SMA Com Gateway, Installation Manual

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6 Connection SMA Solar Technology AG
Installation Manual COMGW-10-IA-en-13 19
6 Connection
6.1 Overview of the Connection Area
SMA C
OM G
ATEW
AY
X3
X2
X4
X5
RS485
RS485
X2
X5
X4
X3
−
+
10-30V
DC
X1
RS4
85
SMA C
OM G
ATEW
AY
RS485
X1
Figure 5: Overview of the connection area
Terminal Explanation
X1 Jack for connecting the voltage supply.
X2 Port for connecting the RS485 devices.
X3 Reserved for future applications.
X4 Network port with status LEDs for connecting to the SMA Speedwire network.
X5 Network port with status LEDs for connecting to the SMA Speedwire network.
6.2 Connecting RS485 Devices
Renewed detection after a replacement or addition
If you replace or add RS485 devices, you must detect the RS485 devices again. To do this,
press and hold the function button on the SMA Com Gateway using a sharp object (e.g.
paperclip) for between 1 and 5 seconds.
Cable requirements:
☐ Cross-section: at least 2 x 2 x 0.22 mm² or at least 2 x 2 x 24 AWG
☐ Shielded
☐ Twisted pair conductors
☐ UV resistant
☐ Maximum cable length across the entire RS485 bus: 1200 m