Siemens 9350 ユーザーズマニュアル
COM1 Port
9300 Series User’s Guide
Page 148
Chapter 7 - Hardware Reference
Co-existing Hardware Options on the Meter
These are the hardware ordering options that can (and cannot) exist together on
the same meter.
the same meter.
COM1 Port
COM1 is used for RS-485 communications. If you have the ModemGate option on
your meter, COM1 will automatically be set to ModemGate, not RS-485.
your meter, COM1 will automatically be set to ModemGate, not RS-485.
N
OTE
The internal modem option is hardwired to COM1. If you are using ModemGate, then any meter with an
internal modem that will reside on the serial loop must connect to the serial loop using COM2. If COM1
is used, then the two modems (gated meter internal modem and serially looped meter internal modem)
conflict during communication.
internal modem that will reside on the serial loop must connect to the serial loop using COM2. If COM1
is used, then the two modems (gated meter internal modem and serially looped meter internal modem)
conflict during communication.
RS-485 Connections
RS-485 connections are made via the captured-wire connectors on the rear of the
meter. Devices can be connected in series using RS-485 (see diagram to the left). Be
sure not to ground the wires at both ends.
meter. Devices can be connected in series using RS-485 (see diagram to the left). Be
sure not to ground the wires at both ends.
The specifications for RS-485 communications are as follows:
Profibus
Ethernet
Modem
Digital
Inputs
Inputs
Digital
Outputs
Outputs
Analog I/O
Profibus
No
Yes
No
Yes
No
Ethernet
No
Yes
Yes
Yes
No
Modem
Yes
Yes
Yes
Yes
Yes
Digital Inputs
No
Yes
Yes
Yes
Yes
Analog I/O
No
No
Yes
Yes
Yes
Specification
Value
Baud Rates
Up to 19,200 bps (default is 9,600 bps)
Duplex
Half
Supported Protocols
ION (default), Modbus RTU, DNP 3.0, EtherGate (COM2), ModemGate
(COM1), and Factory
Isolation
Optical isolation from all other inputs and outputs
SH + -
SH
COM
RS-485
+
-