iTrust UH11-0060 - Dry Contact Communication Mode

RS-232 communication data format
Baud rate ---------- 4800bps
Byte length ---------- 8bit
Stop bit ---------- 1bit
Parity check ---------- none
Dry Contact Communication Mode
Port description
NC
NC
GND
BATTERY LOW
OFF
GND
NC
NC
1
2
3
4
5
6
7
8
9
MAIN FAILURE
Pin 2: this pin turns from OPEN to CLOSE in the event of mains failure, its
normal state is OPEN;
Pin 5: this pin turns from OPEN to CLOSE in the event of battery low voltage,
its normal state is OPEN;
Pin 6: when applying +5V voltage for more than 1 second, the UPS is turned off;
Pin 4: signal ground;
Pin 7: signal ground;
Other pins: unconnected.
Dry contact communication mode provides the following functions:

Provide mains fault information in the event of mains failure;

Provide battery low voltage information when the battery
discharge is about to terminate;

Provide OFF control of UPS
50 Appendix 1 Communication Port
E1-20010916-C-1.0