15.2.11 RS-232 Interface Parameters, Options | Liebert 100-1000A

Specifications

15.2.11 RS-232 Interface Parameters

The service terminal interface parameters are the following settings and cannot be changed.

Table 23 RS-232 settings

Parameter	Setting

Interface	RS-232 Using EIA Voltage Levels

Baud Rate	9600

Parity	None

Number of Data Bits	8

Number of Stop Bits	1

Hardware Flow Control	Off

Terminator	<CR> <LF>

Handshaking	Not supported

Structure	Full duplex

Local Echo	Off

15.2.12 Maintenance Bypass

The Liebert STS2 is configured to allow the unit’s electronics to be bypassed to either input source for maintenance without interruption of power to the load.

The Liebert STS2 is furnished with key-interlocked maintenance bypass breakers to configure the bypass.

Liebert STS2 units have all electronics isolated from the input, output, and bypass connections to allow safe servicing of any components without access to hazardous voltages when the unit is in maintenance bypass.

See 10.4 - Maintenance Bypass on page 67 for instructions using the Color LCD Graphical Display unit and 14.2.3 - Maintenance Bypass on page 108 for instructions using the LED units.

15.2.13 Fuseless Design

All Liebert STS2 units are fuseless and are UL rated for use with upstream circuit breakers only.

15.2.14 Options

The following options are available for the Liebert STS2:

Programmable Relay Board	Remote Source Selection
Optimized Transfer	Key Lockout Switch
Distribution Cabinet With I-Line Panelboard	Redundant Output Breaker
Input Contact Isolator Board	Transfer Inhibit
Comms Board w/Liebert SiteScan and Modem Interface	Input Junction Boxes and Cable
Liebert IntelliSlot SNMP/Web/Modbus 485 Card	Seismic Floor Anchors
LED Display	Seismic Floor Stand - 18", 24", 30" and 36"
See 6.0 - Options for more information.

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Liebert 100-1000A 15.2.11 RS-232 Interface Parameters, Fuseless Design, Options, RS-232 settings, Parameter Setting

Contents

Liebert STS2 Page Table of Contents Alarm and Faults Theory of Operation Communication Interfaces Liebert STS2 Touch Screen Display Specifications Event Message Help Text 17.0 Maintenance Figures Tables Important Safety Instructions Overview of Manual Safety Precautions Unloading and Handling External InspectionsUnpacking and Inspections Handling Considerations Internal InspectionsUnit Preparation Recommended Minimum Service Clearances Operating Temperature Range 0 to 40C 32 to 104FHeat Output Operating Environment Altitude Recommended derating for high altitude operation Leveling of the Static Switch Without Anchoring Leveling and Anchoring the Static Switch Using Floor StandLeveling and Anchoring the Unit to the Floor Locating the Liebert STS2 Input And Output Power Connections Power and Control Wiring Input/output conduit plate specifications Input Junction Box Installation-OptionalRating Max. number and size Input junction box dimensions Input junction box terminal wire size rangeLength Width Height Switch Rating Inches mm Switch Rating Power and Ground Lug Wire Range Control Wiring Connections System GroundingSource MICB1 MICB2 Isolation Transformer CB4 CB3 Remote Source Selection Wiring Power SupplyTerminal block 1 and terminal block 2 wire connections Remote source selection terminal block Programmable Relay Board Optimized TransferOptions Programmable relay board pinout Comms Board Input Contact Isolator BoardLiebert IntelliSlot SNMP/Web/Modbus 485 Card Key Lockout Switch LED DisplayRemote Source Selection Redundant Output Breaker Seismic Floor Anchors Input Junction Boxes and CablesSeismic Floor Stand Installation Drawings Detail a Rev PS211800 Rev PS211101 Rev PS211401 PS211801 Seismic anchor Liebert STS2 STS2 Front System Seismic ANCHORING, Figure ONE-LINE Diagram Rev Section A-A ONE-LINE Diagram PS212401 Breaker Drawing 800 1000 amp Liebert STS2 withSingle output PS212801 Liebert STS2 non-automatic circuit breaker schedule ABB Control connection location diagram 100 600 amp Liebert STS2 See Option Location Detail Control Wiring Front View with Front Door Removed Option Location Detail See Note J71 J72J73 J74 Control wiring for the input contact isolator board option Table J51 02-810015-XX Connection No customer ConnectionDB-9 No customer Control wiring for the RS-232 port TXD RXD GND Input Junction BOX Mimic Symbol Description Installation drawing, seismic floor stand 100-250A Installation drawing Seismic floor stand 100-250A Installation drawing, seismic floor Stand 100-250A PS215003 Rev Drawing, seismic floor stand 400-600A Hardware Torque ChartHeight Table PS216001 Rev Seismic floor stand 400-600A PS216002 Rev PS216003 Rev Installation drawing, seismic floor stand 800-1000A Seismic floor stand 800-1000A Front Right Isometric View Rear Right Isometric View Right Side View Side View RightFront View View Introduction to Liebert STS2 Operations System DescriptionRedundancy Modes of Operation Operator Controls Bypass General Description Theory of Operation Emergency Transfer Load Current Transfer InhibitSCR Failure 7 On/Off Sequence Detailed Component Description Controls Operator InterfaceHardware Firmware Audible Alarm Circuit BreakersSCRs Logic Modules Operating Instructions for the Touch Screen Interface Normal System Startup Manual Transfer / Preferred Source Selection Source transfer screen Enabling Remote Source Selection Maintenance BypassTo manually select the preferred source Viewing Slot for the Source 2 Gate Drive Board Touch Screen Viewing Slot for the Source 1 Gate Drive Board To bypass the switch for Source Bypass Procedures for SourceTo return to normal mode Shutdown in Maintenance Bypass Mode Shutdown in Static Transfer Switch ModeNormal System Shutdown Alarm and Faults Event Mask Event Log Event and History LogsHistory Log Alarm Notes List of Messages Alarm Message Description/Cause Action Event messages See Configuring the Input Contact Isolator Settings on Using the RS-232 Port Communication Interfaces Terminal commands Connecting and Using a TerminalKeys Function Groups Parameter Configuring the Liebert STS2 via the TerminalItem Parameter Value Parameter Group settings and valuesValue types User Event Mask Options1 Setting Bitpacked Options with the TerminalComms Options Critical Option Enabling Non-Critical Option EnablingBinary-hexadecimal conversions Hex Putting the Terminal Command Together Setting Event Masks with the Terminal Examples of Event Mask Settings Display Overview Liebert STS2 Touch Screen Display Menu Overview Backspace Using the Optional Key Lockout Switch Using the PasswordTo set or reset the password Changes disabled Changes enabled Configuration Menu Mimic DisplayEvent Controls Event Display To access the User Settings dialog box User SettingsTo set the event masks User settings dialog box Source Set Points Button Range Default Comments To configure the setpoints for each sourceSepoint parameters Liebert STS2 Touch Screen Display System Settings To access the System Settings menuComm Options Option buttons Configuring the Modem To configure the modem Configuring Pager Support Configuring the Input Contact Isolator Settings To configure the Input Contact Isolator relays Standard settings for programmable relays Configuring the Programmable Relay Board SettingsRelay Setting Definition Configuring the Liebert IntelliSlot SNMP/Web/Modbus 485 Card Liebert SiteScan Configuration Saving Your Communications ConfigurationsSystem Options Dual Output Breaker Pole Transfer Switch System IDShunt Wye Output Transformer Logs 13.11.1Event Log13.11.2History Log To use the Event Log Startup Procedure Bypass ProcedureCleaning the LCD Touch Screen Source Transfers Operating the Liebert STS2 LED Display LEDs and Buttons and Key Lockout SwitchFront Panel Controls LED and Push Button Description LED and push button descriptionDescription Action Cause. See 12.0 Communication Interfaces for PC terminal Key Lockout Switch Event Controls Operations Normal System Startup Manual Transfer / Preferred Source Selection Maintenance Bypass 109 When the Liebert STS2 is operating on bypass Normal System Shutdown System Configuration SpecificationsFrequency Input/Output Voltage Grounding Electrical RequirementsInput Surge Suppression Response Time System Components Frame and EnclosureCasters, Leveling and Seismic Anchoring Cooling Access Cable EntranceDoors Color Graphical Display or LED Display Pin Signal Name Function / Comments 15.2.9 RS-232 PortTerminal Port Connections MTA plug pinout RS-232 settings Parameter Setting15.2.11 RS-232 Interface Parameters Fuseless Design Event Message Help Text KeyS1 SCR Short S2 SCR Short S2 SCR Open 119 120 S2 Volt Sense Fail S1 Volt Sense FailS1 SCR Sense Fail S2 SCR Sense Fail S1 Curr Sense FailS2 Curr Sense Fail S1 Gate Drive Fail S2 Gate Drive Fail Heat Sink Overtemp S1 UV RMS S1 UVS1 OV S1 Fail S1 OF/UFS2 UV S2 OV S2 UV RMSS2 UF/OF S2 Fail S1 I-PEAK S2 I-PEAK 130 CB5 S1 BYP Closed 132 133 134 135 136 137 Testing the Liebert STS2 MaintenanceProper Tightening of Nuts and Bolts Changing the Air Filter Support Information Programmable Relay Board Settings Record Channel Channel PRB Notes Input Contact Isolator Settings Record Page Ne t Is tTwor k Care