
INSTALLATION
_________________________________________________________________________________________________________
2-9
SIG-00-07-11 SEPTEMBER 2012 (REVISED OCTOBER 2019)
Version No.: B.2
PORT
LOCATION
NOMENCLATURE
INTENDED USE
LED INDICATIONS
Top Panel
Ethernet
Port 2
Use for communication between
VIU and other Ethernet equipped
devices such as other VIU units.
NOTE
This port is in parallel with
ESSR
only (Port 2)
. Do not use both
ports simultaneously.
n/a
Top Panel
ESSR Only
(Port 2)
Special Ethernet port. Use for
connection to Siemens Ethernet
Spread Spectrum Radio (53325)
only. This port also provides power
to the radio.
NOTE
This port is in parallel with
Ethernet Port 2
. Do not use both
ports simultaneously.
n/a
Table 2-4 Special ESSR Ethernet Port Connector Pin-outs (RJ45)
Pin No.
Signal Name
Abbr.
Signal Description
1
Ethernet TX
Tx (+)
Radio to Ethernet (Transmit data +)
2
Ethernet TX
Tx (-)
Radio to Ethernet (Transmit data -)
3
Ethernet RX
Rx (+)
Ethernet to Radio (Receive data +)
4
VDC
DCV (+)
Power to Radio
5
VDC
DCV (+)
Power to Radio
6
Ethernet RX
Rx (-)
Ethernet to Radio (Receive data -)
7
Ground
GND (-)
Power ground to Radio
8
Ground
GND (-)
Power ground to Radio
2.1.8 GPS Port
The GPS port is a female DB9 connector that provides the 1 pulse per second (pps) GPS signal
output from the VIU. It also provides a NMEA 0183 output from the internal GPS receiver. This
port is designed to connect to a CBTC Wayside Communications Module (WCM) {not to be
confused with Siemens WCM, A53447} providing an accurate time source for broadcasting of
wayside status messages. Refer to Table 2-5 for connector pin outs.