B&B Electronics ESR901WB - Manual - Manual (Page 18)

Hardware Overview
Manual Documentation Number: ESR901WB-2907m pn6870-rev002
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 Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 – www.bb-europe.com
8 Chapter 2
Figure 1. Front View of the ESR901WB Serial server
Indicators, Switches and Connectors
Power LED
When DC power has been applied (between 10 VDC and 30VDC)
the red power LED is illuminated.
Link Integrity LED
• When the yellow LED is illuminated it indicates that a
connection (link integrity) has been established between the
serial server and an access point.
• If this LED is blinking slowly the ESR901WB is in ad hoc
mode.
• If this LED is blinking quickly the ESR901WB is scanning for
a network.
Network Activity LED
When the green LED is flashing it indicates data is being sent
across the network.
Serial Interface Selector Switch
By setting the Serial Interface Selector Switch the serial interface
on the ESR901WB can be configured for:
• RS-232 operation
• RS-422 operation
• RS-485 (four wire) operation.
For information on RS-422/485, including two-wire RS-485
operation read the RS-422/485 Application Note available on the
B&B Electronics website at www.bb-elec.com
Reset Switch
The Reset switch is a recessed switch located on the front panel of
the ESR901WB. The Reset switch operates as follows: