Resol WMZ-G1 User manual

Thank you for buying this RESOL product.
Please read this manual carefully to get the best performance from this unit.
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Manual
en
Calorimeter
Manual for the
specialised craftsman
Mounting
Connection
Operation
*48004731* 48004731
WMZ-G1

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Safety advice
Please pay attention to the following safety advice in order to avoid danger and
damage to people and property.
Instructions
Attention must be paid to the valid local standards, regulations and directives!
Information about the product
Proper usage
TheWMZ-G1 is to be used for the measurement and the display of system data by
means of Grundfos Direct Sensors™ in compliance with the technical data specied
in this manual.
Improper use excludes all liability claims.
CE Declaration of conformity
The product complies with the relevant directives and is therefore la-
belled with the CE mark.The Declaration of Conformity is available on
request, please contact the manufacturer.
Note
Strong electromagnetic elds can impair the function of the device.
ÎMake sure the device as well as the system are not exposed to strong
electromagnetic elds.
Target group
These instructions are exclusively addressed to authorised skilled personnel.
Only qualied electricians should carry out electrical works.
Initial installation must be effected by the system owner or qualied personnel
named by the system owner.
Description of symbols
WARNING! Warnings are indicated with a warning triangle!
ÎThey contain information on how to avoid the dan-
ger described.
Signal words describe the danger that may occur, when it is not avoided.
• WARNING means that injury, possibly life-threatening injury, can occur.
• ATTENTION means that damage to the appliance can occur.
Note
Notes are indicated with an information symbol.
ÎArrows indicate instruction steps that should be carried out.
Disposal
• Dispose of the packaging in an environmentally sound manner.
• Dispose of old appliances in an environmentally sound manner. On request we
will take back your old appliances bought from us and guarantee an environmen-
tally sound disposal of the devices.

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WMZ-G1 Calorimeter
The WMZ-G1 is a measurement and display unit for solar thermal systems and
conventional heating systems. It is possible to connect up to two Grundfos Direct
SensorsTM, which measure the temperature as well as one additional value – de-
pending on the type: ow rate, relative or differential pressure.
Heat quanity measurement is possible when two Grundfos Direct SensorsTM are
connected and at least one of them is a VFS type sensor.The WMZ-G1 also moni-
tors the operating status of the system and displays deviations.
Contents
1 Installation ........................................................................................... 5
1.1 Mounting ........................................................................................................................5
1.2 Electrical connection ...................................................................................................5
1.3 Data communication / Bus ..........................................................................................6
2 Operation and function ...................................................................... 7
2.1 Push buttons for adjustment .....................................................................................7
2.2 Menu structure .............................................................................................................7
2.3 Initial commissioning....................................................................................................7
2.4 Operating control lamp ..............................................................................................8
3 Measured values .................................................................................. 8
4 Balance values...................................................................................... 8
5 Adjustment values............................................................................... 9
6 Reports ............................................................................................... 12
7 Examples of connection.................................................................... 14
8 VBus®board ....................................................................................... 15

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Technical Data:
Housing: plastic, PC ABS and PMMA
Protection class: IP 20 / DIN 40050
Ambient temperature: 0 … 40 °C
Size: 172 x 110 x 47 mm
Installation: wall mounting, mounting into patch panels is possible
Operation: 3 push buttons at the front of the housing
Inputs: 2 Grundfos Direct Sensors™VFS, RPS or DPS
Power supply: 220 … 240 V~
104 mm
4.1"
130 mm
5.1“
2.6"
66 mm
4.3"
110 mm
6.8"
172 mm
1.1"
28 mm
0.4" / 11 mm
1.9" / 49 mm
0.5" / 13 mm
6.1" / 155 mm
upper fastening
lower fastening
Overview
• Recording of:
ow temperature
return temperature
power
heat quantity
ow rate
pressure
differential pressure
system errors
• Especially for Grundfos Direct Sensors™
• Easy connection
• Dot matrix display
• Function control
• Congurable control parameters

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1 Installation
1.1 Mounting
WARNING! Electric shock!
Upon opening the housing, live parts are exposed!
ÎAlways disconnect the device from power supply
before opening the housing!
Note
Strong electromagnetic elds can impair the function of the device.
ÎMake sure the device as well as the system are not exposed to strong
electromagnetic elds.
The device must only be located in dry interior rooms.
The device must additionally be supplied from a double pole switch with contact
gap of at least 3 mm.
Please pay attention to separate routing of sensor cables and mains cables.
In order to mount the device to the wall, carry out the following steps:
ÎUnscrew the crosshead screw from the cover and remove it along with the
cover from the housing.
ÎMark the upper fastening point on the wall. Drill and fasten the enclosed wall
plug and screw leaving the head protruding.
ÎHang the housing from the upper fastening point and mark the lower fastening
point (centres 130 mm).
ÎInsert lower wall plug.
ÎFasten the housing to the wall with the lower fastening screw and tighten.
ÎCarry out the electrical wiring in accordance with the terminal allocation (see
chap. 1.2).
ÎPut the cover on the housing.
ÎAttach with the fastening screw.
display
push button
fuse T4A
cable conduits with
strain relief
cover
1.2 Electrical connection
WARNING! Electric shock!
Upon opening the housing, live parts are exposed!
ÎAlways disconnect the device from power supply
before opening the housing!
ATTENTION! ESD damage!
Electrostatic discharge can lead to damage to electronic com-
ponents!
ÎTake care to discharge properly before touching
the inside of the device!
Note
Connecting the device to the power supply must always be the last step
of the installation!
Note
It must be possible to disconnect the device from the mains at any time.
ÎInstall the mains plug such that it is accessible at any time.
ÎIf this is not possible, install a switch that can be accessed.
Do not use the device if it is visibly damaged!
The power supply of the device must be carried out via an external power supply
switch only (last step of installation!) and the line voltage must be 220 … 240 V
(50 … 60 Hz). Flexible lines have to be attached to the housing by means of the
enclosed strain relief and screws.

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The device is equipped with 1 relay to which a load can be connected:
Relay 1
R1 = conductor R1
N = neutral line N
12, 13, 14 = grounding ⌯
The sensors (S1, S2) are connected to the following terminals:
The RESOL VBus®connection is carried out at the terminals marked “VBus”
with either polarity.
Mains connection is at the mains terminals (see gure):
N = neutral line N
L = conductor L
12, 13, 14 = grounding ⌯
Note
The device must be grounded in order to function faultlessly.
ÎGround the device properly.
mains terminals
load terminalssensor terminals
ground terminals
VBus terminals
T-1
S1
LNR1N
20191817141312
2 (1)A(220 ... 240) V~
T4A
Q-1
GND
+5V
T-2
Q-2
GND
+5V
S2
Netz / Mains
220 ... 240V~
VBus
9 10
fuse
T-1
S1
LNR1N
20191817141312
2 (1)A(220 ... 240) V~
T4A
Q-1
GND
+5V
T-2
Q-2
GND
+5V
S2
Netz / Mains
220 ... 240V~
VBus
9 10
T-1/ T-2 Q-1 / Q-2 GND +5V
yellow white green brown
temperature signal 1 / 2 ow rate signal 1 / 2 (or relative pres-
sure signal or differential pressure signal
depending on the sensor type)
ground supply
1.3 Data communication / Bus
VBus
9 10
VBus®terminals
TheWMZ-G1 is equipped with the RESOLVBus®for data transfer with and energy
supply to external modules. The connection is carried out at the two terminals
marked “VBus” (either polarity). One or more RESOLVBus®modules can be con-
nected via this data bus:

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2 Operation and function
2.1 Push buttons for adjustment
1
3
2
backward (-) forward (+)
OK
(selection / adjustment)
The device is operated via 3 push buttons below the display.The forward-button
(1) is used for scrolling forward through the menu or to increase the adjustment
values.The backwards-button (2) is correspondingly used for the reverse function.
ÎSelect the desired sub-menu using buttons 1 and 2
ÎBriey press button 3 in order to enter the sub-menu,
ÎThe selected sub-menu is now shown on the display. By pressing the “back”-
button, the display returns to the former menu level.
ÎPress buttons 1, 2 and 3 several times until the desired menu line is reached.
ÎBriey press button 3 in the relevant menu line for modication of adjustment
values – “change value” appears on the display – adjust the requested value by
pressing buttons 1 and 2
ÎBriey press button 3 in order to conrm the adjustment.
ÎPlease reply to the following security inquiry“Save?” by choosing “yes” or “no”
(buttons 1 and 2) and conrm with button 3.
Note
If button 3 is kept pressed for 2 seconds, the display goes back to the main
menu
2.2 Menu structure
MainMenu
1. Measuredvalues
2. Reports
3. Balancevalues
4. Adjust.values
The clear text display shows a 4-line extract of the selected menu.
In the rst line of each submenu you will nd the option “back” (except in submenu
“measured values”), by means of which you can return to the former display level.
After a short time of operation, the display switches to the submenu “measured
values” which is then indicated during normal operation.
2.3 Initial commissioning
Adj. values:
language english
Date 01.01.2009
Time 00:00
ÎEstablish the power supply
In the “Adjust.Values“ menu, carry out the adjustments mentioned below. For fur-
ther information on the adjustment values, see chap. 5.
Language:
ÎSelect the menu item “Language“ with button 1 and conrm with button 3
ÎSelect the desired language with buttons 1 and 2
ÎIn order to conrm the selection, briey press button 3 and answer the secu-
rity inquiry with “Yes“
ÎIn order to change to the adjustment values menu, select the menu item
“back“ and conrm with button 3
The following languages are available: German (“Deutsch“), English, Spanish (“Cas-
tellano“), French (“Français“), Italian (“Italiano“).The factory setting is “English“.
Date:
ÎSelect the menu item “Date“ with button 1 and conrm with button 3
ÎAdjust the year, the month and the day with buttons 1 and 2 and conrm each
with button 3
ÎIn order to conrm the adjustment, briey press button 3 and answer the
security inquiry with “Yes“

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Time:
ÎSelect the menu item “Time“ with button 1 and conrm with button 3
ÎAdjust the hours and the minutes with buttons 1 and 2 and conrm each with
button 3
ÎIn order to conrm the adjustment, briey press button 3 and answer the
security inquiry with “Yes“
2.4 Operating control lamp
The device is equipped with a red/green operating control lamp. The following
operating states can be visualised:
• green constant normal operation;
• green ashing measured value outside alarm limit
• red ashing defective sensor
• not illumated no voltage
3 Measured values
In the submenu “Measured values”, different measurement values are shown: the
measured values depend on the sensor type and can be the following:
S1:
T1: 74,8 °C
P1: 0,14 bar
P: 9 W
S2:
T2: 23,9 °C
Q2: 5,55 l/min
Heat: 19944 Wh
Sensor 1: T1 (temperature in °C or °F)
p1 (pressure in bar)
Q2 (ow rate in l/min, m³/h or gallon/h)
P (in W) – values over 999,999 W cannot be processed. In such a case,
both the displayed value and the VBus®data packet value remain at
999,999 W.
Sensor 2: T2 (temperature in °C or °F)
p2 (pressure in bar)
Q2 (ow rate in l/min, m³/h or gallon/h)
Heat (in Wh, kWh, MWh, kJ, MJ or GJ.)
Note
“Power” and “Heat” are only indicated when at least one of the sensors
connected is aVFS type sensor and the option “Heatmeter” in the subme-
nu “Adj. values” has previously been set to “Yes”.
4 Balance values
Note
The indicated balance values depend on the selected sensor type!
Display of balance values “Sensor 1”:
Sensor 1
Temperature:
Min 23,8 °C
Max 172,0 °C
Sensor 2
Temperature:
Min 0,0 °C
Max 23,9 °C
• Temperature:
Min: minimum temperature at sensor 1 in °C or °F
Max: maximum temperature at sensor 1 in °C or °F
• Pressure:
Min: minimum pressure at sensor 1 in bar
Max: maximum pressure at sensor 1 in bar
• Diff-Pressure:
Min: minimum differential pressure at sensor 1 in bar
Max: maximum differential pressure at sensor 1 in bar
• Flow rate:
Min: minimum ow rate at sensor 1 in l/min, m³/h, gallon/h
Max: maximum ow rate at sensor 1 in l/min, m³/h, gallon/h
Acc: accumulated volume since commissioning / last reset in l, m³ or gallons
Display of balance values “Sensor 2”:
• Temperature:
Min: minimum temperature at sensor 2 in °C or °F
Max: maximum temperature at sensor 2 in °C or °F
Pressure:
Min 0,14 bar
Max 0,14 bar
• Pressure:
Min: minimum pressure at sensor 2 in bar
Max: maximum pressure at sensor 2 in bar

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Diff-Pressure:
Min 0,14 bar
Max 0,14 bar
• Diff-Pressure:
Min: minimum differential pressure at sensor 2 in bar
Max: maximum differential pressure at sensor 2 in bar
Flow rate:
Min 5,55 l/min
Max 6,11 L/min
Acc 4322,7 l
• Flow rate:
Min: minimum ow rate at sensor 2 in l/min, m³/h, gallon/h
Max: maximum ow rate at sensor 2 in l/min, m³/h, gallon/h
Acc: accumulated volume since commissioning / last reset in l, m³ or gallons
In this submenu, the balance values for “Sensor 1”, “Sensor 2” and “Others” are
indicated. When “Heatmeter” has previously been set to “Yes” in the submenu
“Adj. values”, the balance values for this item are also indicated.The balance values
refer to the period of time the device has been in use. If these values are reset to
zero, a new operating period starts.
balance values
heatmeter
heat 62254 Wh
Display of balance values “Heatmeter”:
• Heat:
Heat quantity in Wh, kWh, MWh, kJ, MJ or GJ.
balance values
others
operating days 0
Display of balance values “Others”:
• Operating days:
Number of operating days
5 Adjustment values
In this menu the parameters and values for Sensor 1 and Sensor 2, heat quantity
measurement and bus mode can be selected and adjusted. Furthermore, date and
time have to be set in this menu, see chap. 2.3.
Each sensor has two signals. The rst signal of each sensor refers to temperature.
The second signal of each sensor depends on the sensor type which can either be
VFS for ow rate, RPS for relative pressure or DPS for differential pressure.
Signal 1
Select and adjust the parameters and values for the selected sensor
Sensor 1
Auto-detect …
Type RPS- …
Range 0-0,6 bar
• Auto-detect …
Start automatic sensor identication
If you select auto-detect, the sensor identies itself: type and sensor range are
transmitted to the device. If no automatic detection is possible, the type and range
of the sensor can be adjusted manually.
• Type:
Select the sensor type by choosing between:
Off: no sensor type is selected
VFS: Flow rate sensor: sensor for detecting ow rate
RPS: Relative Pressure Sensor: sensor for detecting relative pressure
DPS: Differential Pressure Sensor: sensor for detecting differential pressure
• Range:
Select the sensor range.
The range depends on the previously selected sensor type (see tables to the left).
VFS Range:
Custom:
Min: 1-19,99 l/min,
Max: 1,01-600,00 l/min
1-20 l/min
2-40 l/min
5-100 l/min
10-200 l/min
20-400 l/min
RPS Range:
Custom: Min: 0,00-39,99 bar,
Max: 0,01-40,00 bar
0-0,6 bar
0-1 bar
0-1,6 bar
0-2,5 bar
0-4 bar
0-6 bar
0-10 bar
0-16 bar
0-25 bar
0-40 bar
DPS Range:
Custom:
Min: 0,00-15,99 bar,
Max: 0,00-16,00 bar
0-0,6 bar
0-1 bar
0-1,6 bar
0-2,5 bar
0-4 bar
0-6 bar
0-10 bar
0-16 bar

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Adjust the parameters referring to temperature (signal 1):
Adj. values:
Temperature
unit °C
offset 0,0 °C
• Unit:
Select the unit of temperature.A selection can be made between °C and °F.
• Offset:
A sensor offset can be carried out.
Adjustment range: -99,9 … 99,9 °C or °F
min alarm yes
min 0,0 ° C
max alarm yes
max 100,0 ° C
• Min Alarm:
If the minimum temperature is reached, the relay is energised, ⚠appears in the
display, the LED ashes green and an alarm message appears in the submenu “Re-
ports”.
ÎSelect “Yes” or “No” to activate or deactivate the function.
If this function is selected, the minimum value for the alarm has to be adjusted.
Adjustment range: -888,8 … 999,9 °C or °F.
• Max Alarm:
If the maximum temperature is reached, the relay is energised, ⚠appears in the
display, the LED ashes green and an alarm message appears in the submenu “Re-
ports”.
ÎSelect “Yes” or “No” to activate or deactivate the function.
If this function is selected, the maximum value for the alarm has to be adjusted.
Adjustment range: -888,8 … 999,9 °C or °F.
Signal 2
Adjust the parameters and values for the second sensor signal.The second signal of
each sensor depends on the sensor type.Therefore, the following parameters and
adjustment values depend on the sensor type (ow rate for VFS, pressure for RPS,
differential pressure for DPS)
Adj. values:
flow rate
unit l/min
offset 0,0 L/min
Adjust the parameters referring to the ow rate (signal 2) if a VFS is used:
• Unit: Select the unit of ow rate.
A selection can be made between l/min, m³/h and gallon/h.
• Offset: An offset can be carried out.The adjustment range depends on the
previously selected unit.
min alarm yes
min 0,0 l/min
max alarm yes
max 100,0 L/MIN
• Min Alarm:
If the minimum ow rate is reached, the relay is energised, ⚠appears in the display,
the LED ashes green and an alarm message appears in the submenu “Reports”.
ÎSelect “Yes” or “No” to activate or deactivate the function.
If this function is selected, the minimum value for the alarm has to be adjusted.The
adjustment range depends on the previously selected unit.
• Max Alarm:
If the maximum ow rate is reached, the relay is energised, ⚠appears in the display,
the LED ashes green and an alarm message appears in the submenu “Reports”.
ÎSelect “Yes” or “No” to activate or deactivate the function.
If this function is selected, the maximum value for the alarm has to be adjusted.The
adjustment range depends on the previously selected unit.
Adjust the parameters referring to relative pressure (signal 2) if a RPS is used:
Adj. values:
Pressure
Offset 0,00 BAR
Min Alarm nO
• Offset:
An offset can be carried out.
Adjustment range: 0 … 99,99 bar

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min alarm yes
min 0,0 BAR
max alarm yes
max 12,0 BAR
• Min Alarm:
If the minimum relative pressure is reached, the relay is energised, ⚠appears in
the display, the LED ashes green and an alarm message appears in the submenu
“Reports”.
ÎSelect “Yes” or “No” to activate or deactivate the function.
If this function is selected, the minimum value for the alarm has to be adjusted.
Adjustment range: 0 … 99,9 bar
• Max Alarm:
If the maximum relative pressure is reached, the relay is energised, ⚠appears in
the display, the LED ashes green and an alarm message appears in the submenu
“Reports”.
ÎSelect “Yes” or “No” to activate or deactivate the function.
If this function is selected, the maximum value for the alarm has to be adjusted.
Adjustment range: 0 … 99,99 bar
Adjust the parameters referring to differential pressure (signal 2) if a DPS is used:
Adj. values:
diff.-Pressure
Min Alarm nO
Max Alarm nO
min alarm yes
min 0,0 BAR
max alarm yes
max 12,0 BAR
• Min Alarm:
If the minimum differential pressure is reached, the relay is energised, ⚠appears
in the display, the LED ashes green and an alarm message appears in the submenu
“Reports”.
ÎSelect “Yes” or “No” to activate or deactivate the function.
If this function is selected, the minimum value for the alarm has to be adjusted.
Adjustment range: 0 … 99,9 bar
• Max Alarm:
If the maximum differential pressure is reached, the relay is energised, ⚠appears
in the display, the LED ashes green and an alarm message appears in the submenu
“Reports”.
ÎSelect “Yes” or “No” to activate or deactivate the function.
If this function is selected, the maximum value for the alarm has to be adjusted.
Adjustment range: 0 … 99,9 bar
Heat quantity measurement
Heat quantity measurement is carried out by means of the difference between the
ow and the return temperature as well as the measured ow rate. If the function
is activated (factory setting), make the following adjustments:
Adjustments for heat quantity measurement.
adj. values:
Heatmeter yes
unit Wh
Type wAtER
• Heatmeter:
Heat quantity measurement can be activated or deactivated with this option.
adj. values:
Unit Wh
Type Propylene
Antifreeze 38%
• unit:
ÎSelect a unit for the indication of the heat quantity
The units Wh or kJ can be selected.
• Type:
ÎSelect the type of heat transfer uid
Water, Propylene, Ethylene or Tyfocor ®LS can be selected.
• antifreeze:
ÎAdjust the concentration of propylene or ethylene glycol in the heat trans-
fer uid
This adjustment channel is only visible if “Propylene” or “Ethylene” is selected
as “Type”.
Adjustment range: 20 … 70 %.
Note
The parameters and adjustments have to be selected and adjusted for
sensor 2 as well. For adjustment, please carry out the steps described
for sensor 1!

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6 Reports
Reports:
back
Everything OK
Version
In the submenu “Reports” different messages are indicated. During normal opera-
tion, the messages to the left are displayed.
Note
Error messages depend on the error and on the sensor type selected
previously!
Sensor 1
Reports:
Sensor 1
!Signal 1 fail
Signal failure at sensor 1, signal 1 (temperature).
Reports:
Sensor 1
!Signal 2 fail
Signal failure at sensor 1, signal 2 (this can be ow rate, relative pressure or dif-
ferential pressure depending on the sensor type).
Reports:
Sensor 1
!Max temp. alarm
The adjusted maximum temperature at sensor 1 is exceeded!
Reports:
Sensor 1
!Min temp. alarm
The temperature at sensor 1 has fallen below the adjusted minimum value!
VBus®adjustments
Adj. values:
VBus
Subaddress 0
Bus mode active
• Subaddress:
ÎAdjust a subaddress for a WMZ-G1
An individual module address can be adjusted for a WMZ-G1.This way, it is pos-
sible to use several WMZ-G1 with individual addresses in one system. If several
WMZ-G1 (up to 16 in total are possible) are connected to one PC or datalogger,
the WMZ-G1 have to be numbered serially, starting with 0. The connection se-
quence at the VBus®-connection is arbitrary.
Adjustment range: 0 … 15.
• Bus mode:
ÎAdjust the bus mode
Do not change the factory setting if the WMZ-G1 is connected to a RESOL con-
troller with VBus®output terminal (corresponds to the bus mode “Passive”).
Select bus mode “Active”, if the WMZ-G1 is not connected to a controller and if
data are recorded on a PC or datalogger.
Select bus mode “Cascaded”, if several WMZ-G1 are connected to a PC or data-
logger.The WMZ-G1 modules are serially numbered starting with 0 (see above).
Adjustment range:Active, Passive, Cascaded.
Adj. values:
Subaddress 0
Bus mode cascaded
Bus master yes
If subaddress “0” and bus mode “Cascaded” are selected, adjustments for the bus
master have to be made:
• Bus master:
ÎAdjust the bus master
Select bus master “No” when several WMZ-G1 modules are cascaded and used
along with a controller.
Select bus master “Yes” when several WMZ-G1 modules are cascaded and used
without a controller.
Note
For detailed examples of connection see chap. 7 on page 14 of this
manual.

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Reports:
Sensor 1
!Max flow alarm
The adjusted maximum ow rate at sensor 1 is exceeded!
Reports:
Sensor 1
!Min flow alarm
The ow rate at sensor 1 has fallen below the adjusted minimum value!
Reports:
Sensor 1
!Max press. alarm
The adjusted maximum relative pressure at sensor 1 is exceeded!
Reports:
Sensor 1
!Min Press. alarm
The relative pressure at sensor 1 has fallen below the adjusted minimum value!
Reports:
Sensor 1
!Max d.p. alarm
The adjusted maximum differential pressure at sensor 1 is exceeded!
Reports:
Sensor 1
!Min d.p. alarm
The differential pressure at sensor 1 has fallen below the adjusted minimum value!
Sensor 2
Reports:
Sensor 2
!Signal 1 fail
Signal failure at sensor 2, signal 1 (temperature).
Reports:
Sensor 2
!Signal 2 fail
Signal failure at sensor 2, signal 2 (this can be ow rate, relative pressure or dif-
ferential pressure depending on the sensor type)
Reports:
Sensor 2
!Max temp. alarm
The adjusted maximum temperature at sensor 2 is exceeded!
Reports:
Sensor 2
!Min temp. alarm
The temperature at sensor 2 has fallen below the adjusted minimum value!
Reports:
Sensor 2
!Max flow alarm
The adjusted maximum ow rate at sensor 2 is exceeded!

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Reports:
Sensor 2
!Min flow alarm
The ow rate at sensor 2 has fallen below the adjusted minimum value!
Reports:
Sensor 2
!Max press. alarm
The adjusted maximum relative pressure at sensor 2 is exceeded!
Reports:
Sensor 2
!Min Press. alarm
The relative pressure at sensor 2 has fallen below the adjusted minimum value!
Reports:
Sensor 2
!Max d.p. alarm
The adjusted maximum differential pressure at sensor 2 is exceeded!
Reports:
Sensor 2
!Min d.p. alarm
The differential pressure at sensor 2 has fallen below the adjusted minimum value!
7 Examples of connection
WMZ-G1 module in individual operation mode
• WMZ-G1: master board
subaddress:“0”
bus mode:“Active”
WMZ-G1 with controller
• controller: register WMZ-G1 module
• WMZ-G1: slave board
subaddress:“0”
bus mode:“Passive”
Cascade without controller
• WMZ-G1 0: master board
subaddress “0”
bus mode:“Cascaded”
bus master:“Yes”
• WMZ-G1 1 … 15: slave board
subaddress: 1 … 15*
bus mode:“Cascaded”
The connection sequence at the VBus®is arbitrary.

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Cascade with controller
WMZ-G1 0
controller
• controller: No adjustments have to be made (WMZ-G1 module
must not be registered!)
• WMZ-G1 0: slave board
subaddress:“0”
bus mode:“Cascaded”,
bus master:“No”
• WMZ-G1 1 … 15: Slave board
subaddress: 1 … 15*
Bus mode:“Cascaded”
The connection sequence at the VBus®is arbitrary.
* The maximum number of cascaded WMZ-G1 modules is 16.Whether this num-
ber can be reached depends on the construction.
Disturbing factors can be the following: distances, voltage- carrying lines etc.
8 VBus®board
Replacing the VBus®board
Note
When theWMZ-G1 is connected to a controller, theVBus®master board
has to be replaced with theVBus®slave board!.
Note
When several WMZ-G1 modules are cascaded and connected to a data-
logger or PC (see p. 14), only the VBus®master boards of the WMZ-G1
modules with the subaddress 1 or higher have to be replaced with the
VBus®slave boards!
WARNING! Electric shock!
Upon opening the housing, live parts are exposed!
ÎAlways disconnect the device from power supply
before opening the housing!
ATTENTION! ESD damage!
Electrostatic discharge can lead to damage to electronic com-
ponents!
ÎTake care to discharge properly before touching the
inside of the device!
123
ÎUnscrew the cross-head screw of the cover and remove the cover from the
housing.
ÎUnscrew the two lateral srews of the transparent shield and remove the shield.
ÎPull out the board which has to be replaced carefully.Replace with new board.
Carry out assembly in reverse order.
Note
The VBus®master board is marked with a “B”, the VBus®slave board with
a “J” in the upper right corner of the populated side of the board.

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Important note
The texts and drawings in this manual are correct to the best of our knowledge.As
faults can never be excluded, please note:
Your own calculations and plans, under consideration of the current standards and
directions should only be basis for your projects.We do not offer a guarantee for
the completeness of the drawings and texts of this manual - they only represent
some examples.They can only be used at your own risk. No liability is assumed for
incorrect, incomplete or false information and / or the resulting damages.
Note
The design and the specications can be changed without notice.
The illustrations may differ from the original product.
Imprint
This mounting- and operation manual including all parts is copyrighted. Another
use outside the copyright requires the approval of RESOL– Elektronische Rege-
lungen GmbH. This especially applies for copies, translations, micro lms and the
storage into electronic systems.
© RESOL – Elektronische Regelungen GmbH