A high number could be due to low signal strength, periodic interference or power

problems. Maximum is 65535, after which it no longer increments until the counter is reset.

MessageAttempts

The number of packets attempted to have been sent. It can be reset and has a maximum of 65535, after which it no

longer increments until the counter is reset.

MessagePacketRetries

The number of times wireless packets had to be resent due to no acknowledgment being received. The maximum is

65535, after which it no longer increments until the counter is reset.

MessageFailures

When no acknowledgment is received, the packet is resent. After 4 retries, the message has failed. The counter

increments when a failure has occurred. The maximum is 65535, after which it no longer increments until the counter is

reset.

MessageCounterReset

It is used to reset the 3 message counters along with the ConnectionCounter to zero.

BUFFERED DATA

The MeshNet Wireless Dual Channel 4 Wire RTD Input Gen 2 includes a 64K byte EEPROM which is capable of storing

up to 2048 complete sets of the probe readings. To receive the buffered data from the controller, the POST Client and the

“Use Buffer” option must be enabled. Once enabled, the MeshNet Controller transmits any sensor data it receives in near

real-time. Packets received with a few seconds of each other may be bundled. The bundling will commonly occur when

multiple Gen 2 sensors are configured to the same transmission rate and when Gen 2 sensors are clearing their buffers.

The readings are buffered in two instances:

•When a sensor transmission is not acknowledged, sets of readings are stored at every send period, but attempts

to contact the controller may not happen every send period after a failed transmission. This saves battery power

when a short send period is selected. Once a connection with the controller is reestablished, the buffer is

emptied.

•When battery voltage becomes extremely low, the RTD Input will revert to a buffer only mode. This extends

battery life by avoiding consuming power for transmissions.

EN-USERMAN MN-RTD4W-H V1.0 10.09.2020

BUFFERED DATA PACKETS

The MN-RTD-H transmits two types of wireless packets:

•owd_EDS2030_Tag – This packet primarily provides the EUI of the sensor and the writeable UserName. It is

sent on a number of situations including:

oThe sensor has just connected/reconnected.

oThe UserName has been modified.

•owd_EDS2030_Data – This provides the bulk of the sensor data.

Below is a sample packet which includes:

•Controller Data in Black

•owd_EDS2030_tag in Green

•owd_EDS2030_Data in Blue

<Devices-Detail-Response>

<DeviceName>WirelessController-Enet</DeviceName>

<owd_EDS2030_Tag>

<UserName Writable="True">EDS RTD Sensor</UserName>

</owd_EDS2030_Tag>

<owd_EDS2030_Data Description="RTD Sensor with high power transceiver and power management">

<EUI>801F12FFFECB7C0C</EUI>

</owd_EDS2030_Data>

</Devices-Detail-Response>

EN-USERMAN MN-RTD4W-H V1.0 10.09.2020

PROGRAMMABLE/WRITEABLE PARAMETER SUMMARY

Parameter

Description

Limitations

UserName

User friendly name for the sensor

29 characters 0-9, A-z, and

special characters (space and “.”)

SensorReadPeriod

Selects the transmission rate (see selectable transmission

rates on page 4)

11 transmission rate options

ResetMessageCounters

Resets MessageAttempts, MessagePacketRetries, and

MessageFailures to 0.

InputSend

Enabling (set to 1) configures sensor to transmit when

scheduled and when the input state changes.

0 to 1

FactoryReset

Resets all programmable settings except UserName and

Network Key.

Only occurs if ReadCounter is

below 20.

Linked

Writing a Controller’s NetKey to the Linked Parameter has

it join the Controller’s network. The unlinked NetKey is

FFFFFFFF.

Must write an 8 digit Hexadecimal

number (0-9 & A-F).

CalibrationKey

Writing the appropriate command will calibrate to RTD

Input to 100 Ohms. Details available in the calibration

section.

BATTERY LIFE

The RTD Input spends most of its time in sleep mode; it wakes up to take readings, send data and see if any packets are

in the queue to be received. Battery life can be maximized by reading/sending the sensor data as infrequently as possible.

Battery life is highly variable on a number of parameters.

1. How often data is read/sent.

2. Extreme temperatures reduce the useful life of the battery.

3. If the sensor is sending data through a repeater, battery life will be reduced because the sensor has to wait longer

for the acknowledgment.

4. If the sensor has to reconnect to the controller frequently, battery life will be reduced. This happens when the

signal is low or there is interference.

5. Channel hopping

6. The battery chemistry will affect the performance. Lithium batteries will provide substantially better performance

especially in cold environments.

Expected battery life in normal conditions at a 1 minute transmission rate is 2+ years.

INLINE POWER (Optional with MOQ)

A RTD Input with inline power and battery backup is available for special order. A power supply capable of providing 4 to

16VDC with a right angle 2.5mm barrel connector is suggested. The battery backup is not charged by the presence of

inline power.

RTD INPUT CALIBRATION

Each input is factory calibrated to ±0.01% accuracy at 21°C. The Callendar-Van Dusen equation and calibration

performed on each reading. It has an accuracy of ± 0.1° across probes temperature (with MeshNet RTD Input at 21°C6).

6The MeshNet RTD Input may be recalibrated at temperatures significantly different than 21°C. Contact

[email protected] for more details.

EN-USERMAN MN-RTD4W-H V1.0 10.09.2020

LINKING PROCEDURE (CABLE FREE)

1. Apply power to the MeshNet Controller. The green PWR/ACT LED located on the front of the Controller will

begin to flash at one-second intervals, indicating that the product is operating normally. Power must be 5 volts +/-

10% at 400 milliamp.

2. Connect the MeshNet Controller to your Network. Connect a live network cable to the Ethernet Port on the

device. The green LED on the Ethernet connector will light, indicating a valid network connection. The yellow LED

on the Ethernet connector blinks only when there is network traffic.

3. Determine the IP address of the MeshNet Controller by checking your DHCP server logs or using EDS

Appliance Scanner Software available from the EDS website and http://short.eds.bz/apps-edsscanner. If the

MeshNet Controller does not find a DHCP server running on your network, it will default to the following IP

address: 169.254.1.1.

4. Navigate to the MeshNet Controller. Type the IP address of the MeshNet Controller into your web browser

(e.g., http://192.168.1.27) and press enter. Go to System Configuration>Devices. When the name and password

is requested, enter “admin” for the name and “eds” for the password. A page similar to below will appear:

5. Insert AA batteries into sensor.Once this is

done the sensor will appear7in the “Unlinked

Devices” section.

6. Click the unlinked sensor. A window will pop up

confirming you want to link the sensor. Click “OK”.

The sensor will move to the “Linked Devices”

section upon its next transmission. (Sensors at

power up transmit every 10 seconds for the first

minute then they move to the configured

transmission rate which is 1 minute by default.)

7. Congratulations! You have successfully installed

a MeshNet Wireless Sensor System. Please refer

to the Web Access section of the Operation Manual

to obtain an understanding of the function of each

of the web pages served by the MeshNet

Controller.

Some things to keep in mind:

•Support is provided for MeshNet Controller IP address identification only when utilizing the EDS Appliance

Scanner Software (http://short.eds.bz/apps-edsscanner). Please consult your network administrator if you cannot

locate the DHCP address.

•For instructions on appropriate placement of the components of the MeshNet Wireless Sensor System,

please refer to Proper Placement section of the Operation Manual.

7Previously linked MeshNet sensors (which were not unlinked) will not appear. A hard reset (page 4) should be

performed to move the sensor into an unlinked state.

EN-USERMAN MN-RTD4W-H V1.0 10.09.2020

EDS ENVIRONMENTAL SENSOR IDS

Features

EDS1064

Temperature

EDS1065

Temperature & humidity

EDS1066

Temperature & barometric pressure

EDS1067

Temperature & light

EDS1068

Temperature, humidity, barometric pressure, & light

EDS2030

Dual RTD Input with high power radio

EDS2033

Dual Analog Input with high power radio

EDS2040

Temperature, humidity, external probe support, memory buffer, & high power radio

EDS2041

Temperature, humidity, external probe support, 2K memory buffer, high power radio, & buffer only mode

EDS2042

Up to 3 waterproof external temperature probes, 2K memory buffer, high power radio, & buffer only mode

EDS REPEATER DEVICE IDS

Features

EDS2101

MeshNet Repeater with high power radio

SPECIFICATIONS

PARAMETER

MIN

TYP

MAX

UNITS

Operating Temperature Range

-40

°C

Accuracy (-200 to 800) with Input at 21°C

-0.1

0.1

°C

Battery Supply Voltage (battery in series)

2.2

3.1

Volts

Inline Power Supply

Volts

Enclosure Dimensions (L x W x H)

100

Notes:

1. The battery voltage varies depending on how much current is flowing. When the sensor is sleeping, the voltage is

higher than when it is awake. The reading is taken when the sensor is awake.

EN-USERMAN MN-RTD4W-H V1.0 10.09.2020

Regulatory Compliance

FEDERAL COMMUNICATIONS COMMISSION (FCC) COMPLIANCE STATEMENT

This device complies with part 15 of the FCC Rules. Operation is subject to the following two

conditions: (1) This device may not cause harmful interference, and (2) this device must accept any

interference received, including interference that may cause undesired operation.

INDUSTRY CANADA (IC) COMPLIANCE STATEMENT

This Class B digital apparatus complies with Canadian ICES-003.

Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.

EUROPEAN COMMUNITY (EC) DIRECTIVES CONFORMITY

APPLICATION OF COUNCIL DIRECTIVE 2004/108/EC Standard to which Conformity is Declared:

EN 61326-1:2006 (Emmissions)

EN 61326-2-3:2006 (Immunity)

EN 61000-3-2:2006+A1:2009+A2:2009 (Harmonics)

EN 61000-3-3:2008 (Flicker)

Caution: The manufacturer is not responsible for any radio or television interference caused by using

other than recommended cables or by unauthorized changes or modifications to this equipment.

Unauthorized changes or modifications could void the user’s authority to operate this equipment.

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