Repotec RP-UPH, User Manual

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8. COMPUTER INTERFACE 

8.1 communication interface 

The communication interface (DB9 port) on the back of the UPS may be 

connected to a host computer. The port provides two different modes for 

communicating with the computer like below. 

1. Supply dry contact function (like RUPS of Megatec Company) 

The port simulates relays closing to communicate with the computer. Its 

major functions are as follows. 

(1) To broadcast a warning when power fails. 

(2) To close any open files before the battery exhausted out. 

(3) To turn off the UPS. 

2. Supply RS-232 for monitoring software (like 

RUPSII 

or 

UPSilon 2000

 of 

Megatec Company) 

The UPS communicates with the computer by sending out RS-232 data 

streams to one of the serial ports. By this method the user is able to monitor 

the following parameters. 

Input Voltage 

Indicates the present input voltage to the UPS 

system when AC power is present. 

Output Voltage

Indicates the present output voltage of the UPS. 

AC Frequency 

Indicates the actual output frequency of the UPS. 

Battery Voltage

Indicates the present DC voltage of the UPS 

battery. 

Temperature 

Indicates the actual temperature inside the UPS. 

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8.2 DB9 PIN Assignment 

PIN 2: RS232 RXD 

PIN 3: RS232 TXD 

PIN 5: GND   

The other PINs have no function. 

DB9 INTERFACE CONNECTOR