Specifications
CoolMaster User Manual
7
www.coolautomation.com
© 2008 Cool Automation
Specifications
3
Port Definition
3.1
RS232 Interface connector used in Cool Master is D-Type 9-pin DB9 female connector.
Cool Master DB9 Connector front view
DB9 Pin
Signal Lvel
Description
2
±12V
TxD (Data from Cool Master)
3
±12V
RxD (Data to Cool Master)
5
GND
Ground
Connecting Cool Master to Home Automation Equipment
According to RS232 specification cable length should not exceed 25m. RS232 Cable supplied with
Cool Master is 1.5m length suitable for direct connection to PC RS232 serial port.
Please note that for certain controllers it will be mandatory to use cable with cross linked the Transmit(2) and the
Receive(3) pins.