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15.2.11 RS-232 Interface Parameters
The service terminal interface parameters are the following settings and cannot be changed.
Table 25
RS-232 Settings
Parameter
Interface
Baud Rate
Parity
Number of Data Bits
Number of Stop Bits
Hardware Flow Control
Terminator
Handshaking
Structure
Local Echo
15.2.12 Maintenance Bypass
The 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 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 mainte-
nance bypass.
See 10.4 - Maintenance Bypass on page 61 for instructions using the Color LCD Graphical Dis-
play unit and 14.2.3 - Maintenance Bypass on page 104 for instructions using the LED units.
15.2.13 Fuseless Design
All 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 STS2:
• Redundant Output Breaker
• Input Junction Boxes and Cable
• Comms Board w/SiteScan and Modem Interface
• Input Contact Isolator Board
• Programmable Relay Board
• Network Interface Card (NIC)
See 6.0 - Options on page 18 for more information.
112
Specifications
Setting
RS-232 Using EIA Voltage Levels
9600
None
8
1
Off
<CR> <LF>
Not supported
Full duplex
Off
• Seismic Floor Stand
• Export Crating
• Internal Modem
• Remote Source Selection
• Key Lockout Switch
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