B&B Electronics ESP902 - Manual - Manual (Page 20)

Making Hardware Connections
12 Chapter 2 Manual Documentation Number: ESP901-902_5012m
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 – www.bb-elec.com
B&B Electronics Ltd – Westlink Commercial Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 – www.bb-europe.com
Serial Ports
The ESP901 has one serial port. The port can be configured as a
Console Mode connection or as an RS-232, RS-422 or RS-485
interface to the Serial Server (if any of the DIP switches are in the
OFF position) using the ESP Manager software, via Telnet , or using
the Web Server .
The ESP902 has two serial ports. Port 1 operates the same as the
ESP901 serial port. Port 2 on the ESP902 is an RS-232 only interface.
The RS-232 interfaces are configured as DTEs. The connectors for all
ports are DB-9M.
Serial Port
DB-9 Male
Figure 8. The ESP901 Serial Port Connector
Serial Port 1
DB-9 Male Serial Port 2
DB-9 Male
Figure 9. The ESP902 Serial Port Connectors
Serial Server/Port Operational Modes
Using the ESP Manager the 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. The server also
can be put into
Console Mode by placing all the DIP switches into the
ON position.