Communication 
Port COM3 
RS-232 compatible serial port (CMOS) 
Data Terminal Equipment (DTE) 
8 pin modular jack 
Half duplex 
Implemented Td, Rd, and 5V power under program control. 
Intended for use with SCADAPack Vision operator 
interface. 
Baud Rates 
(COM1, COM2) 
300, 600, 1200, 2400, 4800, 9600, 19200, 38400 
Baud Rate 
(COM3) 
1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 
Parity 
none, even, or odd 
Word Length 
7 or 8 bits 
Stop Bits 
1 or 2 bits 
Transient 
Protection 
COM1, COM2: 2.5kV surge withstand capability as per 
ANSI/IEEE C37.90.1-1989  
Isolation 
Common ground return connected to Chassis Ground. 
Cable Length 
RS-232 –maximum 10 ft (3 m) 
RS-485 –maximum 4000 ft (1200 m) 
Protocol 
TeleBUS (compatible with Modbus RTU and Modbus 
ASCII) 
Protocol Modes  
Slave, master, master/slave, store and forward 
 
14.4 Visual Indicators 
COM1 
received data    (Rx) LED 
transmitted data  (Tx) LED 
COM2 
received data    (Rx) LED 
transmitted data  (Tx) LED 
clear to send    (CTS) LED 
data carrier detect   (DCD) LED 
COM3 
received data    (Rx) LED 
transmitted data  (Tx) LED 
Status 
Power Mode LED 
Run LED 
Status LED (shows functional status) 
Forced I/O LED 
Digital Inputs / Outputs 
8 LEDs 
Counters 
3 LEDs 
Push-button 
LED power toggle 
 
14.5 Power Supply 
DC power Input  
30V maximum 
10.0 to 11.5V turn on 
9.5V typical turn off 
SCADAPack LP Hardware Manual 
May 26, 2006   
42