Serial-To-Ethernet Converter
Wayside Signaling
Systems
Ansaldo STS USA
(Formerly known as Union Switch & Signal)
RSE-1D9
Rev. 3-09
Serial-To-Ethernet Converter
(MicroLok® II Applications)
The MicroLok II Serial-To-Ethernet Converter (SEC) is a
highly useful device for upgrading existing MicroLok II
serial communications networks. It allows a MicroLok II
unit to be connected to an internal or external network
utilizing the MicroLok II Peer protocol to communicate
vital and non-vital messages. As such, the device
enables routing of MicroLok II Peer messages using
TCP and UDP network protocols.
Alternately, it converts Ethernet signals to serial data
for use by a MicroLok II unit. MicroLok II serial data
placed on the network is also available for central office
applications, enabling MicroLok II units to communicate
with central office applications that support the Peer
protocol. Overall, the SEC can route Peer messages to
any destination that implements the Peer protocol. In
addition, the SEC supports the option of attaching the
Hash-keyed Message Authentication Code (HMAC) to
peer protocol messages.
General Description
The SEC provides Ethernet network connectivity to
MicroLok II units. This unit converts the MicroLok II Peer
messages from MicroLok II serial ports (CPU PCB) to
Ethernet data which is then available to other devices across
an Ethernet network. Functional elements of the SEC
include:
•
•
Serial protocol communication channel which translates
between MicroLok II RS-232 signals and Ethernet to
allow MicroLok II units to communicate with outside
networks using the Peer protocol.
Power source circuitry which conditions a nominal 12-volt
battery source to provide isolated power.
•
Internal web server/interface that provides screens for
configuring the SEC unit.
Using the web server/interface, each unit's operational
status and product information can be inspected. This also
allows unit configuration via the web interface and field
upgrading of firmware. Access to the user interface is
password protected.
Unit Design and Interfaces
The SEC is packaged in a plastic housing with tabs on the
back for DIN rail mounting. Connection to the battery power
source is made using a 4-pin Wago brand connector on the
front panel. This connector is supplied with the unit, but
must be wired by in the field. Power status is indicated by a
red LED on the front panel and is controlled with an On/Off
rocker switch. A 5 amp fuse, accessible from the front
panel, protects the unit from excessive current.
To order, call 1-800-652-7276
e-mail: orders@ansaldo-sts.us
The SEC provides translation for one serial communications
channel between an RS-232 line and the Ethernet. The RS232 port connection consists of a DB-9 female connector
mounted on the front panel; this port supports both RX and
TX signals. An 8-pin RJ-45 plug is provided for the unit’s
Ethernet connection. These two communication ports (serial
and Ethernet) are isolated from each other, from the system
chassis, and from system battery.
The RS-45 Ethernet port accepts any of the widely available
Category 5 (CAT5) or better cable (standard off-the-shelf
cable). An Ethernet crossover cable is required to connect
the SEC directly to a PC and a standard Ethernet cable is
used to connect the SEC to the network.
Advantages
•
•
•
•
•
•
•
•
Enables routing of MicroLok II vital and non-vital
messages using the peer-to-peer protocol;
Serial-to-peer, peer-to-serial conversions;
Permits routing of MicroLok II Peer messages using TCP
and UDP network protocols,
Suitable for peer-based central office communications;
Compatible with HMAC-to-peer protocol messages;
Meets all applicable environmental, EMI and vibration
tolerance specifications.
Built-in web interface for viewing unit status, configuring
firmware.
No maintenance required.
www.ansaldo-sts.com
RSE-1D9, p. 1
Ansaldo STS USA
Serial-To-Ethernet Converter
(MicroLok® II Applications)
(Formerly known as Union Switch & Signal)
RSE-1D9
Rev. 3-09
ETHERNET
CROSSOVER
CABLE
PC
+
POWER
SUPPLY
Specifications
Source Voltage:
Fuse (Front Panel):
Battery Connection:
Serial Port:
Ethernet Port:
Ethernet Cable:
Unit Dimensions:
Unit Weight:
Mounting
Temp. Range:
Humidity Limit:
Vibration Limit:
EMI Limit:
CPU
SERIAL-TOETHERNET
CONVERTER
SERIAL CABLE
STANDARD ETHERNET CABLE
CPU PCB
SERIAL
PORT
ETHERNET
NETWORK
MICROLOK® II
CARDFILE
-
CENTRAL OFFICE
REMOTE DIAG.
OTHER WAYSIDE CONTROLLERS
ETC.
SEC Unit Design and Dimensions
+9.8 to +16.2 Vdc
5A
4-pin Wago brand
DB-9 (female), RS-232
8-pin RJ-45 plug
Category 5 (CAT5) or better
6.77 in. (17.2 cm) H x 4.41 in
(11.2 cm) W x 1.38” (3.5 cm) D
(see figure at right)
0.74 lb. (337g)
Standard DIN Rail
-40° C to +70°C
0% to 95% non-condensing
AREMA/FRA-compliant
AREMA/FRA-compliant
Ordering and Additional Information
•
•
Refer to ordering tabulation for SEC top assembly
part number and field-replaceable parts
Request ASTS USA Service Manual SM-6800O for
additional information on the SEC.
Order No.
N16920401
J709146-1910
J071185
Converter, Connector and Fuse
Serial-To-Ethernet Converter Unit
Power Connector (4-pin WAGO connector)
Fuse, 5A
MicroLok® is a registered trademark of Ansaldo STS USA, Inc.
RSE-1D9, p. 2
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