Eos –Gate Installation and operation manual
All the information provided with this document are property of Carlo Gavazzi Controls SpA
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5.3 Connecting the RS-485 ports to a serial RS-485 network
The Eos-Gate is provided with 2 RS-485 ports:
•
Serial port 1: to be connected to Eos-Array / Eos-Array Lite devices and Carlo Gavazzi’s AC
meters
•
Serial port 2: to be connected to third party devices
The connection to a serial RS-485 bus must be done following the relevant best practices. Please
read the appendix “Modbus over serial line guidelines” at the end of this document.
An RS-485 network installed or operated without following the relevant prescriptions and guidelines
can cause problems to data communication and damages to the connected devices.
RS-485 connection to Eos-Gate
•
Serial port 1: to be connected to Eos-Array /
Eos-Array Lite devices and AC meter
•
Serial port 2: to be connected to third party
devices
IMPORTANT NOTE: only RS-485 Bus must be used even if
the device is designed to provide serial connectivity over RS-
485, RS-422 and RS-232 for future enhancements
Connection guidelines
Eos Array/Eos Array Lite/
AC meter AC Meter
Eos-Gate RS-485 pinout
PIN
RS-422/485-4W RS-485-2W
1
TxD-(A)
-
2
TxD+(B)
-
3
RxD-(A)
Data+(B)
4
RxD-(A)
Data-(A)
5
GND
GND
6
-
-
7
-
-
8
-
-