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Digital Energy™ GT Series

4.2RS232

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

2400 bps

Data length

8 bits

Stop bit

1 bit

Parity

none

Cabling:

Standard sub-D 9 cable (UPS side: male, PC side: female)

4.3Dry 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)

UPS (male)

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

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DE GT Series: User manual rev date 8-11- 04