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Installation and Safety Manual
Trinasmart
NOTE:
The Gateway should NOT be located where it may encounter direct exposure to sunlight or rain-fall, or be
placed where the unit could be sitting in pooled water for long periods of time.
Position the Gateway at the center of the module cluster and attach to the upper left-hand corner of a PV
module frame.
2.3 Multiple Gateways
In larger (over 120 modules) or multi-surface PV projects, more than on Gateway will be required to support proper
communications between the Optimizers and the MMU.
To plan the number of Gateways required for the design, partition the system into clustered blocks (up to 120 modules) or
separate sub-arrays. The Module Optimizers in any block should not be more than 50 feet from the Gateway.
Place a Gateway in the physical center of each block or sub-array and connect the Gateways in series, using the second
four-pin connector as the outbound cable from one Gateway to the next. Repeat this process until the final Gateway is
installed.
Keep in mind that only the final Gateway in the series connection should have a termination resistor.
2.4 Power on the Management Unit
IF A SENSOR BOX HAS BEEN ORDERED WITH THE SYSTEM DO NOT PROCEED BEFORE READING SECTION 2.5 SENSOR
INSTALLATION
Plug the MMU power cord into an AC outlet and ensure the MMU has access to the internet. Connect the MMU to the
site’s main AC power circuit (do not use a separate or dedicated power supply).
DO NOT INITIATE “DISCOVERY AND POWER ON” UNTIL ALL OPTIMIZERS HAVE BEEN INSTALLED.
NOTE:
To verify if a connection has been made to the network, the installer can perform a network test directly
from the MMU (see networking troubleshooting in appendix C). If a laptop is available, select the ‘Status’
page to see when the MMU was last updated. If the ‘Last Updated’ section appears in red, then the MMU
has NOT established connection to a viable network.
Once the MMU establishes connection to a network, the MMU will power up, perform configuration checks, download
the latest system software if updates are available, and download the configuration data.
2.5 Sensor Installation (Optional)
If additional sensors are required for the project for measuring light intensity, back-panel temperature, string current or
voltage, these accessories may be ordered with the Trinasmart System at the time of purchase. The sensor accessories are
powered RS-485 devices and are connected through the same RS-485 cable that connects the Gateway.
Install pyranometer, thermocouple(s) or current/voltage sensors within the array as desired. Place the Sensor Box in close
proximity to the sensor(s) within the array. The Sensor Box is provided with a module frame mounting bracket if frame
mounting is desired and appropriate.
The sensor boxes are connected in series, identical to that of a multi-gateway system (see “Multi-Gateway Systems” for
information on how to connect sensor boxes to the RS-485 chain). Be sure to install them before the final (terminated)
Gateway in the circuit.
