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4.5.2 RS-232C
The RS-232C serial communication interface is available through a DB9 female connector located
on the inside of the UPS. This interface allows control of the UPS from a computer network
running TOSHIBA RemotEyeII™ software. The computer and the UPS are connected through a
serial RS-232C communication port. The available data from the UPS, via the RS-232C
communication link, is shown below:
Input Voltage Output Voltage
Input Frequency Output Frequency
Battery Voltage Output Current
Operating Conditions
UPS Operating Status
(Described as “yes or “no”)
Utility Power OK
Low Battery Voltage Detected
UPS in BYPASS Mode
UPS in NORMAL Mode
Input and Output Frequency Synchronized
UPS FAULT Occurred
Fault Details
(Described as “occurred” or “not occurred”)
DC Bus Over-Current
DC Bus Over-Voltage
DC Bus Under-Voltage
Input Over-Current
Overheat
Overload Being Timed
Overload (allowable time exceeded)
Output Over-Voltage (during Normal Mode)
Output Under-Voltage (during Normal Mode)
The connector pin assignment and female connector outline are illustrated below.
Pin I/O Symbol Description
1 This pin is not used
2 Input RXD Receive Data
3 Output TXD Transmit Data
4 Output DTR Data Terminal Ready
5 - SG Signal Ground
6 Input DSR Data Set Ready
7 Output RTS Request To Send
8 Input CTS Clear To Send
9 This pin is not used
DB9 Female connector outline
(facing connector)
54321
9876
4.5.3 UPS Shutdown (via RS-232C)
When the UPS is operating from its internal batteries, a 'shutdown' order can be sent to the
UPS instructing it to turn OFF after a user-specified amount of time. This function can
allow you 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 by following the directions listed on the RS-232C screen.
4200FA CT/XT User’s Manual 30