Section VI
Control Interface Details
006-0007068 UPS-1500-S-2S Guide
Rev E
48 of 60
09/10/20
RS232 Serial Interface
The same User I/O female high-density DB15 connector also provides for an RS232 interface
between the UPS and the host/system computer. The interface has a 115.2k baud with eight
data bits, no parity bit and one stop bit. The pin assignments and functions for this RS232
interface are as follows:
Signal
Pin Number
Function
GND
4 and 5
Ground reference for RX and TX signals
RX
3
RS232 DCE/UPS Device Receive signal
TX
2
RS232 DCE/UPS Device Transmit signal
The RS232 port provides readback of UPS’s state, as well as the configuration and control of the
UPS’s operation. The port can be used from a standard terminal interface, or from a custom
computer application.
