Crestron st-com 用户手册

Crestron ST-COM 

 

RS-232/422/485 COM Module

There are 10 LED indicators located on the front panel of the ST-COM. Refer to 
illustration below and descriptions that follow.  

 

This LED illuminates when 12 volts (from power pack) or 24 volts DC (from 
network) is supplied to the ST-COM. 

This LED illuminates when communication between the ST-COM and either the 
SmarTouch STS or Cresnet system is established. Illumination indicates that the 
SIMPL program currently loaded has a network device defined at the same NET ID 
as the ST-COM.  

These LEDs flash when the ST-COM receives data from the serial device attached to 
the respective COM ports.  

These LEDs flash when the ST-COM transmits data to the serial device attached to 
the respective COM ports.  

If RTS/CTS handshaking is enabled, these LEDs illuminate when the ST-COM is 
ready to receive transmission of data from a serial device attached to the respective 
COM ports.  

These LEDs illuminate when the serial device on the respective COM port is ready 
to accept transmission of data from the ST-COM. This “Clear to Send” signal is 
available only if RTS/CTS handshaking is enabled; signal is controlled by external 
serial device. If CTS signal is not connected (in cable), the signal is held high and the 
LEDs are extinguished.  

The table on the next page provides a summary of leading specifications for the  
ST-COM module. Dimensions and weight are approximations rounded to the nearest 
hundredth unit.  

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