•Back-lit LCD screen displays complete detector status
and function settings:
•Eliminates guess work and provides critical information
necessary for proper detector setup.
•Provides accurate, direct visual feedback of channel
frequency and sensitivity settings.
•Allows easy access to built-in detector diagnostic
features.
•TrueCountTM versions provide 97% to 99% count
accuracy when used with either a single long loop or
®
multiple 6’ x 6’ loops connected together.
•Audible detect signal (buzzer) facilitates loop and/or
detector troubleshooting.
•Upgrades or addition of user specic options are easily
accomplished by changing the socket mounted processor.
•Push button programming ensures long term reliability
by eliminating switch contacts.
•All programmed detector parameters are stored in nonvolatile memory.
• Directional logic capability.
The Model S-1200 Series consists of detectors designed to meet or exceed NEMA Standards TS 1-1989.
The S-1200 detector is a two channel, shelf mount type loop detector with individual channel detect
and loop fail indications provided via two high intensity red LEDs and an easy to read LCD screen. All
detector settings and parameters are congured using a set of four push-buttons and the LCD screen.
The S-1200 offers advanced features providing built-in diagnostic capabilities all of which are viewable
by means of the LCD screen. These include: 1.) real-time loop frequency, 2.) loop inductance and
-∆L/L%, 3.) a bar-graph indication of relative inductance change (which ensures proper selection of
sensitivity level), 4.) a record of accumulated loop failures, and 5.) a timer countdown of programmed
timing functions.
3510 E. ATLANTA AVENUE, PHOENIX AZ 85040 +1.480.968.6407 EDITRAFFIC.COM
Page 2
S-1200 Series Specications
This is a basic performance specication and is not intended to be used as operating
instructions.
GENERAL CHARACTERISTICS:
Loop Frequency: The LCD screen displays the actual loop operating frequency for each
channel which makes it easy to quickly identify and eliminate crosstalk in the most difcult
to congure intersections. There are eight (8) selectable loop frequency settings per
channel (normally in the range of 20 to 100 kilohertz). The actual loop operating frequency
is a function of the loop / lead-in network and the components of the loop oscillator circuit.
Sensitivity: A unique bar-graph displayed on the LCD makes it easy to quickly set sensitivity
at the ideal level for any loop / lead-in network situation. There are nine (9) selectable
sensitivity levels per channel, plus settings for Continuous-Call and Channel-Off. See
SENSITIVITY, -∆L/L, & RESPONSE TIME table.
Continuous-Call: When set to the Continuous-Call state, the channel output is
continuously in the Call state regardless of the presence or absence of vehicles over
the loop. The loop oscillator is disabled when in the Continuous-Call state. This state
is indicated by CALL ashing on the LCD. This option is selected from the Sensitivity
menu in Program Mode and is useful for checking controller response and other
troubleshooting activities.
Channel-Off: When set to the Channel-Off state, the channel output is continuously in
the No-Call state regardless of the presence or absence of vehicles over the loop. The
loop oscillator is disabled when in the Channel-Off state. This state is indicated by OFF
ashing on the LCD. This option is selected from the Sensitivity menu in Program Mode
and is useful for checking controller response and other troubleshooting activities.
Call Delay: Each channel’s Call Delay is adjustable from 0 to 255 seconds in one-second
steps. Call Delay time begins when a vehicle enters the loop detection zone. The remaining
Call Delay time is continuously displayed on the LCD. Whenever a Phase Green Input (call
delay override) signal (pin J of either channel’s front panel mounted connector) is active
(high state), the Call Delay function for that channel is aborted and the Call Delay time is
forced to zero.
Call Extension: Each channel’s Call Extension is adjustable from 0 to 25.5 seconds in 0.1second steps. Extension time begins when the last vehicle clears the loop detection zone.
The remaining Extension time is continuously displayed on the LCD. Any vehicle entering
the loop detection zone during the Extension time returns the channel to the Detect state,
and later, when the last vehicle clears the loop detection zone, the full Extension time
starts counting down again. NOTE: See Option 3, Call Extension Control for an alternate
mode of operation for Call Extension.
Presence / Pulse: One of two mutually exclusive modes of operation for each channel can
be selected in Program Mode:
Presence Mode: Provides a minimum Call hold time of at least four minutes (regardless
of vehicle size) and typically one to three hours for an automobile or truck.
Pulse Mode: A single output Pulse of 125 ±10 milliseconds duration is generated for
each vehicle entering the loop detection zone. Each detected vehicle is instantly tuned
out if it remains in the loop detection zone longer than two seconds. This enables
detection of subsequent vehicles entering the loop detection zone. After each vehicle
leaves the loop detection zone, the channel resumes full sensitivity within 0.5 seconds.
Max Presence Timer: Each channel’s Max Presence timer is adjustable from 0 to 999
seconds in one-second steps. A setting of zero (0) turns the Max Presence timer OFF. The
Max Presence function is used to limit presence time by automatically resetting a channel.
If this function is enabled (ON), the Max Presence timer begins counting down when a
Call is initiated and the remaining time is continuously displayed on the LCD. If the loop
becomes vacant before the Max Presence timer reaches zero, the Call is dropped and
no automatic reset occurs. If the End-Of-Green (EOG) function is not enabled (OFF) and
the Call is still present when the Max Presence timer reaches zero, the channel is then
automatically reset. If the EOG function is enabled (ON) and the Call is still present when
the Max Presence timer reaches zero, the channel enters a Wait state. The Wait state
continues until the loop becomes vacant; or the Phase Green Input signal for the channel
(pin J of either channel’s front panel mounted connector) transitions from green to not
green with the Call still present. If the loop becomes vacant rst, the Call is dropped and no
automatic reset occurs. If the Phase Green Input for the channel transitions from green to
not green while the channel is in a Wait state, the channel is automatically reset. The phase
green signals on pin J are also called Call Delay Overrides.
End-Of-Green (EOG): The EOG function is used to synchronize a channel reset with the
termination of the associated phase green. The EOG function is only available when the
Max Presence function is set between 1 and 999 seconds. It is not available when the Max
Presence function is OFF. When the EOG function is enabled (ON), the channel will
automatically reset at the time the phase green input signal (pin J of either channel’s
front panel mounted connector) transitions from the ON state to the OFF state if the Max
Presence Time has counted down to zero and is resting in the Wait state. The phase green
signals on pin J are also called Call Delay Overrides. If an out of range loop failure condition
exists and is identied (i.e. loop inductance is less than 20 microhenries or greater than
2500 microhenries) the detector channel will not be reset at End-of Green and the channel
will remain in the failed state.
Option 1, Loop Inductance Display: When this option is enabled (ON), the LCD
screen displays the total loop inductance (actual loop inductance plus actual lead-in
inductance) in microhenries for loop inductance values in the range of 20 to 2500
microhenries. NOTE: Enabling this option activates it for both channels. This option
is automatically disabled 15 minutes after activation or on loss of power.
Option 2, Loop Inductance -∆L/L Display: When this option is enabled (ON), the
LCD screen displays the percentage of inductance change (-∆L/L value) during the
Call state. To facilitate viewing of the maximum change in the -∆L/L value while
trafc is in motion over the detection zone, the detector will hold the peak -∆L/L
value for a period of two seconds. NOTE: Enabling this option activates it for both
channels. This option is automatically disabled 15 minutes after activation or on
loss of power.
Option 3, Call Extension Control: When this option is enabled (ON), the channel
will extend calls for the programmed extension time only when the Phase Green
Input signal (pin J of either channel’s front panel mounted connector) is active
for the channel. When this option is OFF, the channel extends ALL calls for the
programmed extension time. The signals on pin J are also called Call Delay
Overrides. NOTE: Each channel can be enabled independently.
Option 4, Noise Filter Disable: When Option 4 is enabled (ON), internal noise
ltering is disabled thus providing a faster response time. When this option is
OFF, internal noise ltering is utilized. When the detector is used in speed and/or
occupancy applications, the noise lter should be disabled (i.e. Option 4 ON) to
provide the most accurate data possible. It is recommended that this option not
be activated. The factory default setting of OFF provides stable operation in high
crosstalk environments. NOTE: Enabling this option activates it for both channels.
Changing the setting of this feature will reset both channels. See SENSITIVITY,
-∆L/L, & RESPONSE TIME table.
Option 5, Phase Green Loop Compensation: When Option 5 is enabled (ON),
normal loop compensation is used until the Phase Green Input signal (pin J of
either channel’s front panel mounted connector) becomes active. Once the Phase
Green Input signal is active, concurrent with a call output, the detector desensitizes
the loop by 0.05% (-∆L/L) over a 15 second period. This desensitization tunes out
small changes, such as adjacent lane pickup, therefore minimizing the chance of
max timing an empty lane. A small motorcycle may also be tuned out following
the start of Phase Green. This option is useful in minimizing the effects of false
detection from adjacent lane pickup when a channel must be run with a high
sensitivity setting to ensure detection of motorcycles. When Option 5 is not
enabled (OFF), normal loop compensation is used. NOTE: Each channel can be
enabled independently.
Option 6.0, Vehicle Counting Display (TrueCountTM Models - See Model
Numbers Table): When Option 6.0 is enabled (ON) for a channel, the normal
operating display is replaced with the accumulated vehicle count display. Each
channel is capable of accumulating 65,535 counts before rolling over to zero.
The LCD display will show just the hundreds, tens, and ones digits until the
accumulated count exceeds 999. At this point the LCD display will alternate
between the ten thousands and thousands digits and the remaining three digits
for hundreds, tens, and ones.
Option 6.1, Counter Reset: This setting is used to reset the accumulated count
for the selected channel. When Option 6.1 is changed from the OFF state to the
ON state, the accumulated count for the selected channel is reset to zero. Option
6.1 will always be in the OFF state when rst viewed.
Option 7.00, Vehicle Counting Loop Conguration (TrueCountTM Models See Model Numbers Table): Each channel’s Vehicle Counting Loop Conguration
setting can be set from 7.01 to 7.05. This setting indicates the number of loops
installed in a single lane. Option 7.01 would indicate a single 6’ x 6’ loop or a long
loop such as a 6’ x 50’ QuadrupoleTM. The remaining four settings indicate the
number of 6’ x 6’ loops installed in a single lane of trafc. NOTE: Refer to the
Model S-1200 Series Operation Manual for complete installation and operation
details.
Option 9, Third Car Passage: Option 9 is a paired channel option. This means
that it takes two channels to implement this feature. When Option 9 is enabled
(ON), the outputs of the paired channels 1 and 2 are logically ANDed together.
This means that while the loops for both of the paired channels are occupied, a
call will be output on both channels. While only one loop is occupied, or neither
loop is occupied, a call will not be output on either channel. The rst channel
with detection will enter a pending state while waiting for detection on the other
paired channel. While in the pending state, the LCD will show Pnd on the display.
This feature is intended to be used in Protected / Permissive left turn situations.
The expected installation is a stop bar loop for the left turn lane connected to
one channel, a queue detection loop for the left turn lane connected to the other
channel with a small amount of delay time programmed, and the output of either
channel connected to the Vehicle Call input for the protected movement of the
trafc controller. NOTE: Refer to the Model S-1200 Series Operation Manual for
complete installation and operation details.
Page 2
Page 3
S-1200 Series Specications
Option 10, Directional Logic: Option 10 is a paired channel option. This means that it takes
two channels to implement this feature. When Option 10 is enabled (ON), directional logic
is enabled. Directional logic starts with a detection on one of the paired channels. This
channel will go into the pending state, display Pnd on the LCD screen, and NOT output a
call. When both of the paired channels have detection, the last channel to have detection
will output a Call until the detection for the last channel ends, even if the detection ends
for the rst channel. None of the timing functions (Delay, Extension, Max Presence, or
Detector Disconnect) of the rst channel with a detection will time and the rst channel
will always operate in the Presence Mode regardless of programming for the channel. The
second channel with a detection will time all timing functions as programmed.
This feature is intended to be used in parking lot applications where vehicles can enter
or exit from the same lane, freeway ramps for wrong way detection, and left turn lanes
where other movements in the intersection tend to clip the detection zone of the left
turn. The expected installation is two loops, one after the other in the same lane, spaced
anywhere from slightly overlapping to six feet apart. NOTE: Refer to the Model S-1200
Series Operation Manual for complete installation and operation details.
Option 11, Audible Detect Signal: When this option is enabled (ON), an audible signal will
be activated whenever the detection zone for the selected channel is occupied. The audible
signal indicates actual occupancy of the loop detection zone. Timing and disconnect
functions have no affect on the audible signal. This feature allows a technician to watch
the detection zone on the street and conrm correct detector operation without having to
look at the detector display as well. Only one channel can have this feature active at a given
time. Turning this option on for one channel automatically turns it off for the other channel.
NOTE: This option is automatically disabled 15 minutes after activation or on loss of power.
Option 12.0, Detector Disconnect: The Detector Disconnect feature requires that the
Phase Green Inputs for each channel be connected to the proper controller phase. When
the Phase Green Input is not active (low), the detector shall operate normally. When the
Phase Green Input is active (high), at the end of each detection, the extension timer will
start to count down. If this timer reaches zero before the next detection, this channel will
no longer output a Call until the phase green input is not active. Because the extension
timer is used as a disconnect timer while in this mode, two different disconnect types are
available:
Option 12.1 OFF: Extension timing occurs and the extension timer also serves as the
disconnect timer during phase green. This will cause the Call output to remain in the
Call state until disconnect occurs. This may allow the user to use gap times appropriate
for the advanced loops without considering the effects on the stop bar loops.
Option 12.1 ON: Extension timing is disabled and the extension timer is used as the
disconnect timer. This will cause the Call output to follow the occupancy of the loop
detection zone until disconnect occurs.
This feature is intended to be used in applications where a loop at the stop bar is not
needed after any waiting queue in the associated trafc lane is moving during the green.
Note: Refer to the Model S-1200 Series Operation Manual for complete installation and
operation details.
SPECIFICATIONS (PHYSICAL):
Weight: 34 oz (963.9 gm).
Size: 6.45 inches (16.38 cm) high x 2.50 inches (6.35 cm) wide x 6.35 inches (16.13 cm)
deep (excluding connectors). Connectors add .675 inch (1.71 cm) to depth measurement.
Operating Temperature: -40°F to +180°F (-40°C to +82°C).
Circuit Board: Printed circuit boards are 0.062 inch thick FR4 material with 2 oz. copper on
both sides and plated through holes. Circuit boards and components are conformal coated
with polyurethane.
Connector: Two (2) MS 3102A-18-1P 10 pin male. See PIN ASSIGNMENTS table.
Loop Feeder Length: Up to 5000 feet (1500 m) maximum with proper feeder cable and
appropriate loops.
SPECIFICATIONS (ELECTRICAL):
Power: 89 to 135 VAC, 50/60 Hz, 4.8 Watts maximum.
Loop Inductance Range: 20 to 2500 microhenries with a Q factor of 5 or greater.
Loop Inputs: Transformer isolated. The minimum capacitance added by the detector is
0.068 microfarads.
Lightning Protection: Meets and/or exceeds all applicable NEMA TS 1 specications for
transient voltage protection. The detector can tolerate, without damage, a 10 microfarad
capacitor charged to 2,000 volts being discharged directly into the loop input terminals,
or a 10 microfarad capacitor charged to 2,000 volts being discharged between either loop
terminal and earth ground.
Reset: Meets and/or exceeds NEMA TS 1 detector specications. The detector can
be reset by removing and reapplying power. Both channels are reset by changing
the setting of Option 4 (Noise Filter Disable). Each channel can be independently
reset by pressing the CHAN button until the desired channel is selected, then
holding the CHAN button for three seconds. Also, changing either the sensitivity
or loop frequency of a channel will reset that channel. NOTE: Resetting a channel
or changing the setting of Option 4 does not disable any selectable diagnostic
functions. If any diagnostic option(s) (Option 1, Option 2, or Option 11) has (have)
been activated, it (they) will remain activated following the channel reset or change
of Option 4 setting. Resetting the detector by removing and reapplying power
disables all selectable diagnostic features.
Phase Green Inputs: Also known as Call Delay Overrides. Meets and/or exceeds
all NEMA TS 1 requirements. Application of a high state voltage (89 to 135 VAC) to
pin J of either channel’s front panel mounted connector causes the delay timer for
the channel to abort the delay timing function and also provides control for Phase
Green Loop Compensation, Max Presence Timing (End-of-Green), Extension
Timing, and Detector Disconnect, if the features are programmed.
Solid State Output Ratings: Optically isolated. 30 VDC maximum collector
(drain) to emitter (source). 100 mA maximum saturation current. 2 VDC maximum
transistor saturation voltage. The output is protected with a 33-volt Zener diode
connected between the collector (drain) and emitter (source).
Relay Ratings: The relay contacts are rated for 6 Amps maximum, 150 VDC
maximum, and 180 Watts maximum switched power.
SPECIFICATIONS (OPERATIONAL):
Display: The LCD back-lighting illuminates whenever any push-button is pressed.
The back-lighting will extinguish 15 minutes after the last actuation of any pushbutton.
Detect Indicators: Each channel has a super-high-intensity, red, light-emittingdiode (LED) to indicate a Call output, Delay Timing, Extension Timing, Pending
state, or failed loop.
Response Time: Meets and/or exceeds NEMA TS 1 response time specications.
See SENSITIVITY, -∆L/L, & RESPONSE TIME table for actual response times.
Self-Tuning: The detector automatically tunes and is operational within two
seconds after application of power or after being reset. Full sensitivity and hold
time require 30 seconds of operation.
Environmental & Tracking: The detector is fully self-compensating for
environmental changes and loop drift over the full temperature range and the
entire loop inductance range.
Grounded Loop Operation: The loop isolation transformer allows operation with
poor quality loops (which may include one short to ground at a single point).
Loop (Fail) Monitor: If the total inductance of the channel’s loop input network
goes out of the range specied for the detector, or rapidly changes by more
than ±25%, the channel will immediately enter the Fail-Safe mode and display
LOOP FAIL on the LCD. The type of loop failure will also be displayed as L lo
(for -25% change or shorted loop conditions) or L hi (for +25% change or open
loop conditions). This will continue as long as the loop fault exists. However, if the
detector is reset, or power is momentarily lost, the detector will retune if the loop
inductance is within the acceptable range. If any type of loop failure occurs in one
(or more) loop(s) in a group of two or more loops wired in parallel, the detector
will not respond with a Fail-Safe output following any type of reset. It is essential
that multiple loops wired to a common detector channel always be wired in
series to ensure Fail-Safe operation under all circumstances. At the time of a loop
failure, the channel’s LED will begin to ash at a rate of three ashes per second.
The LED will continue this display pattern until the channel is manually reset or
power is removed. If the loop self-heals, the LOOP FAIL message on the LCD will
extinguish and the channel will resume operation in a normal manner; except the
LED will continue the three ashes per second display pattern, thus providing an
alert that a prior Loop Fail condition has occurred. Each loop failure for the channel
is counted and accumulated into the Loop Fail Memory. The total number of loop
failures written into the Loop Fail Memory (since the last power interruption or
channel reset) is viewed by stepping through the channel’s functions in Program
Mode until the LOOP FAIL message is displayed.
Full Restore To Factory Defaults: Pressing and holding all four front panel
switches simultaneously and continuously for ve seconds resets the detector
and restores all the factory default settings. The countdown of the ve-second
period is displayed on the LCD screen. Releasing any of the switches before the
countdown ends will abort the Full Restore operation. See FACTORY DEFAULT
SETTINGS table.
Display Test: Pressing any two or three of the front panel switches simultaneously
will display all possible symbols and messages on the LCD screen.
Note: Entries in this table are based on the assumption that both detector channels are
set to the same sensitivity. To achieve the exact response times listed above, the Sensitivity of both channels must be set the same. To approximate response times for a detector
with channels set to different sensitivities, look up the response time for each channel and
divide it by two, then add these times together.
A Power, Neutral, 120 VACA No Connection
B Output, Relay CommonB Output, Relay Common
C Power, Line, 120 VACC No Connection
D Loop InputD Loop Input
E Loop InputE Loop Input
F Output, Relay Normally OpenF Output, Relay Normally Open
G
A Power, Neutral, 120 VACA No Connection
B Output, Relay CommonB Output, Relay Common
C Power, Line, 120 VACC No Connection
D Loop InputD Loop Input
E Loop InputE Loop Input
F Output, Relay Normally OpenF Output, Relay Normally Open
G