Schweitzer Engineering Laboratories, Inc.
SEL-3355-2 Data Sheet
3
Functional Overview
Figure 1
Functional Diagram in Utility Substation Applications
Watchdog Functionality
An embedded controller provides an extra level of auto-
mation controller system reliability. One function of the
embedded controller is to restart the automation control-
ler if there is an operating system problem or a problem
with specific software services running on the operating
system.
SEL System Monitor
SEL System Monitor software monitors system perfor-
mance and component health. Alerts for alarm condi-
tions are issued on configurable thresholds. Example
thresholds include CPU usage, free disk space, and avail-
able system memory.
Ethernet
Ethernet connections allow the SEL-3355-2 to connect to
as many as ten separate, high-speed Ethernet networks
via two built-in gigabit Ethernet ports, plus eight addi-
tional ports by using two SEL-3390E4 PCIe network
interface cards. Aggregate several ports for increased
performance or redundancy or separate local area net-
works (LANs) for control, data, or engineering access.
Time
The SEL-3390S8 serial expansion card accepts IRIG-B
time-code input for precise time input and distribution to
connected devices.
EIA-232/EIA-485/EIA-422 Ports
The SEL-3355-2 automation controller platform comes
standard with two built-in EIA-232 DB-9 ports and,
optionally, as many as 24 rear-panel EIA-232/422/485
ports with RJ45 format connectors by using the
SEL-3390S8 PCIe serial expansion card. Serial expan-
sion communications ports are software selectable to
function as standard EIA-232/422/485 ports with +5 V
power.
Alarm Output
An alarm contact output on the rear panel can be used to
signal internal errors and operating system malfunctions.
Programmable LEDs
Program three front-panel bicolor LEDs for use with
your custom applications.
Out-of-Band Management
Intel vPro Active Management Technology (AMT) pro-
vides out-of-band management for security, configura-
tion, and monitoring.
SEL Ethernet Switch
Scale or
Other Smart Device
PLC, PAC, or
Other Smart Device
SEL-3355
SEL Motor
Protection
Relay
SEL-710
SEL Programmable
Automation
Controller (PAC)
SEL-2411
SEL-2725
Batch System
Controls or
Other IED
IED
SCADA
SEL Protection, Automation,
and Control System
SEL-451