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4.2
RS232
The RS-232 communication port provides the following functions:
1 - Monitoring charger status
2 - Monitoring battery status and condition
3 - Monitoring inverter status
4 - Monitoring UPS status
5 - Monitoring the AC utility power status
6 - Turn on/off UPS on schedule for power saving
7 - Adjust transfer voltage
Pin Assignment:
Pin 2
:
PC receives line RS-232 data from UPS.
Pin 3
:
PC transmits line RS-232 data to UPS.
Pin 5
:
Signal ground.
Pin 4,6,7
:
Reserved for plug and play function.
The UPS data is provided at 2400 bps baud rate and made up of 8 -bit, 1 stop-bit and no parity
bit. All information is encoded in ASCII format.
Hardware:
Baud rate
Data length
Stop bit
Parity
Cabling:
Standard sub-D 9 cable (UPS side: male, PC side: female)
4.3
Dry Contact
Its major functions are some or all of the following:
1 - to broadcast a warning when the AC utility power fails.
2 - to save open files before the battery is exhausted.
3 - to turn off the UPS via computer(s).
Pin Assignment:
Pin 1
: Normally open. When the battery voltage level is low, pin 1 and pin 5 are
connected together via a photo coupler.
Pin 3
: UPS will shut down when a high level (5~12V) is applied for at least 3.8 seconds.
Pin 5
: Signal ground.
Pin 6,7 : Reserved.
Pin 8
: Normally open. When the AC utility fails, pin 8 and pin 5 are connected together via
a photo coupler.
Cabling:
A special cable must be used with a pin assignment as follows:
PC (female)
Pin 1 ----------------------- Pin 1 (Battery Low)
Pin 3 ----------------------- Pin 5 (GND)
Pin 4 ----------------------- Pin 3 (Shutdown)
Pin 7 ----------------------- Pin 6
Pin 7 ----------------------- Pin 7
Pin 8 ----------------------- Pin 8 (AC Fail)
OPM_GTU_TWR_1K0_3K0_XUS_V015
2400 bps
8 bits
1 bit
none
UPS (male)
15
™
Digital Energy
DE GT Series: User manual rev date 8-11- 04
GT Series
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