ABB UNO-DM-TL-PLUS-US Product Manual page 60

- Connect the DC wiring to DC input terminal blocks
are spring pressure type and accommodate a wire size range of 20-8 AWG.
Connect the strings in either independent or parallel mode, following the
appropriate set of instructions below:
DC connection with INDEPENDENT MPPT configuration
If two PV arrays with each be below the maximum input current rating of the
inverter, they may be connected as "IND" array, each with its own MPPT. In
this case, do nothing with the jumper wires which came with the inverters.
- Connect the positive side of the first PV array to +IN1, and its negative
side to -IN1.
- Connect the positive side of the second PV array to +IN2 and its negative
side to -IN2. Up to four strings can be connected in independent mode.
- During commissioning, confirm that the input mode is set to IND.
MPPT2
String2
MPPT1
String2
MPPT2
DC connection with INDEPENDENT MPPT configuration
If a PV array's output current is more than the rating for a single inverter
channel:
- Connect the red jumper wire between the +IN1 and +IN2 terminal block
inputs. Then connect the jumper wire black wire between the -IN1 and
-IN2 terminals. Remember later to set the input mode to PAR from the
display (Settings>Input Mode>Parallel).
- Connect the array to the IN1 (MPPT1) and IN2 (MPPT2) input positions,
running separate wires for positive (+) and negative (-) for each array.
MPPT2
MPPT1
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12
CAUTION
REFER TO LOCAL CODE
FOR WIRE SIZE
ATTENTION
FAIRE RÉFERENCE À LA
LÉGISLATION LOCALE POUR
LA DIMENSION DU CABLE
String1
MPPT1
String1
PARALLEL
CAUTION
JUMPERS
REFER TO LOCAL CODE
FOR WIRE SIZE
ATTENTION
FAIRE RÉFERENCE À LA
LÉGISLATION LOCALE POUR
LA DIMENSION DU CABLE
5 - Installation
. DC wiring terminals