Liebert Power Supply Communications Interface Port, UPS Monitoring, Maintenance

COMMUNICATIONS INTERFACE PORT

The PowerSure™ Interactive UPS contains a standard DB-9 receptacle located on the rear of the UPS unit. Several signals are provided on this port and are assigned as follows:

PIN	ASSIGNMENT DESCRIPTION
1	Low Battery (open collector)
2	UPS TxD (typical RS-232 levels)
3	UPS RxD (typical RS-232 levels)
4	Remote Shutdown (5-12V DC, 1.0 mA. max.); battery operation
5	Common
6	No connection
7	Low Battery (open emitter)
8	Mains Fail (open emitter)
9	Mains Fail (open collector)
	Pin Assignment	Collector to Emitter*

*Maximum voltage and current on pins 1, 7, 8, 9 is 80V DC; 10.0 mA.

UPS MONITORING

The PowerSure™ Interactive UPS has the capability of being monitored with stand alone computers, network workstations, network servers, or UNIX hosts via the DB-9 receptacle located on the rear of the UPS.

This capability is used in applications requiring the UPS to provide status and power monitoring information to the computer system. For example, during a mains power failure, the information can be used by the computer’s operating system or application program to automatically save information in buffers, to close files, and shut down operations prior to battery capacity depletion.

Monitoring of the UPS via a computer system is easily made with a Liebert SiteNet® 1 shutdown kit (sold separately). Consult your local Liebert representative to determine the correct software kit for your application. The kit includes special purpose cable and shutdown software.

UPS INTELLIGENT COMMUNICATIONS

The PowerSure™ Interactive UPS has the capability to communicate intelligently with stand alone computers, network workstations, network servers, or UNIX hosts via the DB-9 receptacle located on the rear of the UPS. By purchasing the optional Liebert SiteNet® 2 software package (sold separately), intelligent communications allows the following capabilities:

∙Quantitative monitoring of mains and UPS power

∙Quantitative monitoring of internal UPS parameters

∙Periodic tests of battery quality and replacement notification

∙Timed and delayed shutdown of the UPS

∙Logging of power disturbances and anomalies

Consult your local Liebert sales representative for more information about SiteNet® 2 software.

UPS INTELLISLOT™ COMMUNICATIONS

The PowerSure™ Interactive UPS contains an Intellislot™ communications port for the optional internal Ethernet SNMP card. Optional SiteNet® SNMP Manager software is available to allow communication through several network management systems. Contact your local Liebert representative, dealer, or reseller.

CAUTION: TO MAINTAIN SAFETY (SELV) BARRIERS AND FOR ELECTROMAGNETIC COMPATIBILITY, SIGNAL CABLES SHOULD BE SEGREGATED AND RUN SEPARATELY FROM ALL OTHER POWER CABLES, WHERE APPLICABLE.

MAINTENANCE

The PowerSure™ Interactive UPS requires very little maintenance. The batteries are valve regulated, nonspillable, lead acid, and require that they be kept charged to obtain their designed life. The UPS continuously charges the batteries when connected to the mains supply.

When storing the UPS for any length of time, it is recommended to plug the UPS in for at least 24 hours every four to six months to ensure full recharge of the batteries.

The PowerSure™ Interactive UPS is designed to allow the user to safely replace the batteries. Read the safety cautions before proceeding. Contact your dealer to obtain the appropriate replacement battery kit.

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