10
Installation and Safety Manual
Trinasmart
2. INSTALL THE MANAGEMENT UNIT AND GATEWAY
2.1 Trinasmart Management Unit and Gateway Installation
Management Unit Installation
Ensure the AC and DC disconnect switches are in the OFF position for the inverter.
Mount the Management Unit (MMU) in a location that has
access to an AC power source, a stable network connection,
and proper cable connection to the Gateway. The MMU
should be mounted between 3 and 5 feet above the ground.
Mounting tabs are provided for installing on uni-strut or
directly to a wall surface.
The power cord for the MMU is provided with the system kit
and will be connected to the terminal within the Management
Unit enclosure.
For safety compliance, outdoor installations also require
weatherproof housing be used to enclose the AC power
adapter.
The Trinasmart Management Unit includes an external, weather-proof Ethernet port on the bottom surface. Connect
an ethernet cable (not provided) to a live port and then to the MMU. For outdoor installations, install a
weatherproof cap (provided as an option) to the ethernet port by threading the ethernet cable through the cap,
plugging in the ethernet cable, screwing on the cap to the port, and hand tightening.
NOTE:
If the array is going to be placed on a multi-roof surface, or contains more than 60 modules
total, then this system requires more than one Gateway. Please contact the Trina Solar Sales
Department or your distributor for information on ordering additional Gateways.
The MMU is connected to the Gateway using an RS-485 cable. The cable should be a four-conductor, twisted
pair, outdoor-rated wire of at least 18AWG. See Tigo Energy’s website for a list of tested cable options.
Access the MMU communications ports by pressing the latch at the bottom edge of the clear cover of the
MMU and opening the enclosure. Remove the lower cover panel by unfastening the two screws in the bottom
corners with a Phillips head screwdriver.
To install the RS-485 cable, completely remove the nut from the cable gland. Feed the cable through the nut,
and the cable gland into the MMU housing. Attach the four wires to the cable connector terminal, which can be
removed from the circuit board for easier handling. Re-engage the connector into the RS-485 port on the right side. Take
special care NOT to insert this in the Auxiliary RS-485 port. Note the wire colors used on the MMU connection so you can
connect the other end of the wire to the Gateway with the same color configuration. Replace the nut on the cable gland
and hand tighten. If four-conductor twisted pair cable is not available, then outdoor-rated Cat 5 Ethernet cable can be
used instead. See Appendix B for instructions on installing Cat 5 cable.
Replace the lower cover panel, and securely fasten the two screws in the bottom corners with a Phillips head screwdriver.
Close and latch the protective cover in the MMU.
Gateway Installation
A Gateway is provided with the system kit to create the communications link to the Trinasmart Optimizers. Install the
Gateway onto the module frame in the top left corner by pushing the compression clips on the bracket onto the module
metal frame and tightening the set-screw at a torque rating of 15-20 in lbs. to ensure bonding. The face of the Gateway
(including the removable face and the label) should be facing out of the module frame. Confirm that the connectors are
