
INTRODUCTION
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1-8
SIG-00-07-11 SEPTEMBER 2012 (REVISED OCTOBER 2019)
Version No.: B.2
Item
No. on
Fig. 1-3
PHYSICAL
DESCRIPTION
FRONT-PANEL
NOMENCLATURE
FUNCTION
11
USB Interface
USB
USB 2.0 interface. Used to connect to a USB
flash drive. The VIU can store logs and reports
on the flash drive and receive software
updates from the flash drive. The 3 LEDs (red,
yellow, and green) adjacent to the USB port
indicate the following:
Green on steady
= USB drive is inserted and
it is safe to remove the USB drive.
Yellow flashing
= file transfer in progress, do
not remove USB drive.
Red flashing
= USB drive read or write error
detected.
12
Serial Interface
Laptop
(Serial)
Female RS-232 diagnostic serial port used to
connect to a PC using a standard RS-232
cable. Use this port when running PC-based
DT software or HyperTerminal to access the
VIU.
13
Serial Interface
Serial
Dedicated male RS-232 asynchronous serial
port used as a general purpose
communications port.
14
RJ-45
Ethernet Interface
Ethernet
Port 1
Standard 10/100 Base-T Ethernet port.
15
RJ-45
Ethernet Interface
Ethernet
Port 2
Standard 10/100 Base-T Ethernet port.
16
Serial Interface
GPS Port
Dedicated serial port for GPS signal output.
17
SMA Connector
GPS
Antenna
Female SMA connector (1/4-36 UNS threaded
coupling) for GPS antenna interface.
18
RJ-45
Ethernet Interface
ESSR Only
(Port 2)
Dedicated 10/100 Base-T Ethernet port. Use to
interface with a Siemens Mobility, Inc Ethernet
Spread Spectrum Radio (ESSR) only. Provides
radio power as well as Ethernet connectivity.
19 Power / ECD Connection
Two terminal power connector with External
Configuration Device (ECD) attached. Allows
VIU to be swapped out without reconfiguration.
VIU configuration is stored in the ECD.
20
Discrete Vital I/O
Vital I/O connectors. Provide 5 pairs of
terminals (+ and -) per connector.