Interface Parameters; Maintenance Bypass; Fuseless Design; Options - Liebert POWER PROTECTION STATIC TRANSFER SWITCH User Manual

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
Interface
Baud Rate
Parity
Number of Data Bits
Number of Stop Bits
Hardware Flow Control
Terminator
Handshaking
Structure
Local Echo

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
Redundant Output Breaker
Distribution Cabinet With I-Line Panelboard
Input Junction Boxes and Cable
Comms Board w/SiteScan and Modem Interface
Input Contact Isolator Board
Programmable Relay Board
See 6.0 - Options for more information.
Setting
RS-232 Using EIA Voltage Levels
9600
None
8
1
Off
<CR> <LF>
Not supported
Full duplex
Off
LED Display
Network Interface Card (NIC)
Seismic Floor Stand - 18", 24", 30" and 36"
Export Crating
Internal Modem
Remote Source Selection
Key Lockout Switch
115
Specifications