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メディア・コンバーター Amplicon Magic 485F25のPDF 取扱説明書をオンラインで閲覧またはダウンロードできます。Amplicon Magic 485F25 11 ページ。 Rs232 & rs485

RS422 / 485 <–––> TTL

Conversion between the differential signal levels of RS422/485 and the internal TTL levels is

performed by the MAX491 (or equivalent) transmitter and receiver U1. In normal operation the

unit is in receive mode and data is transferred directly to the RS232 port.

When the unit transmits data it is enabled by the FPGA and data flows out on to the RS485 bus.

The unit is configured to echo data back to the receive port, however this can be disabled during

transmission by the setting of Jumper J3.

DTR, DSR and DCD

The RS232 port DSR and DCD inputs are linked to the DTR output to ensure that the RS232

operation does not lock up awaiting a handshake signal.

Power Regulator

Q1 is a low dropout +5 volt regulator to supply the Magic 485F Adapter circuits. The limits of the

input voltage to this regulator are >+5.0 VDC and <+12.0 VDC. Over this range, the output is

between +4.8 and +5.2 VDC.

1.4

Technical Support

Should the Magic 485F Adapter appear defective, please check the information in this manual to

ensure that the product is being correctly applied.

If an application problem persists, please request Technical Support on one of the following

numbers:

Telephone:

Fax:

E mail

Internet

1.5

Repairs

If the Magic 485F Adapter requires repair then please return the goods enclosing a repair order

detailing the nature of the fault. If the product is still under warranty, which is for a period of 12

months from the date of shipment, there will be no repair charge unless the fault has been

caused by misuse.

For traceability when processing returned goods, a Returned Materials Authorisation (RMA)

procedure is in operation. Before returning the goods, please request an individual RMA number

by contacting Amplicon Technical Support by telephone or fax on the above numbers.

Give the reason for the return and, if the goods are still under warranty, the original invoice

number and date. Repair turnaround time is normally five working days but the Service

Engineers will always try to co-operate if there is a particular problem of time pressure.

Page

International

www.amplicon.co.uk

Magic 485F Adapter

01273 608 331

+44 1273 608 331

01273 570 215

+44 1273 570 215