Specifications

15.2.11RS-232 Interface Parameters

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

Table 24 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

 

 

15.2.12Maintenance Bypass

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

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

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 107 for instructions using the LED units.

15.2.13Fuseless Design

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

15.2.14Options

The following options are available for the STS2:

Optimized Transfer

LED Display

Redundant Output Breaker

Network Interface Card (NIC)

Distribution Cabinet With I-Line Panelboard

Seismic Floor Stand - 18", 24", 30" and 36"

Input Junction Boxes and Cable

Export Crating

Comms Board w/SiteScan and Modem Interface

Internal Modem

Input Contact Isolator Board

Remote Source Selection

Programmable Relay Board

Key Lockout Switch

See 6.0 - Options for more information.

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Liebert POWER PROTECTION STATIC TRANSFER SWITCH manual 15.2.11RS-232 Interface Parameters, 15.2.12Maintenance Bypass