CARLO GAVAZZI ISMG 315, User Manual

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2.3.3 Connection of the Communication cable
The ISMG3 inverter supports two common data interface standards, RS-232 and
RS-485 that will be used to communicate to a remote computer or terminal
equipped with RS-232 or RS-485. Only one of the communication interfaces can
work at a time. As shown in Figure 2.3.3.1, there are two RJ-45 connectors, RJ45-R
and RJ45-L, which are located on the bottom of the enclosure. The pin numbers of
the RJ-45 connectors and the corresponding signals are described in Figure 2.3.3.2
below. If the RS485 is used as the external communication interface and the
inverter is the last device within the RS485 chain connections, then the
termination switch shall be put to ON position (shown in Figure 2.3.3.4). Users
shall open the front lid of the wiring box to switch the termination switch to ON
position. The termination switch is default set to OFF position.
Fig 2.3.3.1 Positions of the communication ports and termination switch