Operations and Maintenance Manual

_
JANUS
®
Multi-Protocol Reader Ver. 2: Maintenance Instructions
Confidential UM 360463-202: A12 (Draft) Page 145 of 291
© Kapsch TrafficCom Canada Inc. 2013
These drawings and specifications contain confidential and proprietary information and are the property of Kapsch TrafficCom Canada Inc. and are issued in strict
confidence and will be kept confidential and used solely for the purpose intended and for no other purpose and shall not be transmitted, reproduced, copied, and/or
used as the basis for manufacture or sale of apparatus unless otherwise agreed to in writing by Kapsch TrafficCom Canada Inc.
FILE: MPR2_OPERATIONS_AND_MAINTENANCE-MANUAL_REV A12.DOCX 05/08/2014 11:24
Kapsch TrafficCom
The system integrator supplies the earth ground system for the Reader mains power as per the IEEE
142-2007 standard, particularly; chapter 5: Sensitive Electronic Equipment Grounding; and chapter 3
pertaining to lightning protection; and all other chapter sections describing bonding applications.
The system integrator is responsible for ensuring the grounding and power conforms to local regulatory
and safety requirements. The recommendations herein are those to ensure bad grounding does not
degrade the reader performance.
In accordance with IEEE 142-2007 all of the following building/site elements (if available) must be
bonded together:
 metal frame of the building (if effectively grounded)
 metal underground water pipe
 ground ring, concrete encased electrode
The Reader ground bar (supplied by the system integrator) is bonded to the above-mentioned
elements. If none of these elements are available on site, only then a grounding electrode is installed
as per NEC to which the Reader ground bar is bonded. The Reader components ground wires are then
connected to the ground bar clamps as shown in Figure 5-1.
Lightning arrestors should be installed on the interfaces where lightning induced surges can occur.
Note: The toll plaza installation may not have a NEMA 4 enclosure. The earth ground system and all
other ground connections to Reader components at the toll plaza are identical to those shown in the
figure below.
Figure 5-1: Earth Ground System (with recommended lightning protectors shown)
Lightning protectors
Note: It is the system integrator’s responsibility to determine the necessity of installing lightning/surge
protection equipment between the data inputs and the earth ground system at the Lane Controller (LC).
EIA 19 in.
rack
Ground bar and clamp(s) are bonded to building/site
elements (if available) as per IEEE 142-2007, otherwise
the ground bar and clamp(s) are bonded to a grounding
electrode installed as per NEC.
AC Mains
(to PSMs and
ESMs)
AWG 10
AWG 8
Reader
Chassis
ground strap braid wire
RF
feedline
Lightning Protectors
LC data
cables
Sync
circuit
Reader enclosure
(NEMA 4)