ATEN IC-485S, IC-485SI User Manual

RS-232 To RS-485

Interface Converter

Read this manual thoroughly and follow the installation procedures carefully to

prevent any damage to the IC-485S / IC-485SI and/or the devices it connects to.

All brand names and trademarks are the registered property of their respective owners.

Packing Checklist

IC-485S / IC-485SI

User Manual

Manual Part No. PAPE-1134-100

Printed in Taiwan 01/1999

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1 x IC-485S or IC-485SI Interface Converter 1 x Power Adapter (DC9V, 200mA) 1 x User Manual

If anything is damaged or missing, contact your dealer.

Warning! This equipment generates, uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio and television reception. It has been tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart J of Part 15 of the FCC Rules which are designed to provide reasonable protection against such interference when operated in a commercial environment. Operation of this equipment in a residential area is likely to cause harmful interference, in which case the user at his own expense will be required to take whatever measures may be required to correct the interference. cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient the receiving antenna. Increase the separation between the computer and the receiver. Plug the computer into a to different outlet so that computer and receivier are on

different branch circuits. Ensure that the mounting screws, attachment connector screws, and ground wires are

tightly secured. Ensure that good quality, shielded and grounded cables are used for data

communications.

If necessary, the user should consult the dealer or an experienced radio/TV technician for additional suggestions.

Overview

Although RS-232 serial ports are found on almost every computer, because of their slow transmission speeds, limited range, and limited networking capabilities, they are not an effective solution for industrial strength long distance communications systems.

Systems based on the RS-485 standard, on the other hand, are not subject to the RS-232 limitations because they utilize different voltage lines for the data and control signals.

The IC-485S / IC-485SI Converter is a bidirectional converter that transparently converts RS-232 signals to RS-485 signals (and vice versa). The IC-485S / IC-485SI provides Point-to-Point; Multidrop; and Simplex operations over distances of up to 1200 m (4000 ft.). The IC-485S also provides a Monitor operation. Thus, they permitt the creation of reliable long distance data communications systems using standard computer hardware.

Switch Configuration

The IC-485S / IC-485SI is configured by setting two slide switches.

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SW1 is used to select the Device Mode SW2 is used to select the Transmitting and Receiving Mode

IC-485S

Position SW1 SW2

1 DCE TxON, RxON

2 DTE TxRTS, RxRTS

3 Monitor TxTRS, RxON

IC-485SI

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