Liebert GXT2-4500RT230 manual Communications Interface Port, Pin 4 Remote Shutdown on Battery

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Communications

10.0COMMUNICATIONS

10.1Communications Interface Port

The UPStation GXT2 UPS has a standard DB-9 serial port female connector located on the rear of the UPS unit. Several signals are provided on this port and are assigned as follows:

Table 2 DB-9 pin assignment

DB-9 Assignment Description

Pin

1Low Battery (open collector)

2UPS TxD (typically RS-232 levels)

3UPS RxD (typically RS-232 levels)

4Remote Shutdown (5-12VDC, 10-24mA max; battery operation)

5Common

6Remote Shutdown (short to pin 5); all modes of operation

7Low Battery (open emitter)

8Mains Fail (open emitter)

9Mains Fail (open collector)

 

Pin Assignment

Collector to Emitter*

 

6

7 8

9

(+)

Open

 

 

 

 

Collector

 

 

 

 

330 Ohms

 

 

 

 

 

(-)

Open

1

2

3

4

5

Emitter

 

*Maximum voltage and current on pins 1, 7, 7 and 9 are 60VDC and 10.0 mA

10.2Pin 4 - Remote Shutdown on Battery

1.1. This pin is functional only when the UPS is in battery mode. If the UPS is being powered by the mains, Pin 4 will ignore any signal on this pin.

2.2. Pin 4 requires a 5-12 VDC signal to shutdown. This normally comes form the serial port using Liebert's contact closure cable. It cannot be used with just a contact closure unless the relay is used to switch a voltage source. A 5-12 VDC signal for 1.5 seconds or greater is required to signal a shutdown. Signals for less than 1.5 seconds will be ignored. After Pin 4 receives a shutdown signal for 1.5 seconds, the command cannot be canceled.

3.3. A battery shutdown signal on Pin 4 will NOT cause an immediate Shutdown. A shutdown signal will start a 2-minute shutdown timer. The timer cannot be stopped. After 2 minutes, the UPS will shut down.

4.4. If the mains returns during the 2-minute timer countdown, the shutdown timer will continue until the end of 2 minutes and the UPS will turn OFF. The UPS must remain OFF for at least 10 seconds even if AC input power Returns before the UPS turns OFF. This serves to reset and restart the server.

Whether the UPS turns back ON when power is restored depends on the auto-restart setting: enabled or disabled.

If the auto-restart is disabled, the UPS will not restart after performing the 2-minute shutdown delay.

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Contents GXT2-6000RT230& GXT2-4500RT230 Power AvailabilityPage Table of Contents Troubleshooting MaintenanceSpecifications Operating InstructionsImportant Safety Instructions Glossary of Symbols Introduction Battery Charger Rectifier/Power Factor Correction PFC CircuitInverter System DescriptionDC-to-DC Converter BatteryDynamic Bypass Major Components Main Frame and ElectronicsGXT2, rear view Internal Battery PacksPower distribution boxes, basic, optional Removable Power Distribution BoxWHAT’S Included GXT2 Configuration ProgramInstallation and Configuration Install the Main CabinetTower UPS Installation Rack-Mount UPS InstallationQuantity Installing the Adjustable Rack-Mount Kit-Sold SeparatelyM4 nuts External Battery Cabinet Installation Connect Input/Output Power Connect the Internal Batteries Using the External ConnectorStorage Distribution Box Electrical ConnectionsPD-CEHDWR and PD-CEHDWRBYP Terminal Block Connections Electrical specificationsInitial START-UP and Electrical Checks What You Will Need Configuration ProgramControls and Indicators ON/Alarm Silence/Manual Battery Test ButtonStandby/Manual Bypass Button Battery Level Indicators 5 Green Load Level Indicators 4 Green, 1 AmberFault Indicator LED Red Bypass Indicator LED AmberBattery Mode Operation Normal Mode OperationBypass Mode Operation Battery Recharge ModeCommunications Interface Port Pin 4 Remote Shutdown on BatteryCommunications DB-9 pin assignmentUPS Intelligent Communications Repo switch connection diagram Remote Emergency Power OffMaintenance Internal BatteryInternal Battery Replacement PD-CEHDWR-Manual Bypass Switch Available Disconnect AC Power ConnectionsReconnect Indicator meanings TroubleshootingLED status Diagnosis/Audible alarm Troubleshooting guide Alarm conditions Troubleshooting guide cont’dBattery run times Auto-Learning Battery Run Times UPS specifications SpecificationsExternal battery cabinet specifications Model Number Power distribution specificationsSpecifications Page Company Behind the Products Technical Support/ServiceLocations