Operations and Maintenance Manual

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JANUS
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Multi-Protocol Reader 2.4 Maintenance Instructions
Confidential UM 360467-110 Revision: B Page 142 of 247
© Kapsch TrafficCom Canada Inc. 2021
All information contained herein is proprietary to, and may only be used with express, written permission from, Kapsch TrafficCom Canada Inc.
FILE: UM 360467-110 REV B3 MPR 2.4 CLEAN.DOCX 03/02/2021 1:01
Kapsch TrafficCom
Lane Controller Port Module (LPM)
The LPM provides the serial communications connections between the CTM and the LC. The LC serial
communication signals travel to/from the CTM CGC board via the Distribution Module (DSM) to the LPM serial
port connectors. The LPM provides the 8 serial port connectors and integrated lightning protection. The LPM is
field replaceable.
The MPR 2.4 is factory configured to support either an RS-232 or RS-422 interface. The data rate is configurable
to standard rates up to 115.2 kbps.
Normally, each MRFM-S channel is assigned a unique LPM COM port; however, the MRFM-S channels can be
multiplexed by assigning multiple RF channels to one LC serial port, as necessary.
For a description of the serial interface protocol and file formats exchanged between a Lane Controller and a
Reader, refer to ICD 360467-121.
Sync Port Module (SPM)
The SPM provides a pathway for synchronization signals to and from both primary and secondary CTM MC
boards via the DSM to the SPM 6-terminal block connector where the synchronization STAR network cables
connect. The SPM is field replaceable.
A 4-Wire RS422 electrical connection at the front panel terminal block connects the SPM to the synchronization
network.
There are no active components installed on the SPM.
A three-position toggle switch mounted on the SPM provides Auto, Primary and Secondary redundancy mode
control signals via the DSM to the CTM.
Controller Module (CTM)
The CTM performs the Reader’s transaction level processing for data received from and sent to the OBUs. The
CTMs may be swapped without having to save the configuration file since the configuration data is stored in the
CFMs mounted on the DSM.
The CTM as a whole unit is field replaceable.
Main Controller (MC)
The MC is an off-the-shelf EBX form-factor industrial single-board computer. This unit contains the CPU,
memory and I/Os and is used to run the Reader software.
The MC receives recovered OBU information from its associated CGC and performs a lane assignment for each
tag passing through the system via voting logic. It communicates with the LCs to report tag transactions, accepts
configuration messages, and provides status messages via a legacy LC serial interface and/or an LC Ethernet
interface. It detects and reports faults and can perform a switchover. It offers Reader configuration via a
browser interface, storage for transaction buffering, event logging, and tag transaction and performance
monitoring. It also supports remote software downloads. It provides Inter-Reader communications with up to