Dry Contact - Delta 3KVA User Manual

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 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)
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.
UPS (male)
27
SHEET 28 TO 29