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RS-485 Connections
Some RS-485 devices are marked opposite from the RS-485 standard that defines the
Data B line as positive relative to Data A during a Mark state before enabling the
transmitter, and after transmitting before tri-stating. If the RS-485 devices don’t
respond, try swapping the Data B and Data A lines.
If you want to connect 4-Wire RS-485 devices, you can use the RS-422 Mode
provided that the DSE-410D will be connected as a Master in a single master system.
If you have multiple masters, you cannot use this device because it does not tri-state
the transmitter in RS-422 mode.
Document Number: 940-0186-100 – DSE-410D Owner’s Manual 13
Quatech, Inc. - 5675 Hudson Industrial Parkway, Hudson, OH 44236 – 330.655.9000
http://www.quatech.com