INTEGRA Metering CALEC ST III User manual

CALEC® ST III
Standard & Smart
Multi-protocol heating and cooling energy calculator
User manual
3-140-UM-EN-02 1 / 56

Legal notice
2 / 56 3-140-UM-EN-02
Legal notice
Document release index
Version Date Modification(s)
01 12/02/2020 First release
02 04/27/2021
Connection of 2-wire temperature sensor updated
Menu structure extended by LON and KNX
Technical data updated
Original instructions
Publisher
INTEGRA Metering AG
Ringstrasse 75
CH-4106 Therwil
Switzerland
Phone: [phone]
[email protected]
www.integra-metering.com
Reproduction of these instructions or parts of them in whatever form is not permitted without express writ-
ten permission from the publisher.
The figures and information in these instructions are subject to technical changes that become necessary to
improve the product.

Table of contents
3-140-UM-EN-02 3 / 56
Table of contents
1 Introduction...................................................................................................................................6
1.1 About this product ...................................................................................................................................................... 6
1.1.1 Product description ..................................................................................................................................................... 6
1.1.2 Product identification.................................................................................................................................................. 6
1.1.3 Technical data ..............................................................................................................................................................7
1.1.4 Conformity...................................................................................................................................................................11
1.1.5 Declaration of conformity........................................................................................................................................... 12
1.2 About the instructions ............................................................................................................................................... 12
1.2.1 Purpose of this instruction ......................................................................................................................................... 12
1.2.2 Structure of overall documentation ........................................................................................................................... 12
1.2.3 Layout conventions .................................................................................................................................................... 12
2 Safety .......................................................................................................................................... 13
2.1 Explanation of warning notices .................................................................................................................................. 13
2.2 Intended use............................................................................................................................................................... 13
2.3 General safety instructions ........................................................................................................................................ 13
2.4 Technical condition of the product.............................................................................................................................14
3 Product view................................................................................................................................ 15
3.1 Product design............................................................................................................................................................ 15
3.2 Functional description................................................................................................................................................ 15
3.3 Calibration and verification ........................................................................................................................................ 16
3.4 Product versions ......................................................................................................................................................... 16
4 Transport / scope of delivery....................................................................................................... 18
5 Installation .................................................................................................................................. 19
5.1 Conditions .................................................................................................................................................................. 19
5.2 Mechanical installation ..............................................................................................................................................19
5.2.1 Installation on a wall ................................................................................................................................................. 20
5.2.2 Installation on a rail DIN EN 50222............................................................................................................................. 21
5.3 Electrical installation..................................................................................................................................................23
5.3.1 Connecting the CALEC® STIII Standard..................................................................................................................... 24
5.3.2 Connecting the CALEC® STIII Smart...........................................................................................................................25
5.3.3 Connecting 2-wire temperature sensors.................................................................................................................... 26
5.3.4 Connecting 4-wire temperature sensors ................................................................................................................... 26
5.3.5 Connecting flow meters without power supply..........................................................................................................27
5.3.6 Connecting flow meters with a 3.6V power supply....................................................................................................27
5.3.7 Connecting flow meters with a 24V power supply.................................................................................................... 28
5.3.8 Connecting flow meters with a 24V power supply and grounding............................................................................ 28
5.3.9 Connecting flow meters with two groundings........................................................................................................... 29
5.3.10 Connecting the digital output ................................................................................................................................... 29
5.3.11 Connecting the M-Bus (wired and wireless) .............................................................................................................. 30
5.3.12 Connecting the communication modules................................................................................................................... 31
6 Operation.....................................................................................................................................36
6.1 Operating elements................................................................................................................................................... 36

6.1.1 Display ........................................................................................................................................................................37
6.1.2 Buttons.......................................................................................................................................................................37
6.2 Switching on the meter ............................................................................................................................................. 38
6.3 Navigating through the menus.................................................................................................................................. 39
6.4 Editing parameter values .......................................................................................................................................... 39
6.5 Entering the service mode ......................................................................................................................................... 40
6.6 Menu structure ........................................................................................................................................................... 41
6.6.1 Counter ....................................................................................................................................................................... 41
6.6.2 Info .............................................................................................................................................................................41
6.6.3 Test............................................................................................................................................................................. 41
6.6.4 Instant........................................................................................................................................................................41
6.6.5 Time........................................................................................................................................................................... 42
6.6.6 Stich .......................................................................................................................................................................... 42
6.6.7 Logger........................................................................................................................................................................ 43
6.6.8 Inputs ........................................................................................................................................................................ 43
6.6.9 Outputs ..................................................................................................................................................................... 44
6.6.10 I-Out .......................................................................................................................................................................... 44
6.6.11 Units .......................................................................................................................................................................... 44
6.6.12 M-Bus ........................................................................................................................................................................ 45
6.6.13 Modbus...................................................................................................................................................................... 45
6.6.14 N2-Bus....................................................................................................................................................................... 45
6.6.15 BACnet....................................................................................................................................................................... 45
6.6.16 LON............................................................................................................................................................................ 46
6.6.17 KNX............................................................................................................................................................................ 46
6.6.18 LoRa .......................................................................................................................................................................... 46
6.6.19 Config ........................................................................................................................................................................ 46
6.6.20 System........................................................................................................................................................................47
6.6.21 Init ..............................................................................................................................................................................47
6.7 Commissioning...........................................................................................................................................................47
6.8 Additional functions.................................................................................................................................................. 48
6.8.1 Billing date values ..................................................................................................................................................... 48
6.8.2 Data logging............................................................................................................................................................... 48
6.8.3 Simultaneous readout............................................................................................................................................... 48
6.8.4 Low-flow OFF function.............................................................................................................................................. 48
6.8.5 Energy metering in heating/cooling systems .......................................................................................................... 48
6.8.6 Recording of „heat return“ ........................................................................................................................................ 48
6.8.7 Heat carriers with frost protection additives............................................................................................................. 48
6.8.8 Solar-powered thermal systems ............................................................................................................................... 49
6.8.9 CALEC® ST III Flow..................................................................................................................................................... 49
6.8.10 Smart Phone Android commissioning....................................................................................................................... 49
6.8.11 PC Software AMBUS® Win commissioning ............................................................................................................... 50
7 Maintenance................................................................................................................................ 51
7.1 Calibration .................................................................................................................................................................. 51
8 Service and repairs.......................................................................................................................52
8.1 Exchanging the calculator...........................................................................................................................................52
8.2 Troubleshooting .........................................................................................................................................................52
9 Decommissioning / storage / disposal........................................................................................54
Table of contents
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Table of contents
3-140-UM-EN-02 5 / 56
9.1 Decommissioning ...................................................................................................................................................... 54
9.2 Storage ...................................................................................................................................................................... 54
9.3 Disposal ..................................................................................................................................................................... 54
Appendix .....................................................................................................................................55
Drilling template.........................................................................................................................................................55

Introduction
6 / 56 3-140-UM-EN-02
1 Introduction
1.1 About this product
1.1.1 Product description
CALEC® ST III is an energy meter used in the areas of:
lcommercial buildings / building technology
lnear and district heating / district cooling
lresidential construction / sanitary
The main applications of the product are:
lSystem integration component
With the versatile interfaces of CALEC® ST III the
energy data of all thermal applications can be
easily integrated in subordinate energy manage-
ment and building control systems.
lHeating / cooling transmission station
Together with the various flow meters of INTE-
GRA Metering / Aquametro AG, the energy cal-
culator CALEC® ST III offers the perfect combina-
tion for the determination of performance data
in medium heating applications, in particular for
distribution stations and larger buildings.
1.1.2 Product identification
The face plate on the CALEC® STIII states the fol-
lowing information:
1 Serial number / manufacturing year
2 Article number
3 IP protection code
4 Power supply specification
5 Address of manufacturer
6 Marking heating (Europe CE)
7 Recalibration label (CH or DE)
8 Type of temperature sensor
9 Range of ambient temperature
10 Range of medium temperature
11 Range of medium temperature difference
12 Environmental class and mechanical envi-
ronmental class
13 Battery specification
14 Marking cooling (CH)
15 Marking cooling (DE)
1
2
3
4
5
7
8
9
10
11
12
13
14
15
6

Introduction
3-140-UM-EN-02 7 / 56
1.1.3 Technical data
Housing and operating conditions
Dimension
Ambient temperature +5 ... +55°C, EN 1434 class C
Storage temperature 0...60°C
Humidity Max. 95%
Operating altitude Up to 2000m above sea level
Protection class IP54 according to EN 60529
Terminals Signal connection: 1.5mm2 screw terminals
Power connection: 2.5mm2 screw terminals
Lifetime Operational period 15 years, includes 3 cycles of calculator-module
and thermal probes replacement.
Protection against mechanical
stress Vibrations/shock according to EN 1434 – 7.23
Mounting Wall mounting with 3 points
DIN-rail mounting (DIN-EN 50222)
Cable inlets
1x Ø 4-8mm power port
4x Ø 2.5-5mm signal port
1x Ø 4-8mm signal port
Basic data for calculator
Temperature measuring range 0...+200 °C (heat carrier: water)
-40...+180 °C (special heat carrier)
Temperature difference
0...199K
Type approval 3...190K
On demand 1...199K and 2...199K
Temperature sensor
Pt 100, Pt 500, Pt1000 according to IEC 751 paired in accordance
with EN 1434
2-wire or 4-wire connection.
Max. sensor cable length 2-wire connection: 10 m
Max. sensor cable length 4-wire connection: 100m
Temperature measurement resolu-
tion 20 bit resolution, typical ± 0.005 K (Ta = 5...55 °C)
Installation side Hot or cold side
Pulse value of the flow meter 0.001...9999.999 liters or m3
Pulse values and units for auxiliary
inputs and contact outputs
Volume: 0.001...9999.999 ml, l, m3, GAL
Energy: 0.001...9999.999 Wh, kWh, MWh, MJ, GJ, KBTU, MBTU
Mass: 0.001...9999.999 T, Kg
Unitless mode possible: 0.001...9999.999

Introduction
8 / 56 3-140-UM-EN-02
Basic data for calculator
Error limits
Better than those required for calculators in accordance with
EN1434-1. Suitable for combined class 2 heat meters in accordance
with EN 1434-1 when used with suitable volume metering units
NFC interface For commissioning / parametrization: 13.56MHz
Bluetooth interface For commissioning / parametrization: 2.4GHz
Display
Display type Backlit multi-function LCD display with 8 digits for meter reading.
Symbols and short texts for user operation purposes.
Display size 15mm x 68mm
Display resolution and units vol-
ume 1 – 0.001m3, US Gal
Display resolution and units energy 1 – 0.001kWh, MWh, MJ, GJ, KBTU, MBTU
Display resolution and units mass 1 – 0.001T
Error display Visible fault state indicator in display. Display blinks red in case of
an error.
Additional functions
Data logger 500 values from all readings with a time stamp, stored in ring mem-
ory, logger interval, 1minute, 1hour, 1day, 1week, 1month
Billing data values 12 freely programmable billing dates to memorize indexes (e.g.
monthly) for defined dates. Indexes can be consulted any time.
Flow rate configuration
Specific configuration for flow rate measurement purposes only. It
can be 1 channel, 2 channels or 2-channel pulse collector to calculate
the total sum.
Temperature measurement is disabled; no temperatures are de-
tected or displayed.
Glycol-based medium The “Glycol-based heat transfer medium” (GLY) option offers an ex-
cellent solution for solar-power thermal systems.
On-site settings One-time on-site setting for calibration-relevant input values “IMP
EBS”
Simultaneous readout
The specific “freeze” command makes it possible to store the de-
sired values, which can then be read out one by one from the sys-
tem.
Bi-directional energy metering BDE
The BDE option allows emitted energy to be measured even in twin-
conduit networks that perform a combined heating and cooling
function. The measurement readings for heating and cooling are
recorded separately for their corresponding cost calculation pur-
poses.
Combined heat- / cold meters BDV
The BDV option allows the measuring of energy exchange (draw/
supply) for interlinked networks and charging / discharging in heat
accumulators. The measurement of positive and negative are
recorded separately for their corresponding energy consumption.
Heat- / cold meters with two paral-
lel flow sensors TWIN-V
The Twin-V option is suitable for summer / winter metering where
heating and cooling meters have two parallel flow sensors.
Heat- / cold meters DTF The DTF option allows the measuring of energy heating or cooling
meter with external tariff control for two tariff registers.
Heat- / cold meters Twin-E
The Twin-E option allows a measurement of parallel consumers
composed of one closed circulation and one open circulation with
reference temperature.
Heat- / cold meters TGR The TGR option allows a measurement with bonus / malus tariff
management including reference temperature control.

Introduction
3-140-UM-EN-02 9 / 56
Additional functions
Heat- / cold meters eight tariffs
This option allows the management of up to eight different tariffs
with reference temperature control. The measurement is split into
different registers.
Data backup in the event of a
power failure In EERPOM >10 years
Adjustable low temperature differ-
ence ΔT cut-off (LFCO)
Function for stopping the energy calculation when the temperature
difference is too low, ΔT LFCO adjustable ΔT = 0-2.99K.
Limit value monitoring One-sided or two-sided, hysteresis 0 – 10%, action of the output
signal is selectable.
Mains version
Power supply (Standard version) 1W / 24VAC/DC – 240VAC, 50/60Hz (according to EN 1434).
Power supply (Smart version) 5W/110 – 240VAC, 50/60Hz (according to EN 1434)
Calculation cycle 1s
Backup battery real-time clock 3V Li-Mn CR1220
Low voltage power supply for flow meters
Voltage Flow meter
Supply voltage (Standard & Smart
version)
2x 3.6VDC, max. 2mA
galvanic isolation max. 48VDC e.g. AMFLO® SONIC UFA 113
Supply voltage (only on Smart ver-
sion)
1x 24VDC, max.150mA
galvanic isolation max.48V DC
e.g. AMFLO® MAG Smart or ac-
tive sensors
3.6V sensor power output
Power supply, galvanically isolated to the system, for external flow
meters.
Vout nom 3.6V
VOUT min 3.45V
VOUT max 3.75V
IOut min 10mA
VRipple 50mV
Load regulation ±1% @load steps of 5mA
Insulation voltage galvanic isola-
tion
Normative 48V
technical: 312VAC
Clearance to other circuits 0.5mm
24V sensor power output
Power supply, galvanically isolated to the system, for external loads
or flow meters.
Vout nom 24V
VOUT min 22V
VOUT max 26V
IOut min 180mA
VRipple 200mV
Load regulation ±6% @load steps of 100mA
Insulation voltage galvanic isola-
tion
Normative 48V
Technical: 312VAC
Clearance to other circuits 0.5mm
Pulse inputs
Input #1 (10/11)
Input #2 (54/55)
Connecting a pulse generator according to NAMUR, with potential-
free contact (reed relay) or SSR (solid state relay), or for active sen-
sors with the following values.

Introduction
10 / 56 3-140-UM-EN-02
Pulse inputs
Pulse input class ID
2-wire pulse input according to class ID compliant with EN1434-2
Suitable for NAMUR-, “Open Collector” or mechanical pulse sources
Supply voltage 8…8.4V
Source impedance 1kΩ
Switching threshold IL 2.1mA
Switching threshold IH 1.2mA
Pulse length ≥ 2ms
Pulse pause ≥ 2.5ms
Max. pulse frequency ≤ 200Hz
Typical input capacitance 20nF
Pulse outputs
Output #1 (50/51) Passive digital output
Pulse output
Contact rating 48VDC, 100mA
Electrical isolation 48V
Contact resistance (on) <30Ω
Contact resistance (off) >10MΩ
Pulse frequency Max. 4Hz
Pulse width 100ms
M-Bus (on-board or option)
M-Bus interface According to EN 13757-2/-3
Addresses Primary address: 0
Standard secondary address: 99999999
Baud rate 300, 2’400, 9’600Baud
wM-Bus (on-board or option)
wM-Bus interface According to EN 13757-4 / OMS 4.0
Frequency band 868MHz (T1 Mode)
Addresses OMS address including serial number of the device
Modbus RTU (option)
Physical layer and address RS 485 / address: 1
Baud rate 300, 2’400, 9’600, 19’200, 38’400Baud
Address range (slave) 1...247
Parity Even
Function code 03: Read holding register
LON interface (option)
Type
LON TP-FT 10
Free topology (2-wire twisted pair)
Certified in accordance with LONMARK® 3.4
Baud rate 78k Baud
Max. bus length 500m / 2700m with/without termination resistors
64 nodes per segment
BACnet MS/TP (option)
Physical layer and AMT ID RS 485 / ID: 431
BACnet device profile and instance B - ASC / the last 5 digits of the serial number
BACnet MAC address The last 2 digits of the serial number
Baud rate and mode Automatic / master

Introduction
3-140-UM-EN-02 11 / 56
N2Open (option)
Physical layer and address RS 485 / address: 1…255 / Default: 1
Baud rate 9’600Baud
2 analog outputs (option)
Output signal 4...20mA or 0...20mA
Supply voltage 6...24VDC
Electrical isolation max. 48VDC
Maximum resistance ≤ 837Ω at 24 VDC, 0Ω at 6V
Maximum transformer error 0.15% of measured value + 0.15% of end value
KNX (option)
Type TP1 (2-wire twisted pair), certified according to KNX standard 2.1
Max. power consumption 10mA
Baud rate 9’600Baud
LoRa Wireless (option)
Communication interface LoRaWAN
Frequency band 868MHz (T1 mode) – 16mW
Addresses LoRa address
Max. power consumption 50mA
Impedance of antenna 50Ω
Reinforcement 0db
Antenna connection Connector SMA
Smart Phone Commissioning
Operating system Android >6.0; available on Play Store
App ParamApp
Features Commissioning and readout via NFC and Bluetooth interface for
better usability
1.1.4 Conformity
CE guidelines
2014/32/EU Measuring Instruments Directive (MID)
2014/30/EU Electromagnetic Compatibility (EMC)
2014/35/EU Low Voltage Directive (LVD)
2012/19/EU Waste Electrical and Electronic Equipment (WEEE)
2011/65/EU Restriction of hazardous substances in electrical and electronic equipment (RoHS)
2014/53/EU Radio Equipment Directive (RED)
Standards
EN 1434
EN 13757-2/3/5/6
EN 61010-1
EN 62368-1
DIN 43863-5
EN 301 489-3:V2.1.1
EN 301 489-17:V3.2.0
EN 61000-3-2
EN 61000-3-3

Introduction
12 / 56 3-140-UM-EN-02
Standards
EN 61326-1
EN 62479
EN 300 220-2:V3.1.1
EN 300 330:V2.1.1
EN 300 328:V2.1.1
Specific
PTB K7.2, Ordonnance of FDJP 941.231 (CH), Welmec 7.2, OIML D11
1.1.5 Declaration of conformity
The declaration of conformity is available by scan-
ning the QR-Code.
1.2 About the instructions
1.2.1 Purpose of this instruction
This instruction is part of the product. Keep the instruction handy so that it is always accessible at all times.
This instruction is intended to ensure that the product is used safely and for the intended purpose. The op-
erator must ensure that the operating personnel have read and understood the instructions. The operator
must ensure that the operating instructions of the associated products are also read and understood.
1.2.2 Structure of overall documentation
The following documents complete the documentation of this product:
lUser manual (this document). Available for download on https://integra-metering.com/downloads
lInstallation guide. Included in the product delivery.
lTechnical data sheet. Available for download on https://integra-metering.com/downloads
1.2.3 Layout conventions
Symbols and text markups
This document contains various symbols and text markups.
Symbol Name Function
lEnumeration The grey dot marks a non-numbered list.
uAction The grey triangle marks actions that must be per-
formed in the corresponding order.
u
wReaction
The white triangle marks the reaction to an action.
(1) Item numbers The numbers inside the brackets refer to the items
in an image.
Legal notice [}p.2] Cross-reference
Cross-references are used to refer to a chapter
within the document. They are linked and are acces-
sible from the PDF by a mouse click.
Tips are used to support the reader in handling the product.

Safety
3-140-UM-EN-02 13 / 56
2 Safety
2.1 Explanation of warning notices
DANGER
Danger
This safety warning indicates a hazard of high risk that will lead to serious physical injury or
death.
uMeasures to avoid the hazard.
WARNING
Warning
This safety warning indicates a hazard of medium risk that may lead to serious injury or
death.
uMeasures to avoid the hazard.
CAUTION
Caution
This safety warning indicates a hazard of low risk that may lead to minor or moderate injury.
uMeasures to avoid the hazard.
NOTICE
Notice
The notice indicates a situation which may cause damage to property.
uMeasures to avoid the property damage.
2.2 Intended use
The CALEC® ST III is exclusively designed for the collection, analysis, presentation and transmission of infor-
mation.
The product must only be used for applications in accordance with the specifications in the technical data.
Any other use is prohibited and is considered inadmissible.
2.3 General safety instructions
Personal safety
Make sure that your actions do not expose anyone to risk.
Personnel requirements
Any work on the product may only be carried out by qualified personnel. Necessary instruction can be pro-
vided by the manufacturer.
Occupational safety
The operator is subject to the legal obligations of occupational safety. Compliance with all locally applicable
accident prevention regulations and general rules is the responsibility of the operator.
Instructions
The operating personnel must have read and understood the instructions. All safety instructions and in-
structions for action must be strictly observed. The operating instructions must be kept within easy reach.
Further operating instructions
The instructions of the associated products must also be read and understood. All safety instructions and
instructions for action must be strictly observed.

Safety
14 / 56 3-140-UM-EN-02
2.4 Technical condition of the product
Spare parts
Replace defective parts only with original spare parts from INTEGRA Metering.
Software
The software must not be modified.
Backfitting
The product must not be backfitted. Changes of the operating mode must be agreed in writing with the
manufacturer.

Product view
3-140-UM-EN-02 15 / 56
3 Product view
3.1 Product design
1 Front cover
2 Connection diagram (inside of front cover)
3 Pluggable calculator
4 Motherboard with connection
5 Clip-on holder for top-hat rail
1
2
3
4
5
3.2 Functional description
A heat or cooling meter is composed of the following
individually approved sub-assemblies:
1 Energy calculator
2 Temperature sensor for forward
3 Temperature sensor for return
4 Flow meter
The thermal output (P) of a pipe-conduit network is
based on a measurement of the flow temperature,
return-flow temperature and volume flow of the
heat transfer medium.
P = Volume of flow × (T heat side - T cold side) × k
1
2
3
4
forward
return
Flow-rate measurement
The system is compatible with all standard flow meters which use a pulse output. The pulse value should be
set as low as possible if continuous measurement or high-resolution energy metering is required.
The mains-powered CALEC® ST III can operate with contactors up to 20Hz and electronic transmitters (NA-
MUR, etc.) with pulse frequencies of up to 200Hz.
The flexible calculation of heat capacity and density facilitates accurate energy measurement, not only for
water circuits, but also for a variety of other heating or refrigeration media.
The point of installation of the flow meter is crucially important, because the volume-to-mass conversion is
based on the temperature detected at this point.
It is preferable to fit the flow meter to the section of the line where the temperature is closest to room tem-
perature.

Product view
16 / 56 3-140-UM-EN-02
Temperature measurement
The CALEC® ST III is fitted with two highly accurate temperature measurement inputs. They are each con-
nected to type-approved, paired temperature sensors in two- or four-wire configuration. The planning of
systems should conform to heat meter standard EN 1434, parts 2 and 6. EN 1434-4 stipulates that only sen-
sors of the same design and length should be paired together.
The counter mechanism is available in either Pt 100, Pt 500 or Pt 1000 configuration.
Thermal energy is measured from a temperature difference from dT above (respectively below) 0K. The
CALEC® ST III is the ideal solution for air-conditioning or cooling installations when used with appropriate
temperature sensors and flow meters for cooling.
3.3 Calibration and verification
In most countries energy metering systems used for commercial purposes are subject to compulsory verifi-
cation. The devices comprising the metering system must all possess official pattern approval. CALEC® ST III
has been approved according to both the European Measuring Instruments Directive 2014/32/EU and the
German PTB K 7.2 directive for cooling meters.
Officially verified heat and cooling meters must be reverified before the verification period has expired. The
operator is responsible for compliance with this requirement. (Re-)Verification includes all parts (tempera-
ture and flow sensors, calculator) forming the complete heat meter. The plug-in calculator minimizes the
cost of recalibration as the wiring does not have to be disconnected and device-specific data remain stored
in the configuration memory in the base of the housing.
The “IMP EBS” option makes it even easier to set up devices which require calibration, as the pulse value
and installation side can be set on-site.
AMBUS® WIN II can be used for parameterization, adjustment to new conditions and to read data from the
device. AMBUS® WIN II is available as a free download.
3.4 Product versions
The CALEC® STIII exists in two versions: CALEC® STIII Standard and CALEC® STIII Smart.
CALEC® STIII Standard
The main features of CALEC® STIII Standard are:
lStandard applications
lUltra-wide range power supply: 24VAC – 240VAC
lSensor power supply: 2×3.6V
lCommon communication interfaces (up to 3)
– 1× wireless communication on board (WM-Bus)
– 1× wired communication on board (M-Bus)
– 1× extension slot for adding options: KNX, LON, Wireless LoRa, 2AOU
l2× inputs for temperature 2 / 4-wires (PT100 / 500 / 1000)
l2× master inputs (volume / status)
– On the second input, pulse, volume, mass, energy, status and alarm can be selected as input.
– More inputs over slots possible
l1× digital output
– Pulses, limit1, limit2, alarm, M-Bus and test can be selected as output.
lNFC and Bluetooth communication on-board for commissioning
CALEC® STIII Smart
The main features of CALEC® STIII Smart are:
lHigh end and extended applications
lWide range power supply: 115V / 240V
lSensor power supply 2×3.6V and 24VDC
lVarious communication interfaces (up to 6)
– 1× wireless communication on board (WM-Bus)
– 1× wired communication on board (M-Bus)
– 2× RS485 on board module configurable: M-Bus, Modbus, BACnet, N2Open

Product view
3-140-UM-EN-02 17 / 56
– 2× extension slots for adding options: KNX, LON, Wireless LoRa, 2AOU
l2× inputs for temperature 2 / 4-wires (PT100 / 500 / 1000)
l2× master inputs (volume / status)
– On the second input, pulse, volume, mass, energy, status and alarm can be selected as input.
– More inputs over slots possible
l1× digital output
– Pulses, limit1, limit2, alarm, M-Bus and test can be selected as output.
lNFC and Bluetooth communication on-board for commissioning

Transport / scope of delivery
18 / 56 3-140-UM-EN-02
4 Transport / scope of delivery
NOTICE
Transport damage
Non-compliance with the required transport and environmental conditions can lead to trans-
port damage and malfunctions.
uProtect the product from heat, moisture, dirt and vibration.
uStore the product in a cool and dry place.
uDo not remove the packaging until immediately before installation.
Check delivery
uCheck delivery to ensure supply is complete.
uCheck delivery for transport damage immediately upon receipt.
In case of externally visible transport damage, proceed as follows:
uDo not accept delivery or accept it under reserve.
uNote the extent of damage on the transport documents or on the delivery note of the carrier.
uReport any damage to INTEGRA Metering immediately.

Installation
3-140-UM-EN-02 19 / 56
5 Installation
CALEC® ST III can be installed on a flat wall or on a mounting rail. Suitable mounting rails are available as ac-
cessories.
5.1 Conditions
uMeet the following conditions according to the specifications in the Technical data to ensure a reliable
operation.
lSpace requirements
lAmbient conditions
lDimensions
lElectrical connection
5.2 Mechanical installation
DANGER
Electric shock
Touching energized system parts can cause immediate death or serious injury.
uMake sure that installation work is only carried out by authorized specialists.
uBefore carrying out any work on the system, disconnect the power supply and check that
no voltage is present.
uIf an insulation is damaged, disconnect the power supply immediately and arrange for im-
mediate repair.
Installation location
NOTICE
Material damage due to inappropriate environmental conditions
Non-compliance with the required environmental conditions can lead to material damage and
malfunctions.
uEnsure that the product is accessible for installation, operation and maintenance work.
uAvoid heat, moisture, dirt and vibration.
uInstall the product in a cool and dry place.
uEnsure a safe distance to sources of electrical noise.
uMake sure that there is a clearance of 50mm
above the open cover of the meter.
uMake sure that there is a distance of 85mm be-
tween the top edge of the mounting rail and the
ceiling.
50
85

Installation
20 / 56 3-140-UM-EN-02
5.2.1 Installation on a wall
Tools and installation material are not included in the delivery.
lFlat screwdriver 3.5×0.6
lTorx screwdriver TORX T15
lDrill bit Ø6
lScrews 3×Ø4
lDowels 3×Ø6
lWashers 3×4.3×12
Take off the front cover
uRemove the two screws(1).
uRemove the cover(2).
2
1
1
Drill holes
uUsing the drilling template [}p.55], drill three
holes Ø6mm into the wall.
uMount dowels 3×Ø6.
uMount the device with the three screws(1) and
washers onto the wall.
1
1
1