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Siemens 9350 Manuel D’Utilisation

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9300 Series User’s Guide
COM 2 Port
Chapter 7 - Hardware Reference 
Page 149
Connections 
1
The lengths of all (+ and –) cable segments must be counted including those that connect devices to 
terminal blocks. 
Terminal connections on the meter are marked as follows: 
COM 2 Port
COM 2 is used for RS-485 communications and can be configured as an EtherGate.
RS-485 Connections
The specifications for RS-485 communications on COM 2 are the same as those for 
COM 1.
N
OTE
On 9330 and 9350 meters with the Ethernet card, COM2 is hardwired for EtherGate only, and cannot
be used for serial communication.
Specification
Description
Cable Type
Good quality shielded twisted pair cable, AWG 22 or larger. 
Max. Cable Length
4,000 ft. (1,219 m) 
1
Max. number of devices per bus
32
Marking
Terminal Function
SH
RS-485 Shield (electrically connected to chassis ground)
+
RS-485 Data Plus
-
RS-485 Data Minus