1. DB-9 interface pins Definition

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2 I. unction description II. Dry contact card is UPS options, which is used to provide UPS internal status to the outside or control peripheral device according to UPS status in the form of dry contact. Card-insert dry contact adopts golden-finger interface, you can insert it into SNMP slot of the working UPS directly. Introduction of dry contact interface It mainly introduces DB9 interface pins definition and function of card-insert dry contact. 1. DB-9 interface pins Definition DB-9 pin No. Function description Input/output 1 UPS Failure output 2 UPS Summary Alarm output 3 GND 4 Remote Shutdown input 5 Common Source 6 Bypass Active output 7 Battery Low output 8 UPS ON output 9 Utility Failure output 2

3 2. DB-9 interface pins instruction Phenomena Function Description Reason PIN1, PIN5 ON UPS Failure UPS internal failure PIN2, PIN5 ON UPS Summary Alarm 1. UPS is on battery mode. 2. Battery low. 3. UPS internal failure. PIN3 PIN4 PIN5 GND Remote Shutdown Common source The outside input remote shutdown signal. PIN6, PIN5 ON Bypass Active Bypass powers the load. PIN6, PIN5 OFF UPS ON Inverter powers the load PIN7, PIN5 ON Battery Low Battery Low PIN8, PIN5 ON UPS ON Inverter powers the load PIN8, PIN5 OFF Bypass Active Bypass powers the load PIN9, PIN5 ON Utility Failure Utility failure 3. DB-9 internal interface Route 3

4 4. DB-9 interface electric parameter Diode Relay Parameter Symbol MAX UNIT Reverse Voltage VR 6 V Forward current IF 80 Ma Peak Forward current IF(peak) 1 A DC Voltage VDC 28 V DC Current IDC 7.0 A AC Voltage AC Current VAC IAC V V A A 5. Application instruction of dry contact card Peripheral monitoring device provides regular power to common terminal. Take the shown circuit for example, every signal terminal connects to relevant indicator and remote shutdown key, then it can achieve monitoring the UPS remotely. 4

5 6. Pins definition of connecting terminal on the board Terminal No. Terminal function Terminal No. Terminal function 1 UPS failure NC(normally closed) 9 Invert on NC 2 UPS failure NO(normally open) 10 Invert on NO 3 Bypass status NC 11 Utility failure NC 4 Bypass status NO 12 Utility failure NO 5 UPS alarm NC 13 Operation indication NC 6 UPS alarm NO 14 Operation indication NO 7 Battery low NC 15 Common source 8 Battery low NO 16 Common source For the function of connecting terminal on the board, you can refer to DB9 interface pins instruction. The wire connecting is also similar to DB9. It also provides normally open contact (even terminal pin) besides the normally closed contact (odd terminal pin). For function definition of connecting terminal, you can also get relevant information from the silk-print on the rear of the card. III. Product appearance 5

6 IV. Range of use It applies to high frequency on-line UPS with SNMP slot. V. Application field 1. IBM server, PC machine, work station and other device application. 2. Industry device automatic control and communication application. 3. Dry contact card only provides interface (dry contact), users make application software themselves. VI. Installation 1. Open the cover plate of SNMP SLOT on the rear panel of UPS. 2. Insert dry contact card directly along the gap of SNMP SLOT. 3. Insert dry contact card until the metal plate of DB9 interface clings closely to surface of UPS rear panel. It indicates the card insertion is OK. Then use the screw lock and fasten the dry contact card. 6

7 4. Connect with monitoring device by connecting wire of dry contact card. The monitoring device will display and control UPS operating status, to achieve remote monitoring of UPS operation. 7

8 VII. Trouble diagnosis and elimination When the UPS is working, install the dry contact card correctly, after the card getting the power, you will get operating status of the card by the status of operation indication terminal. If the card gets the power, but the communication connection with UPS is cut off, there will be tick 1 time per second in the card. If connect the indication circuit to pin 13/14 of the terminal block, you will get a 0.5Hz on-off signal. If the card operates all right, pin 14 of the terminal block will be connected to common terminal, and pin 13 is off. After confirmed that the UPS is working, and the card is installed correctly, if continuous once per second tick is heard in the card or the status of operation indication terminal is wrong, please contact the agency. 8