CyberResearch
®
Serial Communications
ETS 2604
CyberResearch, Inc
.
1
25 Business Park Drive
P: (203) 483-8815; F: (203) 483-9024
Branford, CT USA
www.cyberresearch.com
Introduction
Overview
The CyberResearch
ETS 2604
is a four-port RS-232/422/485 Ethernet based serial I/O adapter supporting data rates
up to 230.4 K bps.
The RS-232 compatibility allows for connection to devices utilizing the RS-232 electrical interface, such as
modems, data-entry terminals, and plotters.
RS-422 provides excellent communications for long distance device connections up to 4000ft., where noise
immunity and high data integrity are essential.
RS-485 is optimized for ‘Multi-Drop’ or ‘Party-line’ operations selecting data from multiple peripherals (as many as
31 devices can be connected on an RS-485 bus).
What’s Included
The
ETS 2604
is shipped with the following items. If any of these items is missing or damaged, contact
CyberResearch, Inc.
•
ETS 2604
Ethernet Terminal Adapter
•
CyberResearch Software
•
5 volt power adapter
•
Ethernet cable, straight through (yellow)
•
Ethernet cable, cross over (blue)
Factory Default Settings
The
ETS 2604
factory hardware default settings for all ports are as follows:
Set up for RS422 or RS485.
T = 120 ohm termination between RX+ an d RX -
PU Pull up on RX +
PU Pull up on RX -
1
2
3
4
5
6
7
ON
OF
F
8
EN
T
PD
PU
EN
T
PD
PU
RS-422/485
