Справочник Пользователя для JTECH Communications Inc. SERVALERT200

 

In order to communicate with the SmartAlert via an RS-232 interface, an RS-232 
baud rate, message protocol, and message format must be defined and adhered 
to by any software application wishing to successfully send pages.  

 
Data Connection 
Five lines are connected on the Female DB9 on the transmitter. These lines are 
illustrated below: 
 
 
 

 
 
 
1) No 

Connection 

2) 

Transmit Data from SmartAlert Transmitter out to Host (Attached to Line 
Driver Transmit Side) 

3) 

Receive Data from Host into SmartAlert Transmitter (Attached to Line 
Driver Receive Side) 

4) No 

Connection 

5) Signal 

Ground 

6) No 

Connection 

7) 

Request to Send Line from Host into SmartAlert Transmitter (Attached to 
Line Driver Receive Side) 

8) 

Clear to Send Line from SmartAlert Transmitter out to Host (Attached to 
Line Driver Transmit Side) 

9) 

No Connection  

 
Power Connection 
Power is supplied via a 120 volt AC input and 13.8 volt DC output wall adapter. 
The physical configuration of the power plug is via a 2.1mm internal diameter 
negative voltage and 5.5mm external diameter positive voltage. 
 

•

  Center Negative at 13.8 volts DC.