SEL-2890 Instruction Manual
Date Code 20210715
Installation
Installation
2.2
The initial setting of IP address, network mask, and network gateway
is only permitted via the serial port. To make these settings, connect
the SEL-2890 to your computer serial port with optional interface
cable C663 or C642. This cable provides a 120 Vac to 5 Vdc power
supply.
Figure 2.1
Programming Cable Connection
Figure 2.2
SEL-C642 Cable Wiring Diagram
The left, green LED will pulse when the SEL-2890 is first powered
up (this may take several seconds). This LED should not remain lit if
there is not a functioning Ethernet connection. This is the green
“Link” LED. The red LED on the right indicates data transmission in
or out of the SEL-2890 and is referred to as the “Data Transmission”
LED.
Step 2.
Open an ASCII terminal session to the serial port that is connected to
the transceiver. The default data rate is 19200 bps (for firmware
versions R101–R103, the default speed is 38400 bps). Do not make
an Ethernet connection at this time. At this point, the transceiver will
still be in the mode of forwarding serial data to the network. This
mode needs to be interrupted with AT+++ entered from the terminal.
Note that you have to type the AT+++
string within four seconds from
the “A” to the last “+”. The SEL-2890 will respond with #> prompt
approximately three seconds after the last character is entered. This
SEL-2890
PC
DB-9 Female
SEL-C663
or SEL-C642
P.S.
TXD 2
RXD 3
RTS 7
CTS 8
GND 5
+5 Vdc 1
2 RXD
3 TXD
7 RTS
8 CTS
5 GND
1 DCD
4 DTR
6 DSR
Power
Adapter
COM
+5
SEL-2890
Computer Terminal
Содержание SEL-2890
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