RS485 to RS232 Converter Card User Manual Version 1.00 RMS Technologies 2533 N. Carson St. #4698, Carson City, NV 89706-0147 1-877-301-3609 sales@rmsmotion.com www.rmsmotion.
Thank you for purchasing the RS485-232 converter card. This product is warranted to be free of manufacturing defects for one (1) year from the date of purchase. DISCLAIMER The information provided in this document is believed to be reliable. However, no responsibility is assumed for any possible inaccuracies or omissions. Specifications are subject to change without notice.
Table of Contents 1 Features ........................................................................................ 4 2 Pinouts .......................................................................................... 4 3 Connection Specifications .............................................................. 5 Serial COM Port ............................................................................. 5 RS485 Connection with full duplex ................................................
1 Features • • • • • RoHS compliant Input voltage of +7 to 40 VDC Connection to PC via serial COM port Easy 3-Pin connection to user’s RS485 device Small, compact device 2 Pinouts The green screw terminal connector is for main power. The 3-pin header is for RS485 communication.
3 Connection Specifications This card is used with several products (see section 7). Below is a general diagram of how to connect the RS485-232 converter card to a PC and an RS485 communicating device. Figure 2:General connections diagram For specific connection specifications with the IMC/IMCE17, IMC/IMCE23, R256, or R356, please see the specific product manual.
RS485 Connection with full duplex If your RS485 device is a full duplex, or 4-wire device, below is the recommended connection to the RS485-232 converter card.
4 Mechanical Specifications 2 x 4-40 screws are provided on the DB-9 side of the unit 5 Electrical & Operating Specifications Power supply requirement Voltage +7 to 40 VDC Operating Temperature Temperature range: -20°C to 75°C RS485-232 Converter Card Page 7 3/20/2009
6 Comparison with Obsolete RS485-232 card The non-RoHS converter card is no longer available. Changes were made to the pinouts of the RS485 connection. Description of change: Old Converter card RMS p/n: ACC-01 • • • • • New Converter Card RMS p/n: ACC-03 OLD RS232 Converter Card RMS Part Number: ACC-01 Not RoHS Compliant Red 4-Pin connection for PWR, Ground, RS485 A, RS485 B.
Pinout differences: Pin 1 Pin 1 Power Connector (Green): Pin 1 2 Function PWR Ground Æ Pin 1 2 (no change) Function PWR Ground Communication Connector (White): Pin 1 2 3 4 Function PWR GND RS485 B (+) RS485 A (-) Æ (change) Pin 1 2 3 Function RS485 A (-) GND RS485 B (+) How to connect with old cable: If you have a cable with a Red 4-Pin connector, simply cut off this connector, strip the wires and reconnect to a 3-Pin connector in the following manner: Pin # Pin 1 Pin 2 Pin 3 Pin 4 New 3-Pin
7 Products The following products are used with the RS485-232 Converter Card in order to receive commands or parameters via PC.
