WECO 5K3-XP-EMEA
40
2.5.4 Low Voltage Single Stack Power and Data Connections (15-Modules Maximum)
Proceed with the physical installation of the desired quantity and configuration of the Battery Modules,
following the installation sequences and guidelines as described in Section 1 and Section 2 of this
manual.
Connect the power cables as indicated below, making sure that the batteries are OFF
(check the button
LED on the bottom) and always measure the terminals with a multimeter to check for
ZERO VOLTS.
As per UL regulation, a circuit breaker is compulsory to separate the battery circuit from the inverter.
Information:
When multiple Battery Modules are connected, it
is possible to choose between ‘’capacity’’
chain series or parallel to increase capacity and peak. In case of parallel, the parallel battery and inverter can only
communicate through CAN interface, and the communication between the batteries will be through RS485.
Attention:
Be sure to follow the above method of “
Daisy C
haining” the RS485 connections, starting at Port
-B
on the upper Battery Module, then into Port-A on the next module and out of Port-B, then into Port-B on the next
module, and so on.
``
Caution
:
B+
interface is always positive,
B-
interface is always negative; GND is for the parallel battery grounding Port.
Caution
: For Pass-through connections with bus bar the max Charge/Discharge current must be limited to 300Adc
Above 300A it is necessary to connect each module individually to a common bus bar
Information:
Connect the cables according to the installation requirements, always paying attention to minimize the
length of the cables to avoid voltage drops.
Attention:
To ensure safety and stability of the cluster always connect the Battery Modules using the feet.
CAN-BMS to Inverter
OUTPUT Positive from the UPPER module
On the top module, connect RS485 series to Port-B. On the next
module, go in on Port-A and out on Port-B.
Continue to “Daisy Chain” in this way until the
bottom module.
RUN Button with LED Indicator
POWER SWITCH
RS232 Monitoring Port
BUS BAR for Stack Connections
DIP Switch Address
OUTPUT Negative from the LOWER
module
Circuit Breaker (refer to the local standards)
Close the Breaker before initiating the battery start up procedure