Email contact notes:

please note that general information on RS485, RS422, RS232 or other communication standards can be found at the following locations:

If you need help selecting a specific product or need an answer to a specific communications application/problem, please call us at: 513-874-4796

When contacting us by email, please provide your name, address and phone number.
       (We will return calls in the US and Canada only.)

Where applicable, please provide us with the following basic information concerning your communications application:

• RS485 (2-wire, half-duplex), RS422 (4-wire, full-duplex), RS232, etc.
• Baud rate and communications specification (eg. 9600,N,8,1).
• Network distance (end-to-end), number of nodes (if multi-drop).
• Industrial/office environment, indoor/outdoor, isolated/non-isolated, etc.

Important Note: Due to excessive "junk" e-mail we will be suspending our e-mail address ron@rs485.com by Oct 31, 2009.

If you need to contact us (and need to include drawing, photos or other attachments), please use the e-mail address above. You must type in this e-mail address.  We have done this to eliminate "junk" e-mails.