GFK-0356Q E-1
IC690ACC903 Port Isolator
The IC690ACC903 RS-485 Port Isolator replaces the IC655CMM590 Isolated Repeater/Converter
(also referred to as the “Brick”). The device features 500 volts of isolation in a compact package
servicing all IC693, IC697, and IC200 PLC product lines. The product connects directly to an RS-
485 serial port or though a short extender cable provided with the device. The extension cable is
intended for use in applications where direct connection to the port is obstructed by surrounding
equipment or when it is not acceptable for the device to protrude from a PLC module. The Port
Isolator can operate in either single- or multi-drop mode, which is selected by a slide switch on the
top of the module.
The Port Isolator provides the following features:
• Four opto-isolated signal channels: SD, RD, RTS, and CTS
• Electrical compatibility with RS-485
• Single- or multi-drop operation
• Input termination consistent with standard for serial channels
• A 5V DC/DC converter for power isolation
• Hot insertion is supported
1.7 in FRONT VIEW
0.7 in
TOP VIEW
FRONT VIEW
Multidrop
Switch
2.6 in
Figure E-1. RS485 Port Isolator
E
Appendix
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