Edge Device Manual

Operator’s Manual

CALMS EDGE Device Manual

REV.   : 2020.1.0.2

DATE  : July 2020

Online application         : https://app.calms.com

Contact                         : info@calms.com

Before installing, starting or using this unit for the first time, this manual should be studied carefully to obtain a working knowledge of the unit and or the duties to be performed while operating and maintaining unit.

PRINT AND RETAIN THIS MANUAL WITH UNIT. This technical manual contains IMPORTANT  SAFETY DATA and should be kept with the unit.


Before starting up the device please read this manual in full and carefully observe instructions stated. The manufacturer cannot be held liable for any damage which occurs as a result of non-observance or non-compliance with this manual.

The CALMS CAL-EDGE-X  (X stands for 0 or 8, where number represents number of integrated analog inputs) is a highly sophisticated and affordable remote data logger for compressed air systems. Device connects directly to CALMS web application which provides real time access to data from any web browser for any end user and their service partner.


  • The easiest and cheapest solution for doing air audit online with independent experts
  • Shows where to save on energy costs
  • Helps improve your energy efficiency
  • Save your time and improve the organization
  • Calculates costs in relation to actual consumption
  • Increases the reliability of your equipment
  • Creates forecast of energy consumption
  • Increases your environmental image
  • Improves the investment process (energy equipment)


  • Plug & Play device, remote monitoring/alarming/reporting and air auditing, designed for compressed air systems
  • WEB based application for total air management ties CALMS monitoring together with CALMS leak management
  • Datalogger for compressed air system provides readings for web based detailed analysis and simulation tools
  • Energy management tools – Specific power, M/T, CUSUM analysis
  • Detailed analysis of compressed air system with auto generated reporting, warning  of poor efficiency with potential savings calculation compared to best in class efficiency from CALMS knowledge database
  • SIMULATION module integrated
  • Compressed Air Performance Scorecards
  • Expandable
  • Secure internet connection between device and CALMS web application
  • Multiple data export options (CSV,  XML), and easy online printing
  • Automated monthly reports send by email
  • Alarms & Warnings email or SMS notification including analysis data
  • Multiple access for end users and experienced CA service providers
  • Remote software upgrade capability
  • LTE cellular modem
  • No need for local operator panels – access from anywhere with tablet or smartphone
  • Robust industrial design

WARNING: Risk of Danger

WARNING: Risk of Electric Shock

WARNING: Consult Manual

  • Before installing or operating the CALMS CAL-EDGE-X , take time to carefully read all the instructions contained in this manual, all compressor manuals, and all manuals of any other peripheral devices that may be installed or connected to the unit.
  • Electricity and compressed air have the potential to cause severe personal injury or property damage.
  • The operator should use common sense and good working practices while operating and maintaining this system. All applicable codes should be strictly adhered to.
  • Maintenance must be performed by adequately qualified personnel that are equipped with the proper tools.


  • Installation work must only be carried out by a competent person under qualified supervision.
  • A fused isolation switch must be fitted between the main power supply and the CALMS CAL-EDGE-X .
  • The CALMS CAL-EDGE-X should be mounted in such a location as to allow operational and maintenance access without obstruction or hazard and to allow clear visibility of indicators at all times.
  • If raised platforms are required to provide access to the CALMS CAL-EDGE-X they must not interfere with normal operation or obstruct access. Platforms and stairs should be of grid or plate construction with safety rails on all open sides.


  • The CALMS CAL-EDGE-Xmust only be operated by competent personnel under qualified supervision.
  • Never remove or tamper with safety devices, guards or insulation materials fitted to the CALMS CAL-EDGE-X .
  • The CALMS CAL-EDGE-X must only be operated at the supply voltage and frequency for which it is designed.
  • When main power is switched on, lethal voltages are present in the electrical circuits and extreme caution must be exercised whenever it is necessary to carry out any work on the unit.
  • Do not open access panels or touch electrical components while voltage is applied unless it is necessary for measurements, tests or adjustments. Such work should be carried out only by a qualified electrician equipped with the correct tools and wearing appropriate protection against electrical hazards.

Maintenance and repair

  • Maintenance, repairs or modifications must only be carried out by competent personnel under qualified supervision.
  • If replacement parts are required use only genuine parts from the original equipment manufacturer, or an alternative approved source.
  • Carry out the following operations before opening or removing any access panels or carrying out any work on the CALMS CAL-EDGE-X :
    • Isolate the CALMS CAL-EDGE-X from the main electrical power supply.
    • Lock the isolator in the ‘OFF’ position and remove the fuses.
    • Attach a label to the isolator switch and to the unit stating ‘WORK IN PROGRESS - DO NOT APPLY VOLTAGE’. Do not switch on electrical power or attempt to start the CALMS CAL-EDGE-X  if such a warning label is attached.
  • Make sure that all instructions concerning operation and maintenance are strictly followed and that the complete unit, with all accessories and safety devices, is kept in good working order.
  • The accuracy of sensor devices must be checked on a regular basis. They must be calibrated when acceptable tolerances are exceeded. Always ensure any pressure within the compressed air system is safely vented to atmosphere before attempting to remove or install a sensor device.
  • The CALMS CAL-EDGE-X must only be cleaned with a damp cloth, using mild detergents if necessary. Avoid the use of any substances containing corrosive acids or alkalis.
  • Do not paint the control faceplate or obscure any indicators, controls, instructions or warnings.

Calms general conditions and policy of data protection

Calms website server owner provider

The CALMS website server owner and administrator (Provider) of www.calms.com is

CALMS Air Inc, 19 West 34th Street, NY10001 New York, USA, E: info@calms.com

General conditions agreement

By using the CALMS website, the user agrees to the CALMS general conditions agreement and Policy of Protecting of business data and accepts them.

Data accuracy

Provider strives to provide the most precise and current data on its website server, however, the website text is informative, therefore it is not liable for their accuracy. Data provided by CALMS devices and CALMS mobile devices depend on installation and setup from third party and are not responsibility of the provider, as well as reports, alarms generated by those data. Users interpret the contents on their own responsibility.

Limitation of liability

Neither Provider nor any other legal or natural person involved in the creation of this website server is responsible for any temporary disruption to this website, any possible information inaccuracies, or any damages that result in using inaccurate or incomplete information. Provider is not liable for any damage or inconveniences that result from the existence of this website server, from accessing to and/or using and/or inability to use information on this website and/or for any flaws or deficiencies in their contents, regardless of whether they have been notified on the possibility of such damages.

Since the Provider’s website server receives data from external devices and features certain links to websites that are not in any way connected to the Provider  and over which Provider has no control.  Provider cannot guaranty for them nor receive or transmit complaints about the accuracy of the content on any of the data or websites that are linked or referenced and is not responsible for data protection on these websites.

Personal data protection

The administrator may use and process the user’s personal data that are submitted when visiting the Provider website in accordance with the applicable regulations on personal data protection (Personal Data Protection Act ZVOP-1).

In accordance with ZVOP-1, the administrator may process personal data upon the user’s personal consent. Personal consent is the individual’s voluntary statement that their personal data may be processed for a certain purpose and is given based on information provided by the administrator. The individual’s personal consent can be written, oral, a click on a dialog box allowing cookie use, subscription on CALMS / CALMS application , or other applicable user consent forms.

For personal data protection purposes, the administrator will implement organizational, technical, and other appropriate procedures and measures to prevent unauthorized data deletion, change, loss, or unauthorized processing. As the web portal features certain links to other websites that are in no way connected to the provider, the administrator does not assume liability for data protection on these websites. The administrator is also not responsible for any mistakes that result in submitting false data upon registering at the portal website.


The cookies we install on your browser enable us to run all the website functions, adapt certain contents to you, and improve our website with page analytics.

You can opt out of using the cookies. In that case, the website will not load any permanent cookies to your browser apart from our own cookies we use for the page analytics. By opting out, you may not be able to view the entire page properly.

The website uses the following elements of other providers that also use cookies:

Facebook button, Tweeter button, and Google  button.

Changes to general conditions

The administrator reserves the right to change or add to the general conditions for the web portal at any time and without prior notice. The user will be notified on any changes to the general conditions with special pop-ups that will appear when accessing the website.

Policy of protection of business data

Provider (CALMS) provides internet based application located on cloud server as a service for Customer (Partner or End-user) for Compressed Air leak management and energy management

Provider and customer want to cooperate, that is why they want to establish confidentially relationship, and they conclude this policy with intention to prevent unauthorized disclosure of confidential information.

All information that customer will put on internet application will be shown only to customer users with password protection.

All data are located on secured web cloud database, with access for users that are confirmed by the customer .

Data related to CALMS or CALMS can be deleted anytime by customer assigned user only without provider notice. When data are deleted they will be completely removed from server database and backup – so no restore possible.

This policy is covering relationship between Provider (CALMS) and his customer only and  does not cover confidentially relationship between Partner and his End-user.

Privacy policy

This privacy policy manages the collection, storage and processing of personal data which Provider (CALMS)  is collecting from you once you subscribe to contents, such as newsletter, invitations to events, publications, compressed air leak and compressed air energy data collected by CALMS devices and other CALMS products.

The personal data managers as defined by the General Data Protection Regulation (GDPR) of the European Union are:

HPE d.o.o., Dolenjska cesta 83, 1000 Ljubljana, Slovenia Europe E: info@calms.eu


CALMS Air Inc, 19 West 34th Street, NY10001 New York, USA, E: info@calms.com

Personal information and the purpose of processing personal information

If you wish to receive contents from Provider (newsletter, invitations to events, publications and other Provider products), please fill out the registration form at the Provider website or purchase CALMS or CALMS product. By filling out and confirming this the registration form, you will submit the following contact details to Provider:

Name and Surname

E-mail address


Contact details submitted when filling out or submitting the form/order/application/registration are needed for processing your order and for communication regarding specific newsletter, events, publications and other Provider products to which you are subscribed. In case you do not provide the requested contact details, we will not be able to process your order and you will not be able to use the benefit of newsletter, events, publications and other Provider products.

Provider respects your privacy and is committed to being as diligent as possible regarding the collection, storage and processing of your personal data, and to always working in accordance with the current personal data protection regulation.

In order to prevent unauthorised access or disclosure of acquired data, to preserve the correctness of personal data and to assure that they are properly used, we are using suitable technical and organisational procedures for the protection of data we are collecting. Provider cannot exclude potential data abuse because internet is an unpredictable medium, despite all security measures and secure communication protocols.

Personal data submitted when registering for the newsletter, events, publications and other Provider products are processed with your clear and unambiguous consent based on Article 6 (1), (a) General Data Protection Regulation (GDPR). We also process information about opened received messages and clicks on links in received messages in order to improve the quality of our products and services, and for statistical purposes regarding e-mails that we send you.

You can withdraw your consent at any time by clicking the “Unsubscribe” link which is located in the footer of each message received from Provider, or via e-mail at the following address: info@calms.com. In case your consent is withdrawn, we will no longer use your personal data for informing you about Provider contents (newsletter, events, publications and other Provider products). Potential withdrawal of the consent does not affect the legality of your personal data processing in the period before the withdrawal was submitted.


In accordance with the provisions of the General Data Protection Regulation of the European Union, you have the right to access your personal data, the right to modification, deletion, transferability, the right to request limitation of data processing and the right to object.

Please contact our authorised person for data protection regarding all your rights and for additional information, they are available at info@calms.com.  We will process your application and respond in accordance with the GDPR.


Provider keeps your personal data as long as it is necessary for the purpose of sending you the content (newsletter, invitations to events and other Provider products) to which you subscribed. In case you no longer wish to receive content from Provider and you decide to unsubscribe or in case you withdraw your consent for processing of personal data for this purpose, we will block your data in the system and will no longer use it for this purpose.



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Quad core Cortex-A53 (ARM v7) 64-bit SoC @ 1.5GHz, 1GB DDR2 RAM

Quad core Cortex-A53 (ARM v7) 64-bit SoC @ 1.5GHz, 1GB DDR2 RAM





1x 10/100 Ethernet adapter

2x USB 2.0

1x 10/100 Ethernet adapter

Analog Inputs




Passive or active connection with internal 24Vdc, 12bit resolution, with standard connectors

RS 485

Standard: 1x, optional expandable

Standard: 1x, optional expandable

2-wire RS485

WEB management



Logging Interval

5 sec (configurable)

5 sec (configurable)

CS to CALMS web upload interval

5 min (configurable)

5 min (configurable)

Data Storage



Cloud connection



Operating Range

0 – 50 C  (32 F – 131 F)

0 – 50 C  (32 F – 131 F)

Power supply

9-24Vdc (power adapter included)

24Vdc (power adapter included)

Recommended: 50W. Depends on sensor usage

Cellular modem



Depends on network coverage

Antenna interface

Standard SMA interface-antenna included

Standard SMA interface-antenna included


H 32 x W 125 x L 160 mm

H 1,26 x W 4,92 x L 6,30 Inches

H 52 x W 125 x L 220 mm

H 2,05 x W 4,92 x L 8,66 Inches


Enclosure: Aluminium

Enclosure: Aluminium


DIN rail or wall mounting

DIN rail or wall mounting


EN 61000-6-2/EN 61000-6-4

EN 61000-6-2/EN 61000-6-4

IP rating






Installation overview

CALMS – Compressed Air Energy Management System – Process Diagram


It is recommended that installation and commissioning be carried out by an authorized and trained product supplier.

Unit location

The CALMS CAL-EDGE-X  can be mounted on a wall or on DIN rail (DIN rail accessory must be ordered separately). The CALMS CAL-EDGE-X  can be located remotely from the compressors and other connected equipment. Do not install device in highly dusty environment.

Pressure sensor mounting location

The system pressure sensor (P) must be located where it will see the air pressure that is common to all of the compressors. It can be

installed in a receiver tank or in a common discharge air header, as long as either one serves all the sequenced compressors installed. In either location, mount the transducer with a drip leg (recommended) and isolation valve to allow for easier installation, calibration and repairs.

Figure 2: Two options (A and B) of pressure transmitter mounting location

Wet and dry side pressure sensor mounting location

If you want to make a complete audit install two pressure transmitters: one located on the wet side and one on the dry side. Dry side pressure will be lower than the wet side pressure due to pressure differential losses across air treatment equipment. The nominal system pressure will reduce as the air treatment differential pressure increases.

Figure 3: Supply (wet) side pressure location

Figure 4: Demand (dry) side pressure location

Ensure each compressor is equipped with independent excess pressure shutdown. An increase in pressure differential across air treatment equipment can result in excess compressor discharge pressure.

Regular routine monitoring of pressure differential across air treatment equipment is recommended. You can obtain this with permanent monitoring of your pressure differential across air treatment equipment.

Terminals description

In this section is discussed what are the terminals of the CAL-EDGE-X device.

CAL-EDGE-0 front side

Figure 5: CAL-EDGE-0 (front side)

  • LAN: LAN port is used to connect CAL-EDGE-0 device to any other TCP/IP protocol capable device (MODBUS, ADS, OPC UA,…). This port is also used to connect device on internet when communication through mobile network is not working.

NOTE: If we want to connect device to internet through LAN port, a DHCP server must be installed in the network;

NOTE: Device is in normal condition when STATUS LED is orange;

NOTE: Be careful when wiring sensors to device. Improper connection may lead to device damage;

CAL-EDGE-0 rear side

Figure 6: CAL-EDGE-0 (rear side)

NOTE: Mount antenna on the place with best signal reception possible;

CAL-EDGE-8 front side

Figure 7: CAL-EDGE-8 (front side)

NOTE: If we want to connect device to internet through LAN port, a DHCP server must be installed in the network;

NOTE: Mount antenna on the place with best signal reception possible;

NOTE: Always make sure to screw plug to the header to avoid unintentional disconnection!

NOTE: Device is in normal condition when both LEDS’s are GREEN;

NOTE: Be careful when wiring sensors to device. Improper connection may lead to device damage.

NOTE: Always make sure to screw plug to the header to avoid unintentional disconnection!

** **

CAL EDGE-8 rear side

Figure 8: CAL-EDGE-8 (rear side)

NOTE: When using open-end cables (CAB-SENSOR) double check the connection. Improper connection can damage the device!

NOTE: Power supply voltage also powers connected sensors (choose input voltage required by sensors; commonly that is 24VDC).

Electrical connections

Power supply connection

CAL-EDGE-X device needs 9-24VDC power supply for operation (internal electronics can operate at any voltage within specified range). Power supply voltage also powers connected sensors (choose input voltage required by sensors; commonly that is 24VDC). Connect power supply to labelled terminals ( watch the polarity ) on screw-type phoenix connector.

NOTE: Power supply 24VDC/50W is shipped together with CAL-EDGE device.

NOTE: For CAL-EDGE-8 use input voltage required by used sensors. Commonly that is 24VDC

** **

Figure 9: Power supply adaptor 24VDC/50W

Figure 10: Power supply wiring scheme (CAL-EDGE-8)

Figure 11: Power supply wiring (CAL-EDGE-8)

Antenna connection

Connect antenna to ANT 1 terminal. Antenna is supplied together with CAL-EDGE device. Always position antenna to get best signal reception. Same antenna for CAL-EDGE-0 and CAL-EDGE-8 can be used.

Analog 4 20m a sensors connection

Analog sensors are connected to 4-pin solder type connectors. Connectors are internally wired to 18-bit resolution analog card. Sensor can be supplied through connector, because each connector is internally wired to power supply (24VDC).

Electrical connection

Figure 12: Internal wiring scheme of the analog connectors (CAL-EDGE-8)

Analog signal cable connection

Open-end wires cable connection color code:

  • wire 1: Brown: +24vdc
  • wire 2: White: 0vdc
  • wire 3: Yellow: 4-20mA signal in
  • wire 4: Green: not used


Accessories are used for easier installation of the sensors. We offer extension cables for analog connectors (CAB-AI) and we offer open-end cables (CAB-SENSOR) that are used to connect custom sensors. All sensors that are ordered from us will be shipped with connector already mounted.

NOTE: When using open-end connector (CAB-SENSOR) double check the wiring schematic. Improper connection may damage the CAL-EDGE device.

** **

Figure 13: CAB-AI

Open-end wires cable connection color code:

  • wire 1: Brown: +24vdc
  • wire 2: White: 0vdc
  • wire 3: Yellow: 4-20mA signal in
  • wire 4: Green: not used

Figure 14: CAB-SENSOR

Rs485 fieldbus connection

CAL-EDGE-X device has one standard RS485 2-wire input. Optionally another two RS485 inputs can be added. Supported protocol is MODBUS RTU. Always use appropriate cable (Belden 9841 or equivalent).

Electrical connection

Figure 15: RS485 wiring scheme (CAL-EDGE-8)

Figure 16: MODBUS RTU wiring scheme (CAL-EDGE-0)

Ethernet fieldbus connection

CAL-EDGE-X has one standard RJ45 port used to implement TCP/IP connection. Supported protocol so far are: MODBUS TCP/IP, ADS, OPC UA. CAL-EDGE-X device has configured fixed IP( in case there are not any DHCP servers in the network. If DHCP server is present in the network CAL-EDGE-X device will obtain IP from DHCP server.

This port can also be used to connect device to the internet in case of 4G modem failure or low signal strength.

Electrical connection

Figure 17: MODBUS TCP wiring scheme (CAL-EDGE-8 and CAL-EDGE-0)

Compressor connection

Each air compressor in your system must be interfaced to the CALMS CAL-EDGE-X . Compressor can be monitored through 1- phase current sensor or through power analyzer sensor to 4-20mA or MODBUS input. (8pin screw-type phoenix connector).

Start up procedure

To start using CAL-EDGE device a proper start-up procedure must be done:

  1. Modify the configuration file, using CALMS web application (check the CALMS web application user manual);
  2. Assign device to proper CALMS monitoring system (check the serial number at the bottom of the device);
  3. Add all channels on the CALMS monitoring system (check the configuration file to add proper CS box inputs);
  4. Connect antenna to ANT1 connector on the CAL-EDGE device;
  5. Connect all the analog sensors to the proper analog connector (A1-A8) on theCAL-EDGE-8 device;
  6. Connect all the MODBUS (RTU or TCP/IP) sensors to proper terminals on the CAL-EDGE-8 device;
  7. Plug in the power supply connector and screw the plug into the header in the CAL-EDGE device;
  8. After 10-20 seconds “ON” led (for CAL-EDGE-8) should turn green;
  9. After 5-10 minutes “COMM” led (for CAL-EDGE-8) should turn green;
  10. When the “COMM” led is on device downloads the configuration file from the CALMS web application. Device also checks each hour if configuration file has changed;
  11. Check the CALMS monitoring system if uploaded data is correct. Test sensors with manual measurements.

Optional available equipment

CS-485Modbus RTU industrial grade RS485 / RS422 to CS-Lite USB converter, 12 bit
SML-10Pressure transmitter 0-16 bar 4-20mA, 12 bit
FS10AFlow meter – thermal dispersion, 4-20mA output
CT RS 500A/4-20mACurrent transmitter Rogowski CT 0-500A/20mA
UT-750Ultrasonic vibration detector with 4 -20 mA output
PM-RS 500APower Analyzer with 3x Rogowski CT 500A, MODBUS RTU output
PDP-DEMDew Point sensor Mini with -60 - to +20degC +-2C, 4-20 mA, RS485 Modbus, power supply 24Vdc, aluminium casing, M8 with 5m cable, 1/4” Female Thread measuring chamber, No fittings
C-PT-PSPT100 Temperature probe for wall mount applications with 4-20mA output
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