Schweitzer Engineering Laboratories, Inc.
SEL-3355-2 Data Sheet
5
Front- and Rear-Panel Diagrams
Figure 7
SEL-3355-2 Front Panel
Figure 8
SEL-3355-2 Rear Panel
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LAMP TEST
Button. Press and hold to test front-panel LEDs. Can be programmed to be an on/off or reset button.
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ENABLED
and
ALARM
LEDs provide operational status. A green ENABLED LED indicates normal operation. The ALARM LED
illuminates red when a nonoptimal system condition exists.
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ETHERNET
Status Indicators. Link (LNK) indicates that the port is connected, and activity (ACT) indicates when data are
being transmitted and received.
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SERIAL
Status indicators. Transmit (TX) and receive (RX) LEDs indicate activity on serial ports.
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PINHOLE
Button. Provides reset and power functions; requires a pushpin to prevent accidental use.
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HDD
Activity Indicator. Illuminates when SATAv drives are accessed.
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AUXILIARY
Status Indicators. Three programmable, bicolor LEDs for your custom application.
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USB
Ports. Two easily accessible ports to connect USB 3.1 peripherals.
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SATA
Drive Bay. Removable cover plate enables easy access to SATA drives from the front panel.
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DVI-D
. Connect digital monitors by using native DVI or an HDMI adapter.
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ETH1
and
ETH2
. Onboard independent Gigabit Ethernet interfaces.
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USB
Ports. Connect as many as four USB 3.1 peripherals at the rear panel.
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AUDIO
Ports. Line Input (blue), Line Output (green), and Microphone Input (pink).
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COM1
and
COM2
. Standard EIA-232 serial ports with config5 Vdc power on Pin 1.
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DISPLAYPORT
. Connect new digital monitors supporting the DisplayPort interface.
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ALARM
. The Form C alarm contact output can be wired either normally closed or normally open.
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PCI
Expansion Slots. Install SEL or third-party PCI or PCI Express expansion cards for additional network, serial, or other
application-specific I/O.
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Earth Ground
Terminal Screw. The earth ground connection for the SEL-3355-2.
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POWER
Supply Modules. The rated input voltage is clearly marked on the chassis near the terminals.
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