The FlexOM Gateway V2 is an IoT cloud-based gateway that allows the integration of
various hardware and system scenarios
Connect multiple CPS inverters and other devices to a single RS485 daisy chain
RS485 pass-thru allows third-party controller to act as a client in parallel with the FlexOM
Gateway V2
Enables diagnosis of RS485 wiring issues through the CPS FlexOM portal
Modbus TCP pass-thru (Third-party controllers can read/write commands to CPS inverters
through Modbus TCP.)
Easy mass deployment and configuration via the CPS Connect Pro app using built-in BLE
Reduces the need for truck rolls via remote firmware updates
Page 2
Page 4
Product Specifications
RS485 Interface
No. of Ports
Protocol
Modbus RTU Mode
Terminator for RS485
Isolation
AUX Interface
No. of Ports
Protocol
Modbus RTU Mode
1 (A: 6-Pin Connector or B: 5-Pole Terminal Block)
Modbus RTU
Client
120 ohms
2.5 kV
1 (3-pole Terminal Block)
Modbus RTU
Server (RS485 Pass-thru)
Terminator for RS485
Isolation
Ethernet Interface
10/100BaseTX Ports (RJ45 connector)
Connect to the Cloud Applications
SCADA controllers on the same LAN subnet
120 ohms
2.5 kV
1
MQTT
Modbus TCP
Page 3
Page 5
Modbus TCP
Mode
Max. No. of Client Connections
Cellular Interface (FlexOM-4G V2 product only)
Cellular Standards
No. of SIM Slot
Cellular Antenna Connectors
Bluetooth Interface
Standard
Antenna
Server
2
LTE-FDD/LTE-TDD, WCDMA
1
1 SMA female
BLE 4.2
Built-in
Power Parameters
Input Voltage
Power Consumption
Power Connector
Environmental Limits
Operating Temperature
Storage Temperature
Ambient Relative Humidity
9 to 24 Vdc
2.5 W, Max. 5 W
Terminal Block
-30°C to 85°C (-22 to 185°F), Natural convection
-40 to 85°C (-40 to 185°F)
5 to 85% (non-condensing)
Page 4
Page 6
Physical Characteristics
Housing
IP Rating
Dimensions
Weight
Standards and Certifications (DoC)
CE-EMC
Plastic
IP 20
70 mm / 100 mm / 28 mm (2.76 in x 3.94 in x 1.10 in)
73g ( 0.16 lb )
EN 55032
EN 55035
EN 61000-3-2
EN 61000-3-3
CE-RED
CE-LVD
FCC SDoC
FCC ID
EN 301 908
EN 300 328
EN 301 489-1 / -17 / -52
EN 62368-1
EN 62368-1
Part 15B
Part 15C
Page 5
Page 7
Dimensions and Interfaces
0.83 in
(21 mm)
Dimensions without DIN rail housing
1.26 in
(32 mm)
3.98 in
(101 mm)
2.72 in
(69 mm)
4.06 in
(103 mm)
Dimensions with DIN rail housing
Page 6
3.03 in
(77 mm)
Page 8
Dimensions and Interfaces
B
Vin GND A+ B- G
5-PIN Port B:
External DAS box installation
(see installation options 2a and 2b)
Caution:
If the length of either the cable connecting to the RS485 port or the AUX port
of the gateway is over 1000 meters, the switch for the 120 ohm terminating
resistor corresponding to the port must be set to ON.
Default
ON
1
Terminating Resistance Switch
Power Switch
A
Caution:
Before configuring the gateway,
ensure the power switch is set to ON.
POWER ON
Module Socket
6-PIN Port A:
Internal wire-box installation
(see installation option 1)
Ethernet Port
Terminating Resistance Switch
AUX Port
A+ B- G
Page 7
Page 9
Dimensions and Interfaces
SIM Card Slot
Internet Interface:
4G wireless
(FlexOM-4G V2 only)
Connector for 4G antenna
Internet Interface:
Ethernet
Note:
Confirm the gateway model by checking the model number and SN listed on the label on top of the
gateway card.
The FlexOM Gateway V2 cards must have an Internet connection to enable remote data
communications via the CPS Portal.
The standard FlexOM Gateway V2 requires an Internet connection via the Ethernet port.
The FlexOM-4G Gateway V2 includes a pre-installed SIM card and 5-year 4G cellular plan.
The FlexOM-4G Gateway V2 may not use, be configued with, or be activated with a third-party
SIM card.
Page 8
Page 10
Dimensions and Interfaces
Internet Interface: Ethernet (FlexOM Gateway V2)
The FlexOM Gateway V2 requires a connection to the Internet using Ethernet. Any LAN
firewall ports must be opened before commissioning the FlexOM Gateway V2.
The following ports must be opened both ways (for incoming and outgoing
communications):
TCP 1884 with destination IP 47.254.52.209
(mqtt.chintpowersystems.com)
Internet Interface: 4G (FlexOM-4G Gateway V2 only)
The FlexOM-4G Gateway V2 includes a pre-installed SIM card and is compatible with
AT&T, T-mobile, and Verizon networks. The standard 4G cellular data plan period is 5
years.
Once the FlexOM-4G Gateway V2 is powered on and the 4G antenna has been installed
(see page 26), it will automatically select and connect to the provider network with the
strongest or most stable signal.
Page 9
Page 11
LED Indicators
APP Connect
Indicates whether the CPS Connect Pro app is connected to the gateway and
whether the device is being configured
Light Off
Blink
Light On
BLE Hardware Error
No Active Connection
Phone Connected
RS485 Device
Indicates whether the RS485 devices are connected to the gateway and whether
there is a RW command to the daisy chain being executed
Light Off
Found Nothing
Light OnSome Devices Found
IP ACK
Indicates whether the gateway acknowledges and is connected to the CPS portal or
target server via the Internet protocol (IP)
Light Off
Blink
Light On
Unable to connect to LAN router or 4G base station
Connected to a LAN router or 4G base station,
but not yet connected to the target server
Connected to the target server
Page 10
Page 12
Typical System Design and Diagrams
The following diagrams in Figure 1: RS485 Pass-Through, Figure 2: Modbus/TCP
Pass-Through, and Figure 3: Multiple Devices Using One RS485 show the various options
for connecting and managing data transmission from the RTU devices (inverters, weather
instruments, etc.) to the CPS portal or an optional third-party data logger or SCADA.
The FlexOM Gateway V2 can be connected to a third-party datalogger/controller by
connecting RS485 cable to the AUX port to enable the equivalent of a direct transmission
connection with the daisy chain.
Inverters
RS485 Cable
B
5-PIN Port B:
External DAS Box
Installation
Model AModel A
A
6-PIN Port A:
Internal Wire-Box
Installation
RS485 Cable
Model A
Daisy Chain (up to 32 devices)
CPS
Portal
3rd Party Data Logger
/ SCADA
3rd Party
Portal
Figure 1: System Diagram for RS485 Pass-Through
Page 11
Page 13
Typical System Design and Diagrams
Modbus/TCP Pass-through
The FlexOM Gateway V2 can be used as a Modbus/TCP server when connected to a
third-party SCADA system, and will forward various commands to the daisy chain.
Inverters
RS485 Cable
B
5-PIN Port B:
External DAS Box
Installation
Model AModel A
A
6-PIN Port A:
Internal Wire-Box
Installation
Model A
Daisy Chain (up to 32 devices)
CPS
Portal
Ethernet Cable
3rd Party Data Logger
/ SCADA
3rd Party
Portal
Figure 2: System Diagram for Modbus/TCP Pass-through
Page 12
Page 14
Typical System Design and Diagrams
Connecting Multiple CPS Inverters and Other Devices Using One RS485
The FlexOM Gateway V2 allows users to connect different CPS inverter models and
third-party weather sensors (supplied by others) in the same daisy chain via RS485.
The default baud rate for theFlexOM Gateway V2 is 9600 baud. This setting can be changed
manually. Ensure all devices in the RS485 daisy chain are set to the same baud rate.
Please check with CPS America regarding hardware compatibility prior to installation and
commissioning. CPS Hotline (choose option #2): +1 855-584-7168
RS485 Cable
B
5-PIN Port B:
External DAS Box
Installation
Inverters
Model AModel B
A
MeterWeather
Sensor
Daisy Chain (up to 32 devices)
6-PIN Port A:
Internal Wire-Box
Installation
RS485 Cable
3rd Party Data Logger
/ SCADA
Figure 3: System Diagram for Multiple Devices Using One RS485
Page 13
CPS
Portal
Page 15
Safety Precautions
NOTICE
Before performing operations, read through this manual and follow all the precautions
included to prevent accidents. The safety precautions provided in this document do not
cover all possible safety precautions. CPS shall not be liable for any consequence caused by
the violation of the safety operation regulations and design, production, and usage
standards.
Declaration
CPS shall not be liable for any consequence caused by any of the following events:
Transportation
The storage conditions do not meet the requirements specified in this document.
Violation of the operation instructions and safety precautions in this document for
installation, cable connecting, and maintenance.
Operation in extreme environments which are not covered in this document.
Unauthorized modifications to the product or software code.
Installation or use in environments which are not specified in related international
standards.
Changes or modifications not expressly approved by the party responsible for
compliance could void the user's authority to operate the equipment.
Personnel Requirements
Only qualified electrical technicians are allowed to install and operate the FlexOM
Gateway V2.
Operation personnel should receive professional training.
Operation personnel should read through this document and follow all the
precautions.
Operation personnel should be familiar with the safety specifications about the
electrical system.
Operation personnel should understand the composition and working principles of
the grid-tied PV power system and local regulations.
Page 14
Page 16
Safety Precautions
Installation
Ensure that the FlexOM Gateway V2 is not connected to a power supply and is not
powered on before starting installation.
Ensure that all electrical connections comply with local electrical standards.
DANGER
High voltage may cause electric shock and serious injuries during FlexOM Gateway V2
operation.
Do not touch components such as AC cables, circuit breakers and connectors while the
FlexOM Gateway V2 is energized.
Maintain the FlexOM Gateway V2 with sufficient knowledge of this document and
proper tools and testing equipment.
Before performing maintenance tasks, power off the FlexOM Gateway V2 and
perform lockout/tagout (LOTO) of the source circuit.
For personal safety, wear personal protective equipment (PPE), including insulated
gloves and eye protection.
Page 15
Page 17
Hardware Installation
The FlexOM Gateway V2 card can be installed one of two ways:
Option 1: Attached internally to the existing communications board within the inverter wire-box
Option 2: Mounted via DIN rail to an external DAS box
In addition, a 4G cellular antenna must be installed in the FlexOM-4G Gateway V2 model,
regardless of which installation option is selected from the list above.
The FlexOM Gateway V2 card can be installed inside the inverter wire-box with no
external power source required. The card can be mounted within the wire-box for all CPS
inverters excluding the 250/275 kW and the legacy 36 kW inverter models.
Ensure that the inverter AC and DC switches are in
the OFF position before installing the FlexOM
Gateway V2 inside the inverter wire-box.
CPS Portal
Primary MQTT
InverterInverter
RS485
When the inverters are monitored via the FlexOM Gateway V2, a unique RS485 address for
each inverter must be assigned using the HMI (LCD or CPS Connect Pro app). Refer to the
specific CPS inverter User Manual for instructions on setting and assigning the RS485
Modbus address.
Inverter
Router
Wire-Box
+ CPS Connect Pro App
The FlexOM Gateway V2 can support a maximum of up to 32 inverters or devices
connected to the daisy chain network.
inverter communication board in the
wire-box using a #1 Phillips bit.
Replace the screws with the standoffs included in the accessories kit.
Repeat this process for each of the
(3) screws and standoffs while
keeping the communication board in
place.
Inverter RS485 Port
Torque standoffs to 7 in-lbs using a
2
3/16” socket hex driver.
6-PIN Port A:
Internal Wire-Box
A
Installation
3
After all standoffs have been inserted,
install the FlexOM Gateway V2 by
carefully aligning the 6-PIN Port A with
the 6-PIN header in the upper left-hand
corner of the communication board.
Install the (3) screws removed in step 1
into the standoffs to secure the
FlexOM Gateway V2 in place and
torque to 7 in-lbs using a #1 Phillips bit.
Connect the RS485 inverter daisy chain to the inverter communication board using pins
A+, B-, and G in the Connector provided in the inverter accessories kit when mounting
inside the inverter wire-box. Check the inverter User Manual for RS485 installation
instructions.
FlexOM Gateway V2 uses a two-wire Modbus RS485 multipoint serial line system.
Shielded, twisted pair, 22 AWG, stranded cable such as Belden 3106A is recommended for
the daisy chain.
Once pins A+, B-, and G in the Connector are connected, then insert the Connector into the
terminal block in the port on the bottom of the inverter communication board (behind the
FlexOM Gateway V2 as shown below).
If applicable, connect the 3rd Party Datalogger
to the AUX port in the bottom left-hand corner
of the FlexOM Gateway V2 using the 3-PIN
A+ B- G
RS485 3rd Party Data Logger
(connected to FlexOM
Gateway V2 card)
Use the Connector supplied in the inverter accessories
Connector provided in the accessories kit.
FlexOM
Gateway V2
Card
Inverter
Communication
Board
A+ B- G
RS485 Inverter Daisy Chain
(connected to inverter
communication board)
kit to connect to the RS485 daisy chain via the inverter
communication board. This may be a 5-PIN, 6-PIN, or
NOTE: If connecting to the Internet via Ethernet, follow step 5 below. If connecting via
4G, skip to steps 1-3 on page 26 and return to this page to complete hardware
installation by following step 6 below.
5
To connect to the Internet via Ethernet, insert the RJ45 LAN cable into the Ethernet port
of the FlexOM Gateway V2.
The LAN connection must be able to access the Internet without port
filtering behind the firewall (see note on page 9 regarding LAN firewall ports).
POWER ON
Power Switch
Ethernet Port
Turn the DC switch on the inverter into the ON position to power the inverter and
6
the FlexOM Gateway V2.
Ensure the Gateway Power Switch is set to ON and an LED indicator is ON before
7
closing the inverter wire-box enclosure.
Page 20
Page 22
Hardware Installation
Option 2a: DIN Rail Side Mounting (in External DAS Box)
The FlexOM Gateway V2 card can also be installed inside an external DAS box and mounted
with a DIN rail clip. Installation options 2a (side mounting) and 2b (flat mounting) on the
following pages describe these steps.
#1 Phillips Screw Driver
(4” shank length)
M4 Flat Head Screw
DIN rail Clip
2
Install the FlexOM Gateway V2 onto the base of the housing and tighten it at the
positions shown in the figure with the standoffs provided in the accessories kit.
Cover
1
As shown in the figure, use a
screwdriver to insert and secure
the DIN rail clip and the upper
cover of the housing together with
M4 flat head screws.
Torque to 7 in-lbs using 3/16” socket hex driver.
Base
Page 21
Page 23
Hardware Installation
Option 2a: DIN Rail Side Mounting (in External DAS Box)
3
Align and close the upper and lower
housings according to the positions of
the screw holes, and use a #1 Phillips
screwdriver to fasten the two parts
together with M3 screws.
To ground the FlexOM Gateway V2 once
4
5
installed in the DIN rail enclosure, clamp
the ground wire into the screw at the
position shown in the figure.
Mount the housing within the DAS box using the DIN rail clip.
Page 22
Page 24
Hardware Installation
Option 2a: DIN Rail Side Mounting (in External DAS Box)
Connect the RS485 inverter daisy chain to the FlexOM Gateway V2 card using pins
6
A+, B-, and G in the 5-PIN Connector provided in the accessories kit.
FlexOM Gateway V2 uses a two-wire Modbus RS485 multipoint serial line system.
Shielded, twisted pair, 22 AWG, stranded cable such as Belden 3106A is
recommended for the daisy chain.
Connect DC power to the FlexOM Gateway V2 card using pins Vin and GND in the
5-PIN Connector provided in the accessories kit, then insert the Connector into the
5-PIN Port B as shown below.
5-PIN Port B:
External DAS Box
B
Installation
POWER ON
Vin GND A+ B- G
RS485 Inverter Daisy Chain
NOTE: If connecting to the Internet via Ethernet, follow step 7 below. If connecting via
4G, skip to steps 1-3 on page 26 and return to this page to complete hardware
installation by following step 8 below.
Power Switch
Ethernet Port
To connect to the Internet via Ethernet, insert the RJ45 LAN cable into the Ethernet port
7
of the FlexOM Gateway V2.
The LAN connection must be able to access the Internet without port
filtering behind the firewall (see note on page 9 regarding LAN firewall ports).
Ensure the Gateway Power Switch is set to ON and an LED light is ON and visible before
8
closing the DAS box enclosure.
Page 23
Page 25
Hardware Installation
Option 2b: DIN Rail Flat Mounting (in External DAS Box)
1
Put the parts in position in the order of a, b, c, and tighten the corresponding
screws and standoffs.
Torque to 7 in-lbs using 3/16” socket hex driver.
a
DIN Rail Clip
b
c
M4 Flat Head Screw
12mm Standoffs
2
To ground the FlexOM Gateway V2 once
installed in the DIN rail enclosure, clamp
the ground wire into the screw at the
position shown in the figure.
3
Mount the housing within the DAS box using the DIN rail clip.
Page 24
Page 26
Hardware Installation
Option 2b: DIN Rail Flat Mounting (in External DAS Box)
Connect the RS485 inverter daisy chain to the FlexOM Gateway V2 card using pins
4
A+, B-, and G in the 5-PIN Connector provided in the accessories kit.
FlexOM Gateway V2 uses a two-wire Modbus RS485 multipoint serial line system.
Shielded, twisted pair, 22 AWG, stranded cable such as Belden 3106A is
recommended for the daisy chain.
Connect DC power to the FlexOM Gateway V2 card using pins Vin and GND in the
5-PIN Connector provided in the accessories kit, then insert the Connector into the
5-PIN Port B as shown below.
5-PIN Port B:
External DAS Box
B
Installation
POWER ON
Power Switch
Vin GND A+ B- G
RS485 Inverter Daisy Chain
NOTE: If connecting to the Internet via Ethernet, follow step 5 below. If connecting via
4G, skip to steps 1-3 on page 26 and return to this page to complete hardware
installation by following step 6 below.
Ethernet Port
5
To connect to the Internet via Ethernet, insert the RJ45 LAN cable into the Ethernet port
of the FlexOM Gateway V2.
The LAN connection must be able to access the Internet without port filtering behind
the firewall (see note on page 9 regarding LAN firewall ports).
Ensure the Gateway Power Switch is set to ON and an LED light is ON and visible before
Screw one end of the antenna
cable into the cable connector
of the gateway (applicable to
FlexOM-4G model only).
Pass the SMA end of the
coaxial antenna cable through
the disassembled cable gland
Before closing the cover of
inverter wire-box or external
DAS box, check again that the
gateway’s power switch is set
to ON.
POWER ON
3
2e
2d
parts in sequence, then tighten
the cable glands again.
Mount the 4G antenna as high
as possible on a metallic
structure.
2c
2b
2a
FlexOM-4G Gateway V2 Accessory Kit includes
(in addition to standard accessories):
-- (1) IP65 4G cellular antenna
-- (1) Antenna coaxial cable (3m)
-- (1) Cable gland
-- (1) Antenna mounting bracket
-- (1) Pre-installed SIM chip
1
Screw the N-Type end of the coaxial antenna cable
into the antenna.
Page 26
Page 28
Daisy Chain Wiring
(All FlexOM V2 Models and Configurations)
FlexOM Gateway V2 uses a two-wire Modbus RS485 multipoint serial line system. Shielded,
twisted pair, 22 AWG, stranded cable such as Belden 3106A is recommended for the daisy
chain.
Ensure that all devices in the daisy chain are properly connected according to each device’s
5-PIN or 3-PIN terminal block as shown in the diagram below.
Note that the daisy chain must be connected to the terminal block in the inverter
communication board for internal wire-box installation (see installation option 1) or to the
5-PIN terminal block in the FlexOM Gateway V2 for external DAS box installation (see
installation options 2a and 2b).
Vin GND A+ B- G
RS485 Cable
5-Pole RS485 Port B
Terminal Block on gateway
or on the inverter’s
communications board
A+ B- G
Inverters
Model AModel B
Daisy Chain
3-Pole AUX port
Terminal Block
on gateway or on
the inverter’s
communications
board
Meter
RS485 Cable
Weather
Sensor
Page 27
3rd Party Data Logger
/ SCADA
Page 29
Using the CPS Connect Pro App
Scan the QR code with a mobile phone to complete the CPS
Connect Pro app download and installation.
Or search for “CPS Connect Pro” in the Apple Store (iOS) or
the Google Play Store (Android).
The screenshots shown in the following pages are from the iPhone
version of the CPS Connect Pro app. The Android user interface may look
slightly different but the setup procedure will be the same as shown.
Page 28
Page 30
Check the Internet Connection
NOTE: No WiFi dongle is required to interface or activate the FlexOM Gateway V2.
The Gateway will connect to the Internet via Ethernet or 4G, and the Gateway will
connect to the CPS Connect Pro app via Bluetooth.
Make sure your phone can
connect to the Internet when
you run the app for the first
time. The CPS Connect Pro app
needs to sync important data
from the cloud.
Click "smart link" and the app
will prompt you to obtain some
phone permissions. If there is
no abnormal prompt, click "next"
in the upper-right corner to
proceed.
Page 29
Page 31
During the process of connecting and entering the gateway
configuration interface, the CPS
Connect Pro app will prompt
detailed information in case of
SN barcode
The BLE name includes the SN
The gateway SN is included in the
BLE signal name, and the app will
list the scanned signals. Select the
SN consistent with the target
gateway label and click to enter.
any abnormality. This feature
makes it easy for users to
diagnose problems.
Page 30
Page 32
Connecting the gateway to
the Internet is the most
important step.
During the activation
process, once the gateway
is powered on it will
attempt to connect to the
Internet via 4G by default.
If this attempt fails, it will
automatically attempt to
connect via Ethernet.
The gateway may also be manually configured to connect via Ethernet. To switch from a 4G to an Ethernet connection, click on "Internet Settings" and
select "Ethernet.”
Enter the correct
Ethernet IP information and
click “Save” in the upper
right corner.
If the Status is displayed as
“Online” the gateway is
connected to the target
server.
When the gateway status
becomes “Online” the
gateway will automatically
create related objects on
the portal, and the
administrator can remotely
set the required
parameters.
Page 31
Page 33
Modbus Device Settings
The gateway is
configured with a default
modbus ID range.
Click "Scan Daisy Chain"
and the gateway will
scan the daisy chain.
After scanning, a device
list will appear with the
default ID.
The user can either rescan the target IDs individually in the list, or
scan the daisy chain in
full.
By clicking “Modbus ID
Range” the user can
manually edit the
modbus ID range.
The existing modbus ID
must be deleted by
clicking the minus-sign
button before a new ID
can be assigned.
A unique Modbus ID
must be assigned to
each inverter.
Once all Modbus
devices have been found
and identified, click
“Save” in the upper right
corner.
Page 32
Page 34
Completing Installation
After configuring Modbus settings, the site name,
gateway name, country, and time zone may all be
specified within the CPS Connect Pro app.
To finalize all settings and complete installation,
click “Next.” A new window with the message
“Installation Success” will appear.
Once the FlexOM Gateway V2 or FlexOM-4G Gate-
way V2 is installed and activated, it is recommended
to contact the CPS Hotline to request confirmation
that the gateway and attached RTU devices are
populated in the CPS Monitoring Portal.
CPS Hotline (choose option #2): +1 855-584-7168
Reset / Restart
To restart or reset the FlexOM Gateway V2 and clear
all current setting parameters, select “More..” from
the main menu. The Settings menu shown on the
left will appear.
Clicking "Reset" will clear all the current FlexOM
Gateway V2 setting parameters and restore the
factory settings.
Clicking "Reboot", will automatically power off and
restart the FlexOM Gateway V2 without changing
the current setting parameters.
Page 33
Page 35
CPS Warranty Policy
The warranty policy of this product is specified in the contract; otherwise, the standard warranty is
2 years.
For service, Chint Power Systems America will provide local support.
For warranty terms, please refer to the CPS America accessories warranty policy in place at time of
purchase.
If your product requires troubleshooting or warranty service, contact your installer or dealer. If you
are unable to contact your installer or dealer, or the installer or dealer is unable to provide service,
contact the CPS America hotline: +1 855-584-7168
Page 34
Page 36
Page 35
Service Hotline: 855-584-7168
CHINT POWER SYSTEMS AMERICA CO., LTD.
Email: AmericaSales@chintpower.com
Website: www.chintpowersystems.com
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