CPS SC Series - Communication Connection

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(4) When the output of the inverter is connected to the grid, an AC circuit
breaker is required to be installed to safely disconnect the inverter from the
grid when overcurrent happens.
Either a 3 pole or a 4 pole AC circuit breaker can be used. The maximum
breaker size allowed is 50A and 40A respectively for 14kW and 20kW inverter.
A smaller breaker may also be used, keeping in mind that a smaller breaker
may result in nuisance trips that may need servicing.
Table 3-8 Specification of AC breaker selection
Inverter
AC breaker rated current（A）
CPS SCA14KTL-DO/US-208
50
CPS SC20KTL-DO/US-480
40
3.3.3 Communication connection
There are two RS485 signal ports on the inverter. Shielded cables should
be used for communication cables with the maximum length of 3280 feet.
(1) The communication of one single local inverter is to connect the
RS485 communication bus cable through the RS485-1 or RS485-2 port of the
inverter directly. Wiring requirement of RS485-1/2 is shown in Table 3-9:
Table 3-9 RS485-1/2 wiring requirement
No.
Color
Function
1
White orange
485+
2
Orange
N.C.
3
White green
485-
4
Blue
N.C.
5
White blue
N.C.
6
Green
N.C.