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6.0
UPS Control Interface (Contd.)
6.2
RS-232C Communication Interface
The RS-232C serial communication interface is a standard feature and is available
through a DB9 female connector located on the back side of the UPS (See Section 9.1).
This interface allows monitoring and control of UPS in conjunction with Toshiba UPS
software accessories. The available data from the UPS, via the RS-232C communication
link, is shown below:
Operating conditions
UPS operating status
(described as 'yes' or 'no')
'Fault' details
(described as 'occurred'
or 'not occurred')
The connector pin assignment and female connector outline are illustrated below.
RS-232C Connector Pin Assignment
Pin
1
2
3
Output
4
Output
5
6
7
Output
8
9
6.2.1
UPS Shutdown (via RS-232C)
When the UPS is operating from its internal batteries, a 'shutdown' order can be
sent to the UPS telling it to turn OFF after a user-specified amount of time. This
function can allow the user to stop discharging the UPS batteries after an orderly
system shutdown has been completed. The UPS can be programmed to turn
OFF up to 8 minutes after the 'shutdown' command is given. This command can
be cancelled before the specified time has elapsed. Once power is restored after
this command is issued, the UPS must be manually reset to once again operate
on-line. See Section 5.10 System Reset.
TOSHIBA
I/O
Symbol
Description
This pin is not used
Input
RXD
Receive data
TXD
Transmit data
DTR
Data terminal ready
——
SG
Signal ground
Input
DSR
Data set ready
RTS
Request to send
Input
CTS
Clear to send
This pin is not used
Output voltage
Output current
Battery voltage
Input frequency
Output frequency
Utility power OK
Low battery voltage detected
UPS in BYPASS mode
UPS in NORMAL mode
Input and output frequency synchronized
UPS 'fault' occurred
DC bus overcurrent
DC bus overvoltage
DC bus undervoltage
Input overcurrent
Overheat
Overload being timed
Overload (allowable time exceeded)
Output overvoltage (during NORMAL mode)
Output undervoltage (during NORMAL mode)
DB9 Female Connector Outline
5
22
(facing connector)
4
3
2
1
9
8
7
6
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