Wavetronix, SmartSensor, Click, Command, and all associated product names and logos are trademarks of Wavetronix LLC. All other
products or brand names as they appear are trademarks or registered trademarks of their respective holders.
Protected by US Patent Nos. 6,556,916; 6,693,557; 7,426,450; 7,427,930; 7,573,400; 7,889,097; 7,889,098; 7,924,170; 7,991,542;
8,248,272; 8,665,113; Canadian Patent Nos. 2461411; 2434756; 2512689; and European Patent Nos. 1435036; 1438702; 1611458. Other
US and international patents pending.
e Company shall not be liable for any errors contained herein or for any damages arising out of or related to this document or the
information contained therein, even if the Company has been advised of the possibility of such damages.
is document is intended for informational and instructional purposes only. e Company reserves the right to make changes in the
specications and other information contained in this document without prior notication.
FCC Part 15 Compliance: e Wavetronix SmartSensor sensors comply with Part 15 of the Federal Communications Commission
(FCC) rules which state that operation is subject to the following two conditions: (1) this device may not cause harmful interference,
and (2) this device must accept any interference received, including interference that may cause undesirable operation. FCC compliance statements for applicable optional modules are to be found in the module specications. Unauthorized changes or modications
not expressly approved by the party responsible for compliance with the FCC rules could void the user’s authority to operate this
equipment.
Disclaimer: e advertised detection accuracy of the Wavetronix SmartSensor sensors is based on both external and internal testing,
as outlined in each product’s specication document. Although our sensors are very accurate by industry standards, like all other sensor manufacturers we cannot guarantee perfection or assure that no errors will ever occur in any particular applications of our technology. erefore, beyond the express Limited Warranty that accompanies each sensor sold by the company, we oer no additional
representations, warranties, guarantees or remedies to our customers. It is recommended that purchasers and integrators evaluate the
accuracy of each sensor to determine the acceptable margin of error for each application within their particular system(s).
WX-500-0052
10/2012
Contents
Introduction 5
SmartSensor Advance Package 6 • Selecting a Detection
Method 6 • Selecting a Mounting Location 7
Part I Installing the SmartSensor Advance
Chapter 1 Installing the SmartSensor Advance 15
Selecting the Mounting Height 15 • Mounting the Sensor 16
• Aligning the Sensor 19 • Applying Silicon Dielectric Compound 24 • Connecting the SmartSensor 6-conductor Cable
24 • Grounding the Sensor 25
Chapter 2 Connecting Power and Surge Protection 27
Mounting the Backplate 28 • Connecting AC Power 28 • Providing System Surge Protection 32 • Terminating the 6-conductor Cables 34 • Contact Closure Connections 36
Appendix A – Cable Connector Denitions 137 • Appendix
B – Cable Lengths 139 • Appendix C – Direct Serial Connections 142 • Appendix D – Target Roll Angles for Alignment
143 • Appendix E – Command Line Arguments 145
Introduction
In this chapter
SmartSensor Advance Package
Selecting a Detection Method
Selecting a Mounting Location
e Wavetronix SmartSensor Advance™ and Wavetronix SmartSensor Advance Extended
Range detect and continuously monitor the progression of moving trac out to a maximum range of 600 . (182.9 m) and 900 . (274.3 m) respectively.
Both trac sensors are designed for use on the approaches to signalized intersections. ey
are used to alert the trac controller of a vehicle’s arrival based upon the incoming range,
speed, and estimated time-of-arrival of each detected vehicle for applications such as highspeed dilemma zone protection and queue reduction. In addition, SmartSensor Advance
Extended Range allows you to prioritize dilemma zone protection based upon the discovery range of trucks and passenger cars.
SmartSensor Advance and SmartSensor Advance Extended Range monitor vehicle trac
ow through the use of a 10.525 GHz (X band) operating radio frequency. Both sensors
utilize Digital Wave Radar™ technology to provide a reliable Frequency Modulated Continuous Wave. SmartSensor Advance Extended Range uses a new form of frequency modulation to achieve its extended reach.
e SmartSensor Advance User Guide is divided into two parts. Part one provides a step-by-
step process for installing the SmartSensor Advance and the SmartSensor Advance Extended Range, including mounting and alignment guidelines. Part two provides instructions for
installing and using the SmartSensor Manager Advance soware, including instructions for
both automatic and manual sensor congurations. Any questions about the information in
this guide should be directed to Wavetronix or your distributor.
6 INTRODUCTION SMARTSENSOR ADVANCE USER GUIDE
Caution
Do not attempt to service or repair this unit. This unit does not contain any components and/or parts serviceable in the field. Any attempt to open this unit, except
as expressly written and directed by Wavetronix, will void the customer warranty.
Wavetronix is not liable for any bodily harm or damage caused if service is attempted
or if the back cover of the SmartSensor unit is opened. Refer all service questions to
Wavetronix or an authorized distributor.
SmartSensor Advance Package
A typical SmartSensor Advance package will commonly include:
Check the packing slip for actual contents. If any of these items are missing, note the serial
number located on the back of the sensor and contact your distributor.
Selecting a Detection Method
Consult the Wavetronix guidelines for integration of SmartSensor Advance into your trac
control system. For dilemma zone protection applications, integration guidelines can be
found on the Wavetronix website and Wavetronix application notes. Contact your dealer or
a Wavetronix Technical Services representative if the application-specic documentation
does not fully answer your system integration and conguration questions.
Some examples of trac control applications include:
Dilemma zone protection using green extension Truck signal priority using green extension Dilemma zone protection using green extension with an Advanced Warning Sign
(AWS)
Trac signal performance measures Queue clearance Ecient green extension Queue management
INTRODUCTION SMARTSENSOR ADVANCE USER GUIDE 7
Note
For queue management the SmartSensor Advance Extended Range is recommended
because it allows you to see a greater range and also provides a view of the stop
bar. The SmartSensor Advance Extended Range is also recommended for wrong-way
detection applications. Contact Wavetronix Technical Services for more information.
If your application is dilemma zone protection and/or truck signal priority, SafeArrival™
technology is recommended because it provides signicant safety and eciency advantages when compared with traditional point-based protection. Conguring SafeArrival
technology for dilemma zone protection is as simple as selecting the arrival times, ranges
and speeds that are unsafe and warrant protection. Conguration SafeArrival technology
for truck signal priority requires the additional conguration of the truck discovery range
threshold available with SmartSensor Advance Extended Range.
For green extension, arrival times between 2.5 and 5.5 seconds, ranges from 100 to 500 .
(30.5 to 152.4 m) and speeds above 35 mph (56 kph) are generally considered unsafe for
passenger vehicles. For truck signal priority, arrival times between 2.5 and 7.5 seconds,
ranges from 100 to 900 . (30.5 to 274.3 m) and speeds above 35 mph (56 kph) are generally
considered unsafe for trucks, buses and other large vehicles.
However, engineering judgment needs to be used in selecting these parameters. For example, 2.5 to 5.5 second arrival times are nominal values based upon general 10% and 90%
stopping probabilities. Your agency may suggest protection of slightly dierent arrival times
for a particular type of high-speed approach.
It may be helpful to consult your agency’s guidelines to verify which trac conditions warrant protection at your intersections. Location of point-detection zones, passage time and
design speed can oen be used to discover the arrival times and ranges that warrant protection. In addition, the minimum speed that would warrant installation of a dilemma zone
protection system may be used as a guideline for the lowest speed to be protected.
If you elect not to use SafeArrival technology, you can also congure SmartSensor Advance
to match your agency’s loop-based dilemma zone protection guidelines. Before doing so, it
is recommended that you explore the benets provided by SafeArrival technology in detail.
Selecting a Mounting Location
Consider the following guidelines when selecting a mounting location:
Detection coverage – Position the sensor so that it will be able to reach all the speci-
ed advanced detection zones. Also consider that the sensor will track vehicles as they
enter and exit desired detection zones. Accordingly, the sensor will oen work better if
8 INTRODUCTION SMARTSENSOR ADVANCE USER GUIDE
➋
you position detection coverage to track vehicles for several feet before they reach the
rst zone. e closest detection zone provided by SmartSensor Advance and Smart-
Sensor Advance Extended Range is 50 . (15.2 m) from the location of the sensor. e
farthest detection zone provided by SmartSensor Advance Extended Range is 900 .
(274.3 m). e farthest detection zone provided by SmartSensor Advance is 600 .
(182.9 m). e sensor is usually used to detect incoming trac, but it can detect in-
coming or outgoing trac, and it lters out the opposite direction trac. With Smart-
Sensor Advance Extended Range, incoming large vehicles are typically discovered by
about 750 . (228.6 m) and small vehicles are typically discovered about 600 (182.9
m) from the sensor. With SmartSensor Advance, most incoming large vehicles are dis-
covered by about 500 . (152.4 m) and most small vehicles are discovered about 400
(121.9) from the sensor.
➌
➍
➊
Figure I.1 – Mounting Locations
Line-of-sight – Position the sensor so that it will have line-of-sight to the entire detec-
tion area of interest. Avoid structural occlusion including trees, signs and other road-
side structures.
Closest roadside – If you install the sensor on the side of the road (instead of over-
head), select the location closest to the lanes of interest. is will prevent departing
trac from occluding approaching detections.
Through-Movement Detection – If only through-movement detection is desired, po-
sition the sensor to avoid detection of turn-only lanes. Consider using speed lters to
remove the impact of turning vehicles.
Mounting Height – Mounting the sensor as high as possible is recommended to reduce
same lane occlusion. A maximum of 40 . (12.2 m) and minimum of 17 . (5.2 m) is
recommended. If the sensor is higher than 30 . (9.1 m), the oset should be less than
50 . (15.2 m) to increase accuracy.
INTRODUCTION SMARTSENSOR ADVANCE USER GUIDE 9
Mounting Oset – Mounting the sensor closer to the lanes of interest will usually in-
crease detection accuracies. A maximum oset of 50 . (152.4 m) is recommended, but
the sensor will still reliably track vehicles at further osets. Mounting with a smaller
oset will generally increase line-of-sight.
Cable Length – Make sure that you have sucient homerun and sensor cabling. With
the newer models, cable runs as long as 1500 . (457.2 m) are achievable using 24 VDC
operation and RS-485 communications. Older models supported up to 600 . (182.9
m). Consult Appendix B for more information.
Suspended Electrical Cables –e sensor is designed to work in the presence of
suspended power lines and other electrical cabling, however these cables should be
mounted at least ten feet away from the front of the sensor.
Neighboring Structures and Parallel Walls – For best performance, it is preferred that
the sensor be mounted without signs or other at surfaces mounted directly behind it.
is will help reduce multiple reection paths from a single vehicle.
e SmartSensor Advance should be mounted using one of the following options (see Figure I.1):
1 On a vertical pole – e preferred mounting location for the SmartSensor Advance or
SmartSensor Advance Extended Range is oen a vertical pole near the stop bar. Vertical poles are typically installed on the roadside of the approach near the stop bar to
support a mast arm, span wire or luminaire. ese poles oen extend as high as 30 .
(9.1 m) or more, allowing the sensor to be mounted high enough to reduce occlusion.
is mounting location is typically very safe for installation.
2 On a luminaire – is mounting location will oen reduce the oset and increase the
mounting height (a maximum of 40 . (12.2 m) is recommended). Make sure the luminaire can support the load of the sensor. is mounting location is typically very safe
for installation.
3 The backside of the opposing mast arm – By mounting on the backside of the mast
arm, opposite the signal heads for the opposing direction of travel, the sensor can be
placed near the lanes of interest. e minimum mounting height is 17 . (5.2 m), but
higher mounting is recommended to minimize occlusion. When appropriate, a vertical
extension can be used; the extension should have the ability to freely rotate the sensor
for alignment. e sensor should be mounted as far out on the mast arm as possible to
avoid potential occlusion issues with stopped vehicles in a le-turn pocket.
4 The front side of the mast arm – e sensor can be installed on the mast arm with
the signals for the approach of interest. SmartSensor Advance Extended Range is recommended at this mounting location, because typically 100 feet or more of the sensor’s range is used to cross the width of the intersection. For SmartSensor Advance
Extended Range, the eective maximum range of the sensor is still as high as 800 feet
from the stop bar at this mounting location. is mounting location can be helpful if
the minimum green time is so short that vehicles in the queue clearance zone do not
start moving before the minimum green timer expires.
e SmartSensor Advance or SmartSensor Advance Extended Range can also be mounted
at the back of the dilemma zone on an existing luminaire or custom pole if the luminaire
10 INTRODUCTION SMARTSENSOR ADVANCE USER GUIDE
already exists, power is available and a wireless communication link can be used to avoid
trenching. Wavetronix has integrated wireless solutions readily available for this type of
installation.
Part 1
Installing the SmartSensor
Advance
Chapter 1 – Installing the SmartSensor Advance
Chapter 2 – Connecting Power and Surge Protection
Installing the SmartSensor Advance1
In this chapter
Selecting the Mounting Height
Attaching the Mount Bracket to the Pole
Attaching the Sensor to the Mount Bracket
Aligning the Sensor to the Roadway
Applying Silicon Dielectric Compound
Connecting the SmartSensor Cable to the Sensor
1
Installing the SmartSensor Advance is quick and easy. Once installed, SmartSensor Advance requires little or no on-site maintenance. is chapter describes the installation process, including how to attach the sensor to the pole and how to correctly align the sensor.
Warning
Caution should be used when installing any sensor on or around active roadways.
Serious injury can result when installation is performed using methods that are not
in accordance with authorized local safety policy and procedures. Always maintain an
appropriate awareness of the trac conditions and safety procedures as they relate
to specific locations and installations.
Selecting the Mounting Height
Select a mounting location within the recommended range of osets from the center of the
16 CHAPTER 1 INSTALLING THE SMARTSENSOR ADVANCE
lanes of interest. Use Table 1.1 to determine the mounting height based on the oset. Osets
of less than 50 . (15.2 m) on either side of the center of the desired lanes are recommended.
e minimum recommended mounting height is 17 . (5.2 m) and the maximum recommended mounting height is 40 . (12.2 m). Higher than 30-. (9.1-m) mounting heights
are acceptable if the sensor is within 50 . (15.2 m) of the road. Depending on the site and
type of trac, some vehicles may be momentarily occluded by other vehicles. Vehicle-based
occlusion favors detection of large vehicles, which may be acceptable for dilemma zone
protection applications. It may be necessary to increase the height of the sensor to reduce
occlusion, or use controller passage time to bridge the gap caused by occlusion.
Mounting the Sensor
e standard sensor mount has three axes of rotation: straps around pole, vertical swivel
points and horizontal swivel points. During the mounting process, keep the bolt nuts on the
mount loose. Your sensor mount’s degrees of freedom should be adjustable until you have
completed your alignment.
Attaching the Mount Bracket to the Pole
e sensor is mounted to the pole using a mount bracket (see Figure 1.1).
CHAPTER 1 INSTALLING THE SMARTSENSOR ADVANCE 17
Main Shaft
Mount Head
Figure 1.1 – Mount Bracket
Before attaching the mount bracket to the pole, rst make sure that your cables are long
enough to support the sensor height and the distance from the sensor to the cabinet.
Follow the steps below to correctly attach the mount to the pole (see Figure 1.2):
1 Insert the stainless steel straps through the slots in the mount bracket.
2 Position the mount so that it facilitates visual line-of-sight from the sensor to the tar-
get. You will need to have sucient headroom behind the sensor to position your eye
behind the viewnder alignment tool (the next section will go into detail about the
viewnder alignment tool).
For a roadside installation (on a vertical pole) the mount's main sha can be positioned
slightly ahead of perpendicular to the roadway; you can then look from the side of
the pole. For an overhead installation (on a mast arm) the mount's main sha can be
positioned slightly above horizontal; you can then look over the pole (see Figure 1.2).
Line-of-sight to target
Height
Target
Distance
Oset (perpendicular)
Figure 1.2 – Pointing the Sensor
3 Tighten the strap screws (see Figure 1.3).
X
18 CHAPTER 1 INSTALLING THE SMARTSENSOR ADVANCE
Figure 1.3 – Attaching the Mount Bracket to the Pole
4 Using the swivel joints (see Figure 1.4), pan and tilt the mount so that the mount head
points roughly to target distance in the center of the lanes of interest. (e viewnder
will be used later to help you achieve a more precise alignment.)
If the sensor is on a vertical pole, rst use swivel joint 1 to pan, then use swivel joint 2
to tilt. If the sensor is on a horizontal pole, rst use swivel joint 1 to tilt then use swivel
joint 2 to pan.
1
2
Figure 1.4 – Swivel Joints
Attaching the Sensor to the Mount Bracket
1 Align the bolts on the sensor’s backplate with the holes in the mount bracket. e 8-pin
connector on the sensor should be pointing towards the ground.
2 Place the lock washers onto the bolts aer the bolts are in the mount bracket holes.
3 read on the nuts and tighten (see Figure 1.5).
Figure 1.5 – Attaching the Sensor to the Mount Bracket
CHAPTER 1 INSTALLING THE SMARTSENSOR ADVANCE 19
Aligning the Sensor
In most applications, the goal is to position the beam’s elliptical footprint along the roadway.
is is done by pointing the hot spot of the sensor’s beam (middle of the sensor) at a target
location, then rolling the sensor so that the beam’s footprint lines up with the road. Aer
the basic alignment achieved during the mounting process, the viewnder is used to rene
the alignment.
About the Viewfinder
e viewnder is a tool that helps you point the sensor at the target location and align the
sensor with the roadway (see Figure 1.6). It is designed with sighting features and visual
cues to facilitate proper alignment (these features and cues will be introduced from the
vantage point of an installer in a bucket truck).
Figure 1.6 – Viewfinder
e viewnder has two main sighting features:
1 Target crossbars (top and bottom)
2 e long, narrow alignment bar
When the sensor is properly pointed at the target, the target will line up between the two
notches in the target crossbars, as shown in Figure 1.7.
Figure 1.7 – Target
20 CHAPTER 1 INSTALLING THE SMARTSENSOR ADVANCE
When the sensor is properly aligned with the roadway, the long, narrow alignment bar will
line up with the center of the lanes of interest (see Figure 1.8).
Figure 1.8 – Long, Narrow Bar Lines Up with Center of Lanes of Interest
In addition to having two main sighting features, the viewnder is used from two dierent
viewpoints:
Viewpoint 1 – Position your eye squarely behind the sensor. It is used to point the sen-
sor at the target and to align the sensor to the roadway.
e viewnder has visual cues to help you achieve viewpoint 1: the two bottom side
tabs will line up between the target crossbars, and the bottom section of the long, nar-
row alignment bar will line up within the large notch (see Figure 1.9).
Figure 1.9 – Viewpoint 1
Viewpoint 2 – is viewpoint is used to verify alignment down the center of the lanes
of interest. It allows you to view the upstream detection area of the sensor.
Viewpoint 2 is achieved by moving your eye down and in toward the viewnder so that
the archway framed by the crossbar and the archway framed by the tabs are concentric
and the two top tabs match up with the top crossbar (see Figure #).
CHAPTER 1 INSTALLING THE SMARTSENSOR ADVANCE 21
Figure 1.10 – Viewpoint 2
Using the Viewfinder
With the sensor pointed roughly at the target location, follow these steps to rene the alignment:
1 Attach the viewnder by centering the arched notch over the top-middle of the sensor
and inserting it securely into position (see Figure 1.11).
Figure 1.11 – Attach Viewfinder
2 With your eyes about one foot from the viewnder, look directly through the target
crossbars (viewpoint 1). Tilt the sensor until the space between the target crossbars is
at the level of the target location (see Figure 1.12).
22 CHAPTER 1 INSTALLING THE SMARTSENSOR ADVANCE
To target
location
Figure 1.12 – Viewpoint 1
3 Pan the sensor until the target location is centered between the notches in the target
crossbars. e target location should now be centered in the target sights.
Figure 1.13 – Target Location Centered in Target Sights
Note
For a better view, close one eye and move closer to the viewfinder.
If there is not enough headroom to look through the viewfinder, you can use a digital
camera directly behind the viewfinder window for visual verification.
4 Roll the sensor until the long narrow bar is parallel with the center of the lanes of inter-
est on the roadway. Vehicle paths should be parallel to the long narrow bar (see Figure
1.14).
CHAPTER 1 INSTALLING THE SMARTSENSOR ADVANCE 23
Figure 1.14 – Vehicle Paths Parallel to Long, Narrow Bar
5 Use viewpoint 2 to verify your alignment. Do this by moving your head down so that
you can see the top crossbar and the archway (see Figure 1.15).
To top of
detection area
Figure 1.15 – Viewpoint 2
Make sure the archways overlap and the top tabs line up with the top crossbar (see
Figure 1.16).
Figure 1.16 – Overlapping Archways
Vehicle paths should still be parallel to the long, narrow bar. If everything lines up,
move on to step 6. If not, your alignment is o and you need to repeat steps 2–4.
24 CHAPTER 1 INSTALLING THE SMARTSENSOR ADVANCE
6 Tighten down the pan and tilt bolts, then tighten down the four bolts on the backplate.
If you are using the sensor on a curved road, you can aim the sensor so that it bisects the
curve of the road and still hits your nearest and farthest ranges of interest. If the sensor is
mounted near the outside edge of the curved road, you may be able to bisect the curve with
little or no roll. If the road curves dramatically, you may need to reduce the down tilt of the
sensor so that the beam fans out more at the far ranges.
Applying Silicon Dielectric Compound
1 Tear the tab o the tube of silicon dielectric compound.
2 Squeeze about 25% of the silicon into the connector at the base of the SmartSensor
Advance (see Figure 1.17).
3 Wipe o any excess compound.
Figure 1.17 – Connector Receptacle (left) and Grounding Lug (right)
Connecting the SmartSensor 6-conductor Cable
e next step is to plug the SmartSensor 6-conductor cable into the connector. e sensor
connector is keyed to ensure proper connection (see Figure 1.18); simply twist the plug end
of the connector clockwise until you hear it click into place.
Figure 1.18 – Sensor 6-conductor Cable Connector
CHAPTER 1 INSTALLING THE SMARTSENSOR ADVANCE 25
To avoid undue movement from the wind, strap the 6-conductor cable to the pole or run it
through a conduit, but leave a small amount of slack at the top of the cable to reduce cable
strain. Route the cable from the sensor location back to the main trac cabinet.
To set up your network in an orderly fashion, it is recommended that labeling be used
on the service end of each SmartSensor 6-conductor cable. A convenient way to label the
cables is to mark the last seven digits of the serial number on each sensor and the direction
of trac monitored (see Figure 1.19).
Figure 1.19 – Service End Labeling
Grounding the Sensor
e SmartSensor Advance must now be grounded:
1 Connect a grounding wire to the grounding lug on the bottom of the sensor (see Figure
1.17).
2 Connect the other end of the grounding wire to the earth ground for the pole that the
sensor is mounted on. Do not attempt to run the grounding wire back to the main
trac cabinet.
Connecting Power and
Surge Protection2
In this chapter
Mounting the Backplate
Connecting AC Power
Providing System Surge Protection
Terminating the SmartSensor 6-conductor Cable
Contact Closure Connections
2
Aer installation, each SmartSensor Advance will need to be integrated into the main trafc cabinet for power and surge protection. is chapter contains information on how to
provide power and surge protection to the intersection preassembled backplate located in
the main trac cabinet.
e intersection preassembled backplate is 11 in. (28 cm) wide and 11.5 in. (29.2 cm) high.
Also available to use are the intersection preassembled 19-inch rack for server racks and the
intersection segmented preassembled backplate for easier installation in trac cabinets. All
wiring on the rack and backplates is done using stranded wires with wire ferrules for screw
terminal connections (see Figure 2.1).
28 CHAPTER 2 CONNECTING POWER AND SURGE PROTECTION
Figure 2.1 – Intersection Preassembled Backplate
Please refer to the Click quick-reference guides for more comprehensive product instructions. Chapter 12 contains information on how Click products make the sensor compatible
with all standard control cabinets.
A pinout diagram showing the sensor cable’s pin-out and appropriate connection points
can be found in Appendix A of this document.
Mounting the Backplate
Use the following steps to mount the backplate in the trac cabinet:
1 Locate the area planned for mounting the backplate. e backplate can usually be
mounted on the side panel of a NEMA-style cabinet.
2 Attach the backplate with the U-channel mounting screws.
Note
If you have a 330 series (170/2070 style cabinet) with a 19-inch EIA rack, please con-
tact Wavetronix Technical Services for assistance. Wavetronix can provide modified
backplates that attach to a 19-inch rack.
Connecting AC Power
Since SmartSensor Advance operates on 10–28 VDC, the intersection preassembled backplates provide an AC power conversion option. e backplate includes an AC to DC power
converter, power surge and circuit breaker.
CHAPTER 2 CONNECTING POWER AND SURGE PROTECTION 29
Warning
Make sure power to AC mains is disconnected while wiring the AC input. If your installation does not require AC power, you will need to use surplus DC power inside
he trac cabinet. In this case, Wavetronix recommends you use the Click 221 (8 AC
surge protector) to protect the backplate and SmartSensor Advance units from DC
surges.
Figure 2.2 – Connecting AC Power to the Preassembled Backplate
Use the following steps to connect power to the AC terminal block on the bottom DIN rail
(see Figure 2.2):
1 Connect a neutral wire (usually a white wire) to the bottom side of the terminal block
labeled “N” for neutral.
2 Connect a ground wire (usually a green wire) to the bottom of the terminal block la-
beled “G” for ground. (see the Wiring Protective Earth Ground section below).
3 Connect a line wire (usually a black wire) to the bottom of the terminal block labeled
“L” for line.
4 Turn on AC mains power.
5 Press the circuit breaker switch on the le side of the top DIN rail to switch power to
the backplate. e switch is on if the button is below the level of the device housing; the
switch is o if the button is raised above the surface of the housing.
6 Verify that DC power is properly regulated by making sure the DC OK LEDs are il-
luminated on the Click 201/202/204.
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