CARLO GAVAZZI ISMG 315, User Manual

Page: 43 / 91

33
1 8
RJ45-L
Top view
Pin
1
TXD (RS232)
2 RXD (RS232)
3 Not used
4 GND
5 GND
6 Not used
7 TX A (RS485)
8 RX B (RS485)
1 8
RJ45-R
Top view
Pin
1
Factory reserved
2 Factory reserved
3 5V
4 GND
5 GND
6 5V
7 TX A (RS485)
8 RX B (RS485)
Fig 2.3.3.2 RJ-45 Pins and Signals
As shown in Fig 2.3.3.2, the RS-232 signal pins, TXD and RXD, are only on the
RJ45-L. Therefore, only the RJ45-L can be used to connect to the remote PC or
terminal when the RS-232 interface is selected. The cable with the part number of
ISMG-RJ45S0918, which is 180 cm (70.9 inches) in length, is dedicated for the
communications between a ISMG3 inverter and a computer when RS-232
interface is used. This cable has an RJ45 connector on one end and a RS-232 (DB9)
connector on the other end as shown in Fig 2.3.3.3. If RS-485 interface is selected,
then both RJ-45 connectors on the ISMG3 inverter can be used for the cascaded
RS-485 connections shown in Fig 2.3.3.4.