ZUCCHETTI Azzurro ComBox User manual

Identification: MD-AL-GI-00 Rev. 1.0 of 21/07/2021 - Application: GID
Zucchetti Centro Sistemi S.p.A. - Green Innovation Division
Via Lungarno, 248 - 52028 Terranuova Bracciolini - Arezzo, Italy
tel. [phone] - fax. [phone]
[e-mail] - [e-mail] –www.zcsazzurro.com
Pile Reg. IT12110P00002965 - Share Capital € 100,000.00 fully paid up
AR Company Reg. no. 03225010481 - REA AR no. 94189
ISO 9001 certified company - Certificate no. 9151 - CNS0 - IT-17778
COMBOX zero feed-in and consumption
monitoring system
INSTALLATION GUIDE

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Table of Contents
1. Introduction....................................................................................................................................................................................................4
1.1. Scope...............................................................................................................................................................................................4
1.2. Safety precautions.....................................................................................................................................................................5
2. Cabling and connection to the COMBOX.............................................................................................................................................5
2.1. COMBOX cabling ........................................................................................................................................................................6
2.2. DTSU meter configuration.....................................................................................................................................................7
2.3. Connection via LAN..................................................................................................................................................................9
2.4. Direct connection via MINI-USB cable ..........................................................................................................................10
2.5. Digital output ...........................................................................................................................................................................13
3. Installation and configuration..............................................................................................................................................................14
3.1. COMBOX and PV system with Ethernet dongle (ZSM-ETH-USB / ZSM-ETH-EXT) ....................................14
3.2. COMBOX and PV system with RS485 interface..........................................................................................................22
3.3. COMBOX and PV + HYD system with Ethernet dongle (ZSM-ETH-USB / ZSM-ETH-EXT)......................28
3.4. COMBOX and PV+HYD system with RS485 interface..............................................................................................30
3.5. COMBOX and Meter (ZSM-METER-DTSU)...................................................................................................................32
3.6. Activation of the Zero Feed-In function........................................................................................................................36
3.7. Checking the Zero Feed-In function................................................................................................................................38
4. Monitoring systems with COMBOX....................................................................................................................................................39
4.1. System with PV inverters....................................................................................................................................................39
4.2. System with PV + HYD inverter........................................................................................................................................40

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General instructions
This manual contains important safety precautions that must be followed and observed during the installation
and maintenance of the equipment.
Please keep these instructions!
This manual must be considered an integral part of the equipment, and must be available at all times to
everyone who interacts with the equipment. The manual must always accompany the equipment, even when
it is transferred to another user or plant.
Copyright statement
The copyright of this user manual belongs to Zucchetti Centro Sistemi S.p.A. No part of this manual (including
the software, etc.) may be copied, reproduced or distributed in any form or by any means without the
permission of Zucchetti Sistemi S.p.A. All rights reserved. ZCS reserves the right of final interpretation. This
manual is subject to change based on feedback from users, installers or customers. Please consult our website
at http://www.zcsazzurro.com for the latest version.
Technical support
ZCS offers a technical support and advice service that can be accessed by making a request directly from the
website https://www.zcsazzurro.com/it/support.
The following toll-free number is available for Italy: 800 72 74 64.
Preface
General information
Please read this manually carefully before proceeding with installation, operation or maintenance.
This manual contains important safety precautions that must be followed and observed during the installation
and maintenance of the equipment.
•Recipients
This manual is intended for qualified technical personnel (installers, technicians, electricians, technical
support personnel or anyone who is qualified and certified to operate a photovoltaic system), who are
responsible for installing and starting up the inverter in the photovoltaic system, and also for operators of the
system.

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1. Introduction
If you have problems or doubts in reading and understanding the
following information, please contact Zucchetti Centro Sistemi S.p.A.
through the appropriate channels.
Note
1.1. Scope
This manual describes the installation and configuration procedures of the ComBox product in combination
with one or more inverters, in order to perform the zero feed-in function:
Inverter Model
Minimum version of inverter FW
Protocol Model
3PH 3.3KTL/12KTL V3
V100011_10_14
3PH V3 or HYBRID
3PH 15000/24000 V3
V100004_03_14
3PH V3 or HYBRID
3PH 25KTL/50KTL V3
V040014_L02_I28
3PH V3 or HYBRID
3PH 60KTL/80KTL V3
V010007_06_07
3PH V3 or HYBRID
3PH 80KTL/110KTL-LV
V40006_06_11
3PH V3 or HYBRID
3PH 100KTL/136KTL-HV
V40006_06_11
3PH V3 or HYBRID
3PH HYD 5000/20000 ZSS
V100013_13_10
3PH V3 or HYBRID
3PH 50KTL/60KTL–V1
V2.52
50/60KTL-V1
3PH 100KTL-V4/110KTL-V4
V600002_01_01
3PH V3 or HYBRID
When combined with the ZSM-METER-DTSU three-phase meter, the product can also monitor consumption
on systems with ZCS inverters.
Before configuring the ComBox, check that the inverters are up to date with the latest Firmware available on
the ZCS website. If they are not, proceed with the update by following the procedure outlined on the product's
website page. Before installing the product, it is recommended to always update the FW and safety standards.
This guide is for ComBox devices updated to Firmware version 0.4.28.20230523 or higher. The FW version
can be checked by following the steps in section 2.4.
If the version is older or not shown, please contact ZCS for further assistance.

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1.2. Safety precautions
Read all instructions, precautions and warnings in this manual before installing and adjusting the product.
Before connecting the production equipment to the power grid, contact your local energy provider for quotas.
Furthermore, the connection should only be carried out by a qualified electrician.
Qualified personnel
During operation, inverters develop lethal voltages and overheat in some areas. Improper installation or
malfunctioning could lead to serious damage and injury. To reduce the risk of personal injury and to ensure
safe installation and operation of the product, the transport, installation, commissioning and maintenance
operations should only be carried out by a qualified electrician. Zucchetti Centro Sistemi S.p.A. accepts no
liability or responsibility for the destruction of property and personal injury resulting from improper use.
Electrical connection
Make sure to comply with the current electrical regulations on accident prevention when handling the
inverter.
2. Cabling and connection to the COMBOX
To install the ComBox, carry out the following preparatory activities:
-ComBox cabling
-DTSU meter configuration
-Direct connection via MINI-USB cable
-Digital output

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2.1. COMBOX cabling
Make the following connections:
-5 VDC power supply (use included power supply unit or micro USB port)
-The COM (COM1-COM2 and DO ports) are located in the part highlighted in green
-The Ethernet connection of the ComBox does not require static IP

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2.2. DTSU meter configuration
NOTE: power IMPORTED from the grid must be NEGATIVE (check that Pa, Pb, Pc are negative with the
inverter off)
Install the DTSU meter at the system's exchange point, as shown in the following diagram.
Cabling instructions of the meter and current probes
Connect PINs 24/25 of the Meter to ports A1/B1 of the ComBox, as shown in the following table:

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DTSU meter configuration
To configure the Meter, enter the settings menu as shown below:
-Press SET, the word CODE will appear;
-Press SET again;
-Enter the number “701”;
-From the first screen where the number “600” appears, press the “→” key once to write the number “601”.
-Press “SET” twice to move the cursor left, highlighting “601”;
-Press the “→” key once more to write the number “701”
-In case of an error, press “ESC” and then “SET” again to reset the required code.
-Confirm by pressing SET until you enter the settings menu.
-Enter into the following menus and set the parameters indicated:
1. CT:
a. Press SET to enter the menu
b. Write “40”
c. From the first screen where the number “1” appears, press the ”→” key several times until
the number “10” is written.
Signal +
(blue)
Signal -
(white-blue)
ComBox connector
A1
B1
Meter
24
25

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d. Press SET once to move the cursor left, highlighting “10”
e. Press the “→” key several times until the number “40” is written
f. Press “ESC” to confirm and “→” to scroll to the next setting.
Note:
-In case of error, press “SET” until the thousand digit is highlighted and
then press “→” until only the number “1” is displayed; at this point,
repeat the above procedure.
-The transformation ratio “40” is indicated when using the
standard probes supplied with the meter. If probes other than those
supplied are used, this value must be set correctly.
2. ADDRESS:
a. Press SET to enter the menu
b. Set Address “01” for Meter on exchange
c. d. Press “ESC” to confirm.
2.3. Connection via LAN
To complete the configuration of the ComBox, the devices (Inverter/meters) must be entered in the web
configuration page.

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The ComBox with factory settings in DHCP mode and the IP address will be assigned automatically by the
gateway of the host network. Check that the router is in DHCP mode.
The ComBox configuration page can be accessed via a browser by typing its IP address into the address bar
and pressing ENTER. (The credentials for standard access are user: admin and password: password)
2.4. Direct connection via MINI-USB cable
As an alternative to what is specified in section 2.3, a PC can be connected directly to the ComBox using the
MINI-USB cable supplied with this guide.
If it is difficult to find the IP address of the ComBox due to network restrictions, simply run the “ncpa.cpl”
application from the “run” window. This will open the “network connections” window:

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Disconnect the PC from all active connections (Ethernet/Wi-Fi), then connect the ComBox to the PC via the
mini-USB (wait approx. 5 minutes after switching on the ComBox to allow the device to boot up completely)
using the cable supplied. A new connection will appear:
Right-click on the connection and select “properties,” the following window will open:

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Select Internet Protocol Version 4 (TVP/IPv4) and click on “properties.” Customise the connection as follows:
It is now possible to access the ComBox configuration page via a browser at the address 192.168.7.2.

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Go to the configuration WebServer by entering the IP address of the ComBox into a browser. Enter User:
admin; password: password. Click "login" to enter
After entering the credentials, the Firmware version and serial number of the ComBox will be displayed at the
bottom left of the screen.
2.5. Digital output
The ComBox device is equipped with a dry contact (NO/NC) for piloting external systems to disconnect the
system from the AC mains (e.g. relay or contactor).

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This contact (which is found in the “COM” part of the ComBox) will change status if communication with the
inverters fails or the regulation is not working properly.
3. Installation and configuration
Depending on the specific characteristics of the system, one of the following installation schemes/logics can
be chosen. After installation, it will be necessary to configure the ComBox connecting to it via a PC:
-COMBOX and PV system via Ethernet dongle (ZSM-ETH-USB / ZSM-ETH-EXT)
-COMBOX and PV system via RS485 interface
-COMBOX and PV+HYD system via Ethernet dongle (ZSM-ETH-USB / ZSM-ETH-EXT)
-COMBOX system and PV+HYD system via RS485 interface
-COMBOX and ZSM-METER-DTSU via RS485 interface
-Activation of the Zero Feed-In function
Installation can be carried out using the ETH dongles (ZSM-ETH-USB, one per inverter) or using the RS485
port of the Inverter.
Before configuring the ComBox, check that the inverters are up to date with the latest Firmware available on
the ZCS website. If they are not, proceed with the update by following the procedure outlined on the product's
website page. Before installing the product, it is recommended to always update the FW and safety standards.
In addition to being able to control the power produced by the inverters, the ComBox module can also monitor
the system's consumption (in combination with the ZSM-METER-DTSU meter).
3.1. COMBOX and PV system with Ethernet dongle (ZSM-ETH-USB / ZSM-
ETH-EXT)
Materials required for installation:
-Compatible ZCS inverter (section 1.1 of this guide)
-ETH Dongle (ZSM-ETH-USB), one for each inverter in the system
-DTSU meter (ZSM-METER-DTSU)

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-ComBox
-Two terminating resistors 120 Ohm (not supplied with the ComBox)
System diagram:
NOTE:
-Inverters must be configured with static IP (contact the administrator of the network hosting the
system for details)
-Check that router ports 80 and 8899 are open within the Local Area Network (LAN).
-Insert 2 terminating resistors of 120Ω on pins 24-25 of the meter and on COM1 of the ComBox if the cable
length exceeds 20 meters.
Once the hardware has been configured, proceed with configuring the software of the device as follows (for
connection details, see section 2.3/2.4):

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Go to the configuration WebServer by entering the IP address of the ComBox into a browser. Enter User:
admin; password: password. Press "login" to enter
Press "Add Device" to add a new device

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Enter the name of the Inverter (to eliminate any ambiguity, we recommend that you also enter the inverter's
SN), enable the power control and enter the rated power of the Inverter (in KW). Press "Next" to continue.
Select the communication protocol "modbustcp" and press "Next" to continue

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Enter address "01" and press "Next" to continue.
NB: keep address “01” for all inverters to be entered.
Press “+” to create a new bus
Enter the name of the Inverter (to eliminate any ambiguity, we recommend that you also enter the SN of the
Inverter), connection type "TCP." Enter the static IP address previously assigned to the inverter, port
"8899." Press "Accept" to continue and then confirm with "OK."

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Press Next.
Select "Azzurro" as the brand and the correct inverter model. Press “Next” to continue.

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Press “Create” to confirm the data entered, and then "OK."
Enter the other inverters following the same procedure (ATTENTION: create a bus for each inverter in the
system, entering the static IP address previously set for each inverter in each bus)
Press "Apply Changes."
Following Apply Changes the connection status of the inverter should change to green.