Delta Electronics 3KVA, 700VA manual Dry Contact

The RS-232communication 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 utility status

6)Providing the power switch function for computer to turn on/off the utility on schedule for power saving

7)Adjustable Transfer voltage

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

8-2 Dry Contact

Pin1	: The pin is normally open. When battery low, pin1 and pin5 are connected
	via photo coupler.
Pin3	: The UPS will shut down when a high level (5~12V) sustained for at least
	3.8 seconds is applied.
Pin5	: Signal ground.
Pin6,7	: Reserved.
Pin8	: The pin is normally open. When utility fails, pin8 and pin5 are connected
	via photo coupler.

CABLING: The user must use the special cable. The connection is described as follows:

PC (female)	UPS (male)
Pin1------------------	Pin1 (battery Low)
Pin3------------------	Pin5 (GND)
Pin4------------------	Pin3 (Shutdown)
Pin7------------------	Pin6
Pin7------------------	Pin7
Pin8------------------	Pin8 (AC Fail)

The communication port at the back of the UPS may be connected to a computer. This port allows the computer to monitor the UPS and control the operation of the UPS in some cases.

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SHEET 28 TO 29