Using The Rs-232 Computer Interface Port - biodex 950-275 Installation & Operation Manual

CONTENTS

USING THE RS-232 COMPUTER INTERFACE PORT

The RTM 400's Remote RS-232 Serial Port can be configured through hardware jumpers on the
display circuit board as follows:
1. RS-232 for single treadmill with single host PC COM: Port
2. RS-422 for multiple treadmills attached to a single PC COM port.
• Treadmills are connected with a single "daisy chained" cable. A multi-drop protocol is used.
• 9 PIN D Connector: PIN 2 is XMIT, PIN 3 is RCV, PIN 5 is GND 9600 BAUD, no parity, 8 data
bits, full duplex (See Assembly & Schematic Section for RS-232 Communications Cable dia-
gram)
Protocol
The host PC will be the master and initiate all commands. The RTM 400 should process and
acknowledge each command immediately.
— 15 — BASIC OPERATION OF THE RTM 400