Wilo BM-S User manual

Pioneering for You
Wilo-Connect module BMS
4257831 • Ed.02/2023-10
en Installation and operating instructions

Connect module BMS
https://qr.wilo.com/1680

en
Installation and operating instructions • Wilo-Connect module BMS • Ed.02/2023-10 3
Table of Contents
1 General information ..........................................4
1.1 About these instructions..........................4
1.2 Copyright ....................................................4
1.3 Subject to change......................................4
2 Safety ..................................................................4
2.1 Identification of safety instructions .......4
2.2 Personnel qualifications ...........................5
2.3 Danger in the event of non‑observance
of the safety instructions .........................6
2.4 Operator responsibilities ..........................6
2.5 Safety instructions for inspection and in-
stallation work ...........................................7
2.6 Unauthorised modification and manufac-
ture of spare parts .....................................7
2.7 Improper use...............................................8
3 Transport and storage.......................................8
3.1 Scope of delivery .......................................8
3.2 Transport inspection.................................8
4 Intended use.......................................................8
4.1 Compatibility of the firmware .................9
5 Product information ..........................................9
5.1 Type key......................................................9
5.2 Technical data............................................9
6 Description and function ............................... 10
6.1 Analogue input 0-10V ...........................11
6.2 Digital input..............................................12
6.3 Digital output (changeover contact relay)
....................................................................12
6.4 Other functions........................................13
7 Installation and electrical connection .......... 13
7.1 Installation................................................14
7.2 Electrical connection...............................15
8 Commissioning/ Functional test................... 17
8.1 Settings.....................................................17
8.2 Settings for pumps without suitable dis-
play ............................................................23
9 Maintenance.................................................... 23
10 Faults, causes and remedies .......................... 23
11 Spare parts....................................................... 24
12 Disposal............................................................ 24
12.1 Information on the collection of used
electrical and electronic products ........ 24

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4 Installation and operating instructions • Wilo-Connect module BMS • Ed.02/2023-10
1 General information
1.1 About these instructions
These instructions form part of the product. Compliance with the instructions is essential for correct hand-
ling and use:
•Read the instructions carefully before all activities.
•Keep the instructions in an accessible place at all times.
•Observe all product specifications.
•Observe the markings on the product.
The language of the original operating instructions is German. All other languages of these instructions are
translations of the original operating instructions.
1.2 Copyright
WILO SE © 2023
The reproduction, distribution and utilisation of this document in addition to communication of its contents
to others without express consent is prohibited. Offenders will be held liable for payment of damages. All
rights reserved.
1.3 Subject to change
Wilo shall reserve the right to change the listed data without notice and shall not be liable for technical inac-
curacies and/or omissions. The illustrations used may differ from the original and are intended as an exem-
plary representation of the product.
2 Safety
These operating instructions contain basic information which must
be adhered to during installation and operation. For this reason, these
installation and operating instructions must, without fail, be read by
the service technician and the responsible qualified personnel/oper-
ator before installation and commissioning.
Not only must the general safety instructions listed under this main
"Safety" section be adhered to, but also the special safety instruc-
tions that are marked by danger symbols and included under the fol-
lowing main sections.
2.1 Identification of safety instructions
These installation and operating instructions set out safety instruc-
tions for preventing personal injury and damage to property, which
are displayed in different ways:

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Installation and operating instructions • Wilo-Connect module BMS • Ed.02/2023-10 5
•Safety instructions relating to personal injury start with a signal
word and are preceded by a corresponding symbol.
•Safety instructions relating to property damage start with a signal
word and are displayed without a symbol.
Signal words
•DANGER!
Failure to follow the instructions will result in serious injury or
death!
•Warning!
Failure to follow instructions can lead to (serious) injury!
•Caution!
Failure to follow instructions can lead to property damage and pos-
sible total loss.
•Notice!
Useful information on handling the product
Symbols
These instructions use the following symbols:
General danger symbol
Danger of electric voltage
Warning – hot surfaces
Danger for electrostatic sensitive components (ESD)
Notices
2.2 Personnel qualifications
Staff must:
•be instructed about locally applicable regulations governing acci-
dent prevention,

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6 Installation and operating instructions • Wilo-Connect module BMS • Ed.02/2023-10
•have read and understood the installation and operating instruc-
tions.
Personnel must have the following qualifications:
•Electrical work: a qualified electrician must carry out the electrical
work.
•The product must be operated by persons who have been instruc-
ted on how the complete system functions.
•Maintenance work: The technician must be familiar with the use of
operating fluids and their disposal.
Definition of “qualified electrician”
A qualified electrician is a person with appropriate technical educa-
tion, knowledge and experience who can identify and prevent elec-
trical hazards.
2.3 Danger in the event of non‑observance of the safety in-
structions
Non-observance of the safety instructions can result in risk of injury
to persons and damage to product/unit. Non-observance of the
safety instructions will render any claims for damages null and void. In
particular, non-observance can, for example, result in the following
risks:
•Danger to persons due to electrical, mechanical and bacteriological
factors
•Damage to the environment due to leakage of hazardous materials
•Damage to property
•Failure of important product/unit functions
•Failure of required maintenance and repair procedures
2.4 Operator responsibilities
The operator must:
•Provide the installation and operating instructions in a language
which the personnel can understand.

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Installation and operating instructions • Wilo-Connect module BMS • Ed.02/2023-10 7
•Make sure that personnel are suitably trained for the specified
work.
•Verify the area of responsibility and individual responsibilities of
personnel.
•Train personnel with regard to the system operating principles.
•Eliminate any risk from electrical current.
•Ensure compliance with the regulations for accident prevention.
This device can be used by children from 8years of age as well as
people with reduced physical, sensory or mental capacities or lack of
experience and knowledge if they are supervised or instructed on the
safe use of the device and they understand the dangers that can oc-
cur. Children are not allowed to play with the device. Cleaning and
user maintenance must not be carried out by children without super-
vision.
2.5 Safety instructions for inspection and installation work
The operator must ensure that all inspection and installation work is
carried out by authorised and qualified personnel who are also suffi-
ciently informed from their own detailed study of the installation and
operating instructions.
Work on the product/unit may only be carried out when the system is
at a standstill. The procedure described in the installation and operat-
ing instructions for shutting down the product/unit must be strictly
observed.
Immediately after completing work, all safety and protective devices
must be put back in position and/or recommissioned.
2.6 Unauthorised modification and manufacture of spare parts
Unauthorised modification and manufacture of spare parts will impair
the safety of the product/personnel and void the manufacturer’s de-
clarations regarding safety.

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8 Installation and operating instructions • Wilo-Connect module BMS • Ed.02/2023-10
•Only carry out modifications to the product following consultation
with the manufacturer.
•Only use original spare parts and accessories authorised by the
manufacturer.
The use of other parts will absolve the manufacturer of liability for
any consequences arising therefrom.
2.7 Improper use
The operational reliability of the supplied product is only guaranteed
if used as intended and in accordance with section4 of the installa-
tion and operating instructions. The limit values must on no account
fall under or exceed those values specified in the catalogue/data
sheet.
3 Transport and storage
3.1 Scope of delivery
•Wilo-Connect module BMS
•Installation and operating instructions
3.2 Transport inspection
Check delivery immediately for damage and completeness. Where necessary make a complaint immediately.
CAUTION
Damage due to incorrect handling during transport and storage!
Protect the product from moisture, frost and mechanical damage during transport and tem-
porary storage.
Protect the product against temperatures outside the range of -30°C to +70°C.
Only store in original packaging.
4 Intended use
•The Wilo-Connect module BMS is designed for external control and operating status signalling of Wilo
pumps.
•The Wilo-Connect module BMS is not designed for safety-related deactivation of the pump.

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Installation and operating instructions • Wilo-Connect module BMS • Ed.02/2023-10 9
DANGER
Risk of fatal electrical shock!
If used improperly, there is danger of death due to electric shock!
• Never use the control inputs for safety functions.
• Never install the module in non-compatible devices.
4.1 Compatibility of the firmware
The module’s full range of functions is only guaranteed for pumps with Wilo-Connectivity Interface:
Pump Comments
Wilo-Stratos PICO
Wilo-Stratos PICO plus
with Wilo-Connectivity Interface (model from 2022)
Wilo-Stratos PICO-Z with Wilo-Connectivity Interface (model from 2023)
NOTICE
When the module is installed, the software version of the module can be called up via the
“SW version” menu and is shown on the pump display.
For compatibility with products not listed above, see
www.wilo.de/automation (German), www.wilo.com/automation (English).
5 Product information
5.1 Type key
Example: Wilo-Connect module BMS
Connect module Function interface
BMS = for Building Management Systems
5.2 Technical data
Technical data
General data
Ambient temperature -10°C to +60°C
Storage temperature -30°C to +70°C
Protection class IP55
Module mating cycles Max.50
Terminal cross-section Max. 1.5mm² (solid or finely stranded without end
sleeves)
Electric circuit SELV, galvanically isolated

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10 Installation and operating instructions • Wilo-Connect module BMS • Ed.02/2023-10
Technical data
SSM/SBM interface relay output
Cable length 200m (max.)
Version Potential-free
Safety in accordance with EN60335 Mains voltage up to 230V *)
Voltage range 5…250VAC
12…30VDC
Current load AC: 5A max. AC1
DC: 5A max. DC1
Digital input (configurable)
Interface For potential-free contact, or 24VDC input voltage
Cable length 200m (max.)
Version SELV, isolated
No-load voltage Min. 3.3V
Dielectric strength Max. 30VDC
Loop current Approx. 3.3mA
Analogue input 0-10
Version*SELV, isolated
Cable length 200m (max.)
Input resistance > 10kOhm
Voltage range 0…10V
Accuracy 5% absolute
Dielectric strength Max. 24VDC
*) When connecting to IT networks (Isolé Terre electrical system), always make sure that the voltage
between the live wires (L1-L2, L2-L3, L3-L1) does not exceed 230V. In case of fault (earth fault), the
voltage between the live wire and PE must not exceed 230V.
6 Description and function
The Wilo-Connect module BMS adds communication interfaces for controlling and reporting operating states
to the pump.
The module is connected to the pump via the Wilo-Connectivity Interface (slot for external modules).
NOTICE
Observe the installation and operating instructions of the respective pump!

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Installation and operating instructions • Wilo-Connect module BMS • Ed.02/2023-10 11
2
1 (5)
4
3
8 (9) 6 7
Item Designation Explanation
1 LED (display of the operating status) lights up green: module is ready for operation
2 Plug connection (lockable) to the Wilo-Connectivity Interface of the pump
3 2 threaded cable glands M 20, pre-assembled in vertical alignment
4 Alternative cable connection for threaded cable glands in horizontal alignment
(5) Wilo-Connectivity Interface slot for supplementary modules (planned expansion)
6 Analogue input 0-10V for setpoint adjustment with corresponding control mode
7 Digital input (configurable) for potential-free contact or 24V
8 Digital output as changeover contact relay (SSM/SBM)
(9) Input 24V external power supply (planned extension)
The following communication interfaces are available and are set via the pump controls:
6.1 Analogue input 0-10V
Depending on the set control mode, the pump setpoint is adjusted via the 0-10V signal.
The 0-10V signal can be interpreted in different ways.
NOTICE
Transfer curves
The specification “w” in the following transfer curves refers to the setting of the setpoints
for delivery head, speed and temperature.
max
w
min
Off
1 2 3 10 U/V
0-10V with off
Setpoint adjustment of the selected control mode with switch-
ing off the pump.
U < 1V: Pump stops
2V < U < 3V: Pump runs at minimum setpoint (start)
1V < U < 3V: Pump runs at minimum setpoint (operation)
3 V < U <10 V: Setpoint varies between minimum and maxi-
mum value (linear)

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12 Installation and operating instructions • Wilo-Connect module BMS • Ed.02/2023-10
max
min
1 2 3 10 U/V
w
04 5 6789
0-10V no off
Setpoint adjustment of the selected control mode without
switching off the pump.
0V < U < 10V: Setpoint varies between minimum and maxi-
mum value (linear)
max
w
min
Off
12,5 310 U/V
0
2-10V CB detec.
Setpoint adjustment of the selected control mode with cable
break detection.
U < 1V: Cable break detected; pump runs at configured set-
point (emergency operation)
1V < U < 2.5V: Pump stops
2.5V < U < 3V: Pump runs at minimum setpoint
3 V < U <10 V: Setpoint varies between minimum and maxi-
mum value (linear)
max
w
min
0 0.5 8.5 8.8 9.3 10 U/V
Off
10-0V solar
Setpoint adjustment of the selected control mode.
U < 0.5 V: Pump runs at maximum setpoint
0.5V < U < 8.5V: Setpoint decreases linearly from maximum to
minimum value
8.5V < U < 9.3V: Pump runs at minimum setpoint (operation)
8.5V < U < 8.8V: Pump runs at minimum setpoint (start)
9.3V < U < 10V: Pump stops
6.2 Digital input
Input for potential-free contact or 24V digital signal of an external control (e.g. PLC).
The following functions can be selected and activated via the digital input of the module:
Ext. OFF:
•Contact open (or 0V applied): Pump off.
•Contact closed (or 24V applied): Pump is working in control mode.
Ext. MIN:
•Contact open (or 0V applied): Pump is working in control mode.
•Contact closed (or 24V applied): Pump runs at set, reduced speed (night setback).
Ext. MAX:
•Contact open (or 0V applied): Pump is working in control mode.
•Contact closed (or 24V applied): Pump is running with maximum speed.
6.3 Digital output (changeover contact relay)
The relay signals operating states depending on the configuration. The following functions can be selected:
SSM:
The signal for the collective fault signal (SSM) is available at the potential-free NC contact (COM - NC).
SSM can only signal as fault “SSM only errors”, or fault and warnings “SSM err & warn.”. The selection is made
in the configuration of the module via the pump controls.

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Installation and operating instructions • Wilo-Connect module BMS • Ed.02/2023-10 13
•Contact closed: Pump is working in the specified operating mode or is de-energised.
•Contact open: Pump has a fault.
SBM:
The signal for the collective run signal (SBM) is available at the potential-free normally open contact (COM -
NO).
SBM can signal different operating states. The selection is made in the configuration of the module via the
pump controls.
•Contact closed: Pump signals the desired operation or the selected operational readiness.
•Contact open: Selected operational readiness or selected operation is not in place.
6.4 Other functions
Pump kick
Prevents deposits that can form during prolonged downtime.
If the pump is switched off via the control input with the Ext. OFF function or 0-10V, it is started for a short
time every day during downtime.
Voltage must be applied to the pump at all times for this function to be activated.
LED
The Wilo-Connect module BMS has an LED to indicate the operating status.
•Green: Module is ready for operation
•Off: Module is not ready for operation
Extensions under preparation
The following extensions are under preparation and still don’t work:
•Wilo-Connectivity Interface
Slot for additional modules (below the lockable module cover)
CAUTION!Do not connect any modules !
•Input 24V
Connection for external power supply 24V
CAUTION!Do not connect any voltage !
7 Installation and electrical connection
Electrical connection may only be carried out by a qualified electrician and in accordance with the applicable
regulations!
DANGER
Risk of fatal electrical shock!
Avoid dangers caused by electrical currents!
• Local directives and general directives [e.g., IEC, VDE, etc.] and instructions from local
energy supply companies must be adhered to.

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14 Installation and operating instructions • Wilo-Connect module BMS • Ed.02/2023-10
DANGER
Risk of fatal electrical shock!
Before all work deactivate power supply and guard against accidental switch-on. Due to the
presence of dangerous contact voltage, work on the control module must not be started un-
til 5minutes have elapsed.
• Check whether all connections (including potential-free contacts) are voltage-free.
• Never reach into the open control module and never drop or insert objects into the open-
ing.
• Never switch on the pump if the cover or the module is not properly attached.
WARNING
Risk of personal injury!
• Adhere to existing accident prevention regulations.
WARNING
Risk of burns from hot surfaces!
Pump housing and glandless motor can get hot and cause burns when touched.
• Only touch the control module during operation.
• Allow the pump to cool down before commencing any work.
NOTICE
Observe the installation and operating instructions of the respective pump!
7.1 Installation
The installation of the Wilo-Connect module is described in the Stratos PICO installation and operating in-
structions.
CAUTION
Moisture and leakage water can destroy the control module.
Only work on an open module in a dry environment.
The Wilo-Connect module BMS is plugged into the Wilo-Connectivity Interface, below the lockable module
cover of the pump:
•Open module cover

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Installation and operating instructions • Wilo-Connect module BMS • Ed.02/2023-10 15

•Using a screwdriver, pull
out the latches on both
sides of the module cover
(1).

•Carefully remove the
module cover (2) and
store it in a safe place.
•Remove the dust cap from the plug contact.
•Carefully attach the Connect module.
•Push the latches on both sides of the module cover back in until they click into place.
NOTICE
The IP protection of the pump is only guaranteed with a fully locked module.
Fixation with screws
Optionally, the Wilo-Connect module BMS can be fixed with the self-tapping screws included in the scope of
delivery.
CAUTION
Property damage due to electrostatic discharge.
Electrostatic discharges can destroy sensitive electronic components.
• Observe measures for handling electrostatic sensitive components (EDS)!
Loosen the 4 screws of the module cover and remove the cover:
•Remove the two upper printed circuit boards in the module.
–This makes the 2 screw domes next to the plug contact accessible.
•Position the module in the slot provided.
•Insert the self-tapping screws through the screw domes and screw the module housing to the product.
•Then close the two screw domes with the plugs included in the scope of delivery.
•Professionally reinstall the two printed circuit boards.
7.2 Electrical connection
DANGER
Risk of fatal electrical shock!
Electrical connection must be carried out by an electrician authorised by the local energy
supply company and in accordance with the applicable local regulations [e.g. VDE regula-
tions].
•Carry out installation as described in the previous section.
•Carry out electrical installation of the pump as specified in the relevant installation and operating instruc-
tions.

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16 Installation and operating instructions • Wilo-Connect module BMS • Ed.02/2023-10
•Check the technical data of the electric circuits being connected to ensure they are compatible with the
electrical specifications of the Wilo-Connect module BMS.
•Connect wires as illustrated.
Wilo-Connect module BMS connection:
0-10 V
- +
Analogue input 0-10V
(Purple terminal)
for setpoint adjustment with corresponding control mode
Digital input
(Light-grey terminal)
with potential-free contact (switch or relay)
GND (-) 24 V
with 24V digital output signal of an external control.
ATTENTION! Note for connecting 24V digital output sig-
nal to digital input:
•Connect the common ground point (GND) to the neg-
ative terminal of the analogue input terminal.
•Connect the 24V signal to the digital input terminal,
with the arrow pointing towards the terminal (input).
Parallel use of the analogue input remains possible when
using the common ground point.
SSM
Relay output
(Red terminal)
Connection as collective fault signal (SSM)
SBM
Connection as collective run signal (SBM)

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Installation and operating instructions • Wilo-Connect module BMS • Ed.02/2023-10 17
DANGER
Risk of fatal electrical shock!
For voltage > 30VAC or > 42.4VDC:
• To prevent a wire that has become loose from the terminal from wandering to the SELV,
the supplied cable sleeve must be used as illustrated in Fig. (1).
S E L V
> 30 V AC
> 42,4 V DC
(1)
Connecting a voltage
> 30VAC or > 42.4VDC
8 Commissioning/ Functional test
NOTICE
Testing in conjunction with the connected installation is recommended.
For some settings, the installation and operating instructions for the pump are required.
8.1 Settings
The Wilo-Connect module is set via the operating elements of the connected pump.
The operating modes and basic menu descriptions of the pump are described in the respective installation
and operating instructions.
Main menu (Homescreen)
The main menu shows the current settings/statuses of the pump in operation (example setting).
1
2
Item 1:
Blue frame around the setpoint display field:
The Wilo-Connect module BMS controls the pump. A set-
point adjustment on the pump’s operating button is not
possible.
Item 2:
Active influences: Current signal input on the Wilo-Con-
nect module BMS that influences the pump:
0-10V, Ext. OFF, Ext. MAX, Ext. MIN
Select “External module” in the main menu

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18 Installation and operating instructions • Wilo-Connect module BMS • Ed.02/2023-10
All other settings and functions for the Wilo-Connect mod-
ule BMS (WCM BMS) are made in this menu.
NOTICE!Abbreviated texts of the selection menus
and setting dialogues are fully described in the fol-
lowing menu structure.
8.1.1 Menu structure
Menu selection Possible settings
WCM BMS
Analogue input Not used
0-10V with off
0-10V no off
2-10V CB detec.
10-0V solar
2-10V CB detec. Max setpoint
Min setpoint
No cable break detection
Digital input Not used
Ext. OFF
Ext. MAX
Ext. MIN
Ext. MIN set. 5%…50%
Relay function Not used
SSM only errors
SSM err & warn
SBM motor in operation
SBM ready op.
SBM power ready
Relay active delay 0s…60s
Relay inactive delay 0s…60s
Relay test ctrl Normal
Forced active
Forced inactive
SW version (Information)
Stacked WCM Yes
No

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Installation and operating instructions • Wilo-Connect module BMS • Ed.02/2023-10 19
8.1.2 Configure analogue input 0-10V
The analogue input of the module can be adapted for various applications.
Settings are made via the pump operating element. Select menu:
WCM BMS Analogue input
Not used (factory setting)
No 0-10V signal is evaluated.
The analogue input is not active and does not influence the
pump’s function.
The setpoint can still be adjusted via the pump’s operating but-
ton.
NOTICE
Transfer curves for the 0-10V signal are described in Section 6.1.
When control via the 0-10V signal is activated, no setpoint adjustments of the control
mode can be made via the pump’s operating button.
0-10V with off
The analogue input controls the pump’s setpoint, depending on the set control mode (e.g. Δp-c or Δp-v).
The pump switches off at a voltage of < 1V.
0-10V no off
The 0-10V signal is evaluated across the entire voltage range to adjust the setpoint of the set control mode.
2-10V CB detec.
The 0-10V signal is evaluated as a 2-10V signal. The analogue input controls the pump’s setpoint, depend-
ing on the set control mode (e.g. Δp-c or Δp-v).
Cable break detection is active thanks to this characteristic curve. If the voltage is too low (< 1V), this is re-
cognised as a cable break. You can set special behaviour for a detected cable break.
10-0V solar
The 0-10V signal is evaluated as with a pump for solar thermal technology systems. The analogue input
controls the pump’s setpoint.
8.1.2.1 Configure cable break reaction
If the analogue input is configured for a 2-10V CB detec., the following settings can be used to select the
reaction to a detected cable break. Select menu:
WCM BMS 2-10V CB detec.

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20 Installation and operating instructions • Wilo-Connect module BMS • Ed.02/2023-10
Max setpoint (factory setting)
If a cable break is detected, the maximum setpoint is specified.
Min setpoint
If a cable break is detected, the minimum setpoint is specified.
No CB detection
No cable break reaction: if a cable break is detected (< 1V), the
pump is switched off.
8.1.3 Configure digital input
A selectable function can be controlled via the digital input.
Settings are made via the pump operating element. Select menu:
WCM BMS Digital input
Not used (factory setting)
The digital input is not active and does not influence the
pump’s function.
Ext. OFF
The pump is switched on and off.
Contact closed: The pump runs in the set operating mode.
Contact open: The pump is switched off.
The pump kick function is active (see Section 6.4).
Ext. MAX
The pump switches between normal operation and override with a maximum setpoint.
Contact closed: Pump is running with maximum speed.
Contact open: Pump runs in the set operating mode.
Ext. MIN
The pump switches between normal operation and override with a minimum setpoint.
Contact closed: Pump runs at set, reduced speed (night setback).
Contact open: Pump runs in the set operating mode.
8.1.3.1 Ext. MIN set. Setting
Allows the setpoint to be adjusted when the Ext. MIN function is triggered via the digital input. Select menu:
WCM BMS Ext. MIN set.
The minimum speed depends on the respective pump.
It is possible that the achievable minimum speed is too low for
many applications. The setting via the Ext. MIN set. allows the
corresponding speed to be adjusted.
The figure is given as a percentage (%). The value specifies a
speed that reaches a percentage of the maximum delivery head
at zero volume flow.
Possible setting: 5%…50% in 5% steps.
Factory setting: 20%