Peek Traffic 625X User manual

1
625X
Inductive Loop Detector
Installation Guide
Sarasota Series Detectors

2
Copyright © 2008, Peek Traffic Corporation,
Printed in the USA. All rights reserved.
Information furnished by Peek Traffic is believed to be accurate and
reliable, however Peek does not warranty the accuracy, completeness,
or fitness for use of any of the information furnished. No license is
granted by implication or otherwise under any intellectual property. Peek
reserves the right to alter any of the Company's products or published
technical data relating thereto at any time without notice.
No part of this publication may be reproduced, stored in a retrieval
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means for any purpose other than the purchaser’s personal use without
the expressed, written permission of Peek Corporation
Peek Traffic Corporation
2906 Corporate Way
Palmetto, FL 34221 USA
Trademarks
The Sarasota Model 625X and 601/602 Series Detectors are trademarks
or registered trademarks of Peek Traffic Corporation in the USA and
other countries. Other brands and their products are trademarks or
registered trademarks of their respective holders and should be noted as
such.
Content:: 99-377-3
Assy: 81-1002-3

3
Quick Setup
1. Verify the input voltage by looking at the label on the back
of the detector (located just under the connector.)
2. Terminate the wiring harness to the proper connector on
the terminal strip for each of the desired functions (power,
desired outputs, loop, etc.)
3. Connect the harness to the detector.
4. Verify power is reaching the detector. (The Presence LED
should come on and flash for two seconds, then go out.)
5. Set sensitivity switch (SENS) to Medium (M).
6. Adjust the frequency (FREQ) to Low (L) for a single loop.
For multiple loop applications, set each detector to a differ-
ent frequency setting.
7. Press and hold the RESET button for three seconds, until
the Presence LED flashes. The detector is ready to oper-
ate.
Upon power-up, Presence LED will flash
for 2 seconds, then go out.
Sensitivity: First set to Medium, then
adjust if necessary.
Frequency: Set to Low or Medium for
single loop installations.
To Reset Detector: Press and hold for 3
seconds, or until Presence LED blinks.

4
Setup Details
1. Power is supplied to the unit on pins 1 & 2 (black
& white.)
2. Ground the unit by taking pin 4 (green) to the
Operator ground.
3. The most common hook-up is for using the Pres-
ence relay, pins 5 & 6 (yellow & blue.) The Pres-
ence relay common, pin 5 (yellow), is taken to the
common of the terminal strip on the Operator.
The Presence relay
N.O. Normally Open, pin 6 (blue) is taken to ei-
ther Open, Close, Hold Open, etc. (i.e. whichever
function is to be performed when presence is
detected.)
4. For a second Presence or Pulse output, Relay 2
on pins 3 & 9 is used. Relay 2 Normally Open
(N.O.) is on pin 3 (orange) and is taken to either
Open, Close, Hold Open, etc. (whichever func-
tion is to be performed.) If a Normally Closed
(N.C.) output is necessary, use pin 11 (white/red).
The Relay 2 common, pin 9 (red) is taken to the
common on the terminal strip of the Operator.
5. The loop leads come into the detector on pins
7 & 8 (gray & brown.) This is from the loop to the
ground. These leads must be twisted all the way
to the detector for proper operation.
(See diagram on page 7.)

5
625X Pin Connections
Pin Function Wire Color
1120VAC or 24VAC Black
2AC Neutral Common White
3Relay 2 N.O. (Normally Open) Orange
4Chassis Ground Green
5Presence Relay Common Yellow
6Presence Relay (Normally Open) Blue
7Loop Gray
8Loop Brown
9Relay 2 Common Red
10 Presence Relay (Normally Closed) White/Black
11 Relay 2 (Normally Closed) White/Red

6
Loop Installation Tips
The loop consists of a 12 to 18 gauge stranded wire
suitable for direct burial with low AC and DC resis-
tance. The size of your loop will be determined by the
width of the area in which you need detection, and the
height of the vehicles you need to detect. If high-bed
trucks will be detected, the loop should be no less than
6’ on a side (i.e. at least 6’×6’.)
Smaller loops are suitable for car or fork truck detec-
tion. The depth of the saw cut is typically 1¼” to 2”,
and from ¼” to 3/8” wide. Cut the corners of the loop
to 45° angles to avoid pulling loop wires around a 90°
corner and risk damaging the wires. Do no push the
loop wires into the saw-cut with a sharp object. Be
sure to keep the loops a minimum of 2” above any
rebar or wire mesh installed in the roadway.
The loop wire is wound to form a coil (usually 3 to 5
turns.) Ideally, there should be no splices in the loop.
Or, in other words, attach your loop wire to the gray
wire in the wiring harness, run the loop out to your
saw-cut, go around the saw cut the recommended
number of times, return the loop wire back to the de-
tector. Twist the lead-in portion of the loop wires at
least 5 to 7 twists per foot, and then connect the other
end of the loop wire to the brown wire on the wiring
harness. The lead-ins and loop should be made of one
continuous piece of wire.
Important: Twist only the lead-in (the part of the loop
wire that runs from the edge of the loop back to the
detector.)
Do not twist the wires in the loops themselves.

7
Testing the Loop
A good loop is critical for reliable operation from your
detector. When installing your loop, take great care not
to damage the insulation of the wire. Breaks in the
insulation can cause the wire to act as a wick —pull-
ing in moisture, corroding the wire itself, and causing
erratic operation from the detector. Cross-link polyeth-
ylene is the most popular insulation and is strongly
recommended (XHHW), in 16 or 18 gauge. If the lead-
in is extremely long, increase the wire size. The insula-
tion must be able to withstand wear and abrasion from
the shifting of pavement, moisture, and attacks by
solvents and oils, as well as able to withstand high-
temperature sealants. Stranded wire is recommended
over solid wire, because of its mechanical characteris-
tics. Stranded wire is more likely to survive bending
and stretching than solid wire.
Megging a loop and lead-in should have an insulation
resistance to earth greater than 20MS, measured at
500 Volts. One end of the loop goes to one lead from
the meggar, and the other lead from the meggar goes
to a good ground. The loop should also display a se-
ries resistance of less than 10Swith a standard Ohm
meter. If a problem with a loop is suspected, try swap-
ping the detector with a known good detector and see
if the problem follows the detector or the loop.

8*optimum detection range is between 70µH and 250µH
Loop Size
(ft) 1 Turn 2 Turns 3 Turns 4 Turns
4 × 4 720 44 78
4 × 6 825 56 100
4 × 10 12 36 81 144
4 × 15 17 50 112 199
4 × 20 21 64 143 253
4 × 25 26 78 174
4 × 30 30 91 204
4 × 35 35 105 235
4 × 40 39 119 266
4 × 45 44 132
4 × 50 49 146
4 × 55 53 160
4 × 60 58 174
4 × 65 62 187
4 × 70 67 201
4 × 75 71 215
4 × 80 76 228
4 × 85 81 242
4 × 90 85 256
4 × 95 90 270
Inductance(µH)*
4 × 100 94 283
4 Foot Loop Width

9
*optimum detection range is between 70µH and 250µH
Loop Size
(ft) 1 Turn 2 Turns 3 Turns 4 Turns
6 × 4 825 56 100
6 × 6 10 31 70 124
6 × 10 14 43 96 171
6 × 15 19 58 129 229
6 × 20 24 72 161 286
6 × 25 29 87 194
6 × 30 34 101 226
6 × 35 38 116 259
6 × 40 43 130
6 × 45 48 145
6 × 50 53 159
6 × 55 58 173
6 × 60 63 188
6 × 65 67 202
6 × 70 72 217
6 × 75 77 231
6 × 80 82 246
6 × 85 87 260
6 × 90 91 275
6 × 95 96 289
Inductance(µH)*
6 × 100 101 303
6 Foot Loop Width

10
Output Configuration Options
Presence means the relay will be energized the entire
time a metal mass is within the field generated by the
loop. The 625X has the ability to provide two presence
outputs. Relay 2 can be set for presence or pulse.
Relay 1 is always presence (pins 5 & 6, yellow and
blue wires), however Relay 2 on the 625X can be
assigned to one of several output configurations.
Relay 2 (pins 3 & 9, Orange and Red wires) can be set
for presence using the switches on the back panel. Set
switch 3 to OFF and switch 2 to ON
Pulse on Entry means that the relay 2 will be ener-
gized as soon as a metal mass enters the field gener-
ated by the loop. On the back panel, set switch 3 to
OFF and switch 2 to OFF. This pulse will last 125mS.
Pulse on Exit means that relay 2 will be energized
when a metal mass has left the loop. Set switch 3 to
ON and switch 2 to OFF. The pulse will last 125mS.
Loop fault output means the relay will be energized if
there is a current fault (open loop, shorted loop or
greater than a 25% inductance
change.) Set switch 3 to ON
and switch 2 to ON.
3
2
1
ON
Switches 2 & 3 control which
output function of Relay 2 is used.
Switch 1 ON doubles the sensitivity
settings on the front panel