Delta Electronics 700VA, 3KVA manual Communication Interface, 8-1 RS-232

8. COMMUNICATION INTERFACE

The UPS provides RS-232and Dry contact protocols in one D-sub 9 connector. Using proper UPS management software and cable, the UPS can be managed over LAN/intranet/internet environment. The pin assignment of the D-sub 9 connector is defined as follows:

ASSIGNMENT DESCRIPTION
PIN
RS-232	Dry Contact

1

Low battery(Open collector)

2

UPS TxD(typical RS-232 level)

3

UPS RxD(typical RS-232 level)

Remote shutdown(5~12V)

4

Reserved for PNP

5

GND

GND

6

Reserved for PNP

Reserved

7

Reserved for PNP

Reserved

8

Utility Fail(Open collector)

9

6	7	8		9
1	2	3	4	5

Open Collector

G N D

Fig 8-1 Pin Assignment Fig 8-2 Open Collector Circuit

Maximum voltage and current on pin 1,8 is 30VDC, 10mA.

8-1 RS-232

Pin2	: PC receives line RS-232data from UPS.
Pin3	: PC transmits line RS-232data to UPS.
Pin5	: Signal ground.
Pin4,6,7	: Reversed for plug and play function.

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