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メディア・コンバーター Amplicon Magic 485F9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 485F9 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.
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UK
International
UK
International
www.amplicon.co.uk
Magic 485F Adapter
01273 608 331
+44 1273 608 331
01273 570 215
+44 1273 570 215