Document revision 00 / 24.04.2019
FLOW permanent
Instruction Manual Modbus Extension Module
Supplement for the Instruction Manual Measurement Transmitter NivuFlow Energy Saver
Original manual: German, rev. 00 as of 18.04.2019
Instruction Manual/Supplement
1 General
General
Important Note
This instruction manual may exclusively – even in parts – be copied or translated in any
other way with the express written consent of NIVUS GmbH.
Disclaimer
The manufacturer assumes no liability
for damages owing to a change of this document. The manufacturer reserves the
right to change the contents of this document and this disclaimer at any time and
without any notice.
for damages to persons or objects resulting from failure to comply with applicable
regulations. For connection, commissioning and operation of the devices/sensors
all available information and higher local legal regulations (e. g. in Germany VDE
regulations) such as applicable Ex regulations as well as safety requirements and
regulations in order to avoid accidents shall be adhered to.
for damages to persons or objects resulting from improper use. For safety and
warranty reasons, all internal work on the instruments beyond from that involved in
normal installation and connection, must be carried out only by qualified NIVUS
personnel or persons or companies authorised by NIVUS.
for damages to persons or objects resulting from the use of instruments in techni-
cally imperfect condition.
for damages to persons or objects resulting from the use of instruments not in ac-
cordance with the requirements.
for damages to persons or objects resulting from failure to comply with safety in-
formation contained within this instruction manual.
for missing or incorrect measurement values or resulting consequential damages
due to improper installation.
2 Preconditions
WARNING
Instruction Manual for Extension Module not valid all by itself
This supplement cannot be considered as a fully adequate instruction manual by itself and
needs to be read and used always together with the NivuFlow Energy Saver transmitter
instruction manual.
This instruction manual is a supplement to the instruction manual for the NivuFlow Energy
Saver.
The following requirements shall be adhered to always and necessarily:
• Content-related knowledge of the NivuFlow Energy Saver instruction manual and the
according safety information.
• Experience in the operation of NIVUS NivuFlow transmitters.
• The sole purpose of this instruction manual is the installation of the Modbus Extension
Module (ZUB0 MOD AIN8) certified by NIVUS; components not verified and authorised
by NIVUS may cause damage to the entire measurement system NIVUS cannot be
held responsible for.
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Use in accordance with the requirements
3 Use in accordance with the requirements
The Type ZUB0 MOD AIN8 Modbus Extension Module is for the connection of external current signals to transmit current consumption and frequency to the NivuFlow Energy Saver
transmitter. The Extension Module is used for all pumps and frequency converters which
cannot be connected directly via Modbus.
4 Specifications
Article number ZUB0 MOD AIN8
Protection IP20
Storage temperature -40…+85 °C
Operating temperature 0…+55 °C
Max. humidity 95 % (non condensing)
Mounting On metal carrier (DIN rail), 35 mm
Dimensions (hxwxd) 100x86.5x71.1 mm;
Depth measured from top edge of carrier rail: 63.9 mm
Power supply 24 V DC (-25 % / +30 %), min. 500 mA
Modbus 1x RS485 using the accompanying pre-configured
connection cable
Inputs 8x 0/4…20 mA DC, passive, not galvanically isolated,
internal resistance (20 mA) < 100 Ω
Connection Cage clamp terminal, 0.08…2.5 mm²
Altitude 0…2000 m above MSL
Table 1 Specifications
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5 Functional Description
5.1 General
The Modbus Extension Module is suitable for the connection of 0/4…20 mA signals to the
NivuFlow Energy Saver transmitter.
The Modbus Extension Module is shipped in completed and configured condition and needs
to be installed and connected only.
5.2 Overview
Functional Description
1. Status-LED
2. Bus terminal clamp
3. Module 2 (AI5…AI8)
4. Module 1 (AI1…AI4)
5. Fieldbus coupler with power supply
6. Rotary encoding switch
7. Fieldbus connection RS485
8. Switch for RS485
Fig. 5-1 Overview Modbus Extension Module
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5.3 Connection of Analog Inputs
The analog inputs 1…4 are permanently assigned to module AI1, analog inputs 5…8 are
permanently assigned to module AI2.
The analog inputs are used exclusively for the power and frequency inputs of pumps 1…4.
Other functions are not available.
The assignment of the analog inputs to the terminal clamps on the modules is fixed and cannot be changed.
The following assignments apply:
• Module AI1
AI1 (1) Input Power Pump 1
AI2 (2) Input Frequency Pump 1
AI3 (3) Input Power Pump 2
AI4 (4) Input Frequency Pump 2
• Module AI2
AI1 (5) Input Power Pump 3
AI2 (6) Input Frequency Pump 3
AI3 (7) Input Power Pump 4
AI4 (8) Input Frequency Pump 4
Electric Installation
5.4 Parameter setting / Operation
Once cables and power supply are connected correctly the parameters of the Extension
Module are set via the NivuFlow Energy Saver. Therefore, the Extension Module does not
require any operation elements of its own.
6 Electric Installation
6.1 General
The Modbus Extension Module is shipped in completed and configured condition.
Do not change default settings of switches on the Modbus Extension Module
Changing the settings of the RS485 switches (Fig. 5-1 n
(Fig. 5-1 n
Connect the Modbus Extension Module to the transmitter only by using the accompanying/shipped Modbus-RTU connection cable (length approx. 1.3 m). One side of the Modbus Extension Module is equipped with a RS485 plug, the other side is open for connection
to the transmitter.
Connect only 1 conductor on each cage clamp terminal of the Modbus Extension Module.
The module´s metal carrier rail (DIN rail, 35 mm) must be earthed prior to initial opera-
tion.
o
6) may lead to communication failure between the module and the transmitter.
o
8) or the rotary encoding switches
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Electric Installation
6.2 Connection and wiring diagram of the Modbus Extension Module
Fig. 6-1 Connection and wiring diagram
6.3 Power Connection
No power supply via the transmitter
The Modbus Extension Module cannot be supplied via the transmitter directly due to its
high energy consumption.
Fig. 6-2 Power supply Modbus Extension Module
6.4 Connection to measurement transmitter NivuFlow Energy Saver
Connect the Modbus Extension Module to the transmitter only by using the accompanying
Modbus-RTU connection cable (length approx. 1.3 m).
Fig. 6-3 Connection Extension Module – transmitter
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Electric Installation
6.5 Connection of external Analog Inputs to the Modbus Extension Module
Connect only 1 conductor on each cage clamp terminal of the Modbus Extension Module.
Fig. 6-4 Connection external analog inputs – Extension Modules
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7 Parameter Setting
Set the parameters of the Modbus Extension Module by using the menu of the NivuFlow
Energy Saver.
Preconditions
• The Modbus Extension Module is correctly connected to the transmitter.
• The Modbus Extension Module is connected to the power supply module.
• The metal carrier rail is earthed.
Procedure
Set Pump(s) Parameters
1. Open the >Application< / >Pump< menu and check the “Active” checkbox for
Parameter Setting
pump 1.
The other pumps can be selected by clicking “Tab”.
Fig. 7-1 Open and activate pump
2. In “Type” use the pulldown menu to select the pump type >WAGO I/OExpander<.
Fig. 7-2 Select pump type and open the settings
3. Open the settings for the selected pump.
Select the (current) input range (0-20 mA or 4-20 mA) each for power and
frequency (pulldown menu).
4. In power and frequency specify the values for 0 mA or 4 mA and 20 mA.
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Parameter Setting
Fig. 7-3 Value input for power/frequency
5. After the settings for pump 1 are adjusted use the “Tab” key to proceed to pumps
2/3/4 if required and set the parameters accordingly.
Fig. 7-4 Activating and setting the parameters for further pumps
6. After finishing the pump parameter settings close the menu (back 3x) and save
the parameters.
Fig. 7-5 Save parameters
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