Making Hardware Connections
Manual Documentation Number: ESP904-4513m
Chapter 2
9
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Network
Connector
RJ-45
female
Power jack
2.5 mm Tip (+)
Reset
Switch
Figure 4. Top View of the ESP904
Serial Ports
The ESP904 has four serial ports, each configurable through software as RS-
232, RS-422 or RS-485 interfaces. When in RS-232 mode the interfaces are
configured as DTEs (Data Terminal Equipment).The connectors are DB-9M.
Serial Ports
1
2
3
4
Figure 5. The ESP904 Serial Port Connectors
Serial Server/Port Operational Modes
Using the
ESP Manager
the
ESP904 Serial Server
can be put into
Console
Mode, Default Mode
or
Upgrade Mode
. The serial ports can be configured
for RS-232, RS-422 or RS-485 operation.
Default Mode
When
Default Mode
is selected and the Server Properties are
Updated
(
Saved
) all the configuration settings return to their default values. The
default settings for the ESP904 serial ports are:
Console Mode
for Port 1;
RS-232 mode for Ports 2, 3 and 4.
N
N
o
o
t
t
e
e
:
:
Refer to Chapter 5 for details on Server Configuration settings Refer to Chapter
12 for Serial Server default parameters.
