GE Power Supply user manual RS232, Dry Contact

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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	(AC Fail)
Pin 8 ------------------------	Pin 8

OPM_GTU_19X_1K0_3K0_XUS_V014 15 GT-UL Series: User manual 1.2 (US)