Hitachi Microlok II, Installation, Operation And Troubleshooting Manual

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Microlok II
®
Serial-to-Ethernet Converter (SEC)
Copyright 2019 SM6800O Rev. 1, March 2019 2-1
2
1B
General Description
The Serial-to-Ethernet Converter (SEC) provides Ethernet network connectivity to Microlok II
units. The SEC converts the Microlok II Peer messages from the Microlok II serial ports to
Ethernet data which is then available to other devices across an Ethernet network. The SEC
thus enables the routing of Microlok II Peer messages using the TCP and UDP network
protocols. Conversely, the SEC 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. The SEC can route Peer messages to any destination that implements the Peer
protocol.
The SEC supports the option of attaching the Hash-keyed Message Authentication Code
(HMAC) to peer protocol messages.
The SEC functionally consists of the following:
• A 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
Peer protocol.
• Power source circuitry which conditions a nominal 12-volt battery source to provide
isolated power.
• An internal web server/interface that provides screens for configuring the SEC unit.
The SEC has a built-in web interface. Using this interface, you can inspect each unit's
operational status and product information. You can also configure the unit through the web
interface and even upgrade its firmware in the field. Access to the user interface is password
protected. (See Sections
X
3.7
X
and
X
3.8
X
.)
The SEC is packaged in a plastic box with tabs on the back for DIN rail mounting (
X
Figure 1-1
X
).
The SEC requires a source voltage in the range of 9.8 to 16.2 VDC. The unit connects to the
battery power source using a four-pin WAGO connector (J7091461910) on the front panel. This
connector is supplied with the unit but must be wired by the user (Section
X
3.1
X
). Power is
indicated by a red LED on the front panel and is controlled with an On/Off rocker switch. A five-
amp fuse (J071185), accessible from the front panel, protects the unit from excessive current.
Figure 2-1
X
shows the front panel of the SEC.
The SEC provides translation for one serial communications channel between RS-232 and
Ethernet. The RS-232 port connection is a DB-9 female connector mounted on the front panel
(Serial Connection on
X
Figure 2-1
X
). This port supports both RX and TX signals.
The SEC Ethernet Connection uses an RJ45 connector. These two communication ports
(Serial Connection and Ethernet Connection) are isolated from each other, from the system
chassis, and from the system battery.
X