9300 Series User’s Guide COM 2 Port
Chapter 7 - Hardware Reference Page 149
Connections
1The 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.
NOTE
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