EDI DEFLECTOMETER LMD301 User manual

THIS MANUAL CONTAINS TECHNICAL INFORMATION FOR THE LMD301, LMD301S,
LMD301T, LMD301TS, LMD302, LMD302T, LMD302TS, LMD304, and LMD304S
SERIES INDUCTIVE LOOP MONITOR.
REVISION: FEBRUARY 2010
pn 888-030X-002
LMD301, LMD302, LMD304
Shelf Mount Series
Inductive Loop Monitor
Operations Manual

THE LMD301, LMD302, and LMD304 SERIES IS DESIGNED AND MANUFACTURED IN
THE USA BY
EBERLE DESIGN INC.
PHOENIX, ARIZONA
EDI IS CERTIFIED TO ISO 9001:2008 QUALITY SYSTEMS STANDARDS.
INFORMATION CONTAINED HEREIN IS PROPRIETARY TECHNICAL INFORMATION
OF EBERLE DESIGN INC. PUBLICATION, REPRODUCTION OR USE IN WHOLE OR
PART IS NOT PERMITTED EXCEPT UNDER TERMS AGREED UPON IN WRITING.
DEFLECTOMETER IS A TRADEMARK OF EBERLE DESIGN INC.
©COPYRIGHT 2010 EDI.

Section 1 GENERAL......................................................................................................... 1
Table of Contents
1.1 Description............................................................................................................. 1
1.2 Overview................................................................................................................ 1
1.3 DEFLECTOMETER Feature................................................................................... 1
Section 2 Installation and Adjustments.......................................................................... 2
2.1 Set the Sensitivity Level ......................................................................................... 2
2.1.1 Adjusting Sensitivity Using the DEFLECTOMETER®(Recommended).......... 2
2.1.2 Adjusting Sensitivity Directly ......................................................................... 3
2.1.3 Dynamic DEFLECTOMETER®Display Operation......................................... 3
2.2 Set the Operational Mode....................................................................................... 3
2.2.1 Output Call Test............................................................................................ 3
2.2.2 Short Presence Mode (S).............................................................................. 3
2.2.3 Long Presence Mode (L)............................................................................... 3
2.2.4 Pulse Mode (P)............................................................................................. 4
2.2.5 Call Mode (C)................................................................................................ 4
2.2.6 Off Mode (-) .................................................................................................. 4
2.2.7 Output Minimum Pulse Option....................................................................... 4
2.3 Set the Frequency.................................................................................................. 4
2.3.1 Displaying the Loop Frequency..................................................................... 4
2.4 Set the Delay and Extend Timing (LMD301t and LMD302T Only) .......................... 4
2.4.1 Delay Timing................................................................................................. 4
2.4.2 Extend Timing............................................................................................... 5
2.4.3 Timer Control Input ....................................................................................... 5
2.5 Miscellaneous ........................................................................................................ 5
2.5.1 Channel Off................................................................................................... 5
2.5.2 Retune or Reset a Channel........................................................................... 5
2.5.3 Factory Default Settings................................................................................ 5
2.6 Loop Fault Monitoring............................................................................................. 5
2.6.1 Current Fault................................................................................................. 5
2.6.2 Previous Fault............................................................................................... 6
Section 3 Loop Installation.............................................................................................. 7
Section 4 Specifications .................................................................................................. 9
4.1 Mechanical............................................................................................................. 9
4.1.1 LMD301........................................................................................................ 9
4.1.2 LMD302 and LMD304................................................................................... 9
4.2 Environmental........................................................................................................ 9
4.3 Electrical ................................................................................................................ 9
4.4 Tuning.................................................................................................................... 9
4.4.1 Loop Inductance (Tuning) Range.................................................................. 9
4.4.2 Environmental Tracking ................................................................................ 9
4.4.3 Grounded Loop Operation............................................................................. 9
4.4.4 Lead-in Length.............................................................................................. 9
4.5 Loop Input (Lightning Protection)...........................................................................10
4.6 Response Timing ..................................................................................................10
4.6.1 LMD301 and LMD301T................................................................................10
4.6.2 LMD301S (Solid-State Outputs)...................................................................10
4.7 LMD301(T) Connector Pin Assignments................................................................10
4.8 LMD302(T) Connector Pin Assignments................................................................10
4.9 LMD304 Connector Pin Assignments....................................................................11

LMD301, LMD302, and LMD304
Series Operations Manual
Eberle Design Inc. Page 1
Section 1
GENERAL
1.1 DESCRIPTION
The LMD301 Loop Monitor DEFLECTOMETER®Series is a single channel inductive loop
vehicle detector. The LMD302 Loop Monitor DEFLECTOMETER®Series is a two channel
inductive loop vehicle detector. The LMD304 Loop Monitor DEFLECTOMETER®Series is a
four channel inductive loop vehicle detector. The units meet or exceed all requirements for
detectors as defined in Nema Standard TS1-1989 (R2005). Each channel has individual
controls for setting up sensitivity, operational mode and frequency on the front panel, along
with detection and fault status indicators.
LMD301 One Channel
Model Channels Features
LMD301S One Channel Solid State Outputs
LMD301T One Channel Delay and Extension Timing
LMD302 Two Channel
LMD302S Two Channel Solid State Outputs
LMD302T Two Channel Delay and Extension Timing
LMD304 Four Channel
LMD304S Four Channel Solid State Outputs
1.2 OVERVIEW
A dynamic Overview of the LMD operation which includes an LMD Simulator is available on
the EDI Web Site; www.EDItraffic.com.
1.3 DEFLECTOMETER FEATURE
The LMD Series Loop Monitor introduces a concept to the inductive loop detector field that
revolutionizes the process of installing and programming a loop detector. The new user
interface of the LMD Series provides the feedback necessary to the signal technician to
quickly and accurately program the parameters of the detector exactly to the loop plus lead-
in system characteristics.
Loop diagnostic capabilities incorporated within the LMD Series Loop Monitor enable the
detection of short or open circuit loops and sudden changes of inductance exceeding 25
percent of the nominal inductance. Each type of fault is signified by the fault indicator
emitting a different flash sequence. This information can greatly assist the user in the
diagnosis of loop related problems.
Why guess when you can know!
The DEFLECTOMETER®display shows the relative strength of the call while a vehicle
is in the detection zone. This provides feedback that the unit is optimally tuned to
detect vehicles of all sizes.
Setting the sensitivity level of the detector can be easily done in one step with a
“typical” vehicle parked in the detection zone. The DEFLECTOMETER®display
updates dynamically as the sensitivity level is changed. See section 2.1.1.
The simple push-button interface is intuitive and eliminates many of the reliability
problems found with tiny DIP switches of conventional detectors.
Operational mode, Frequency, and Sensitivity are all programmed and displayed using
the push-button interface. Settings are stored in non-volatile memory.

LMD301, LMD302, and LMD304
Series Operations Manual
Eberle Design Inc. Page 2
Section 2
Installation and Adjustments
2.1 SET THE SENSITIVITY LEVEL
The DEFLECTOMETER®(front panel 7-segment LED display) aids in setting the detector
to the most optimum sensitivity level to ensure the detection of all vehicles, including
motorcycles and high bed vehicles.
For typical vehicles (mid-size vehicle / small pick up) utilizing properly installed roadway
loops, when the Call Strength value 4, 5, or 6 (5 being optimum) is displayed on the
DEFLECTOMETER®during the DETECT output period then the sensitivity level is set
correctly. For high profile vehicles (commercial trucks, 4x4’s, etc…), a DEFLECTOMETER®
Call Strength value of 4 will be best. For low profile vehicles (sports cars, etc…), a
DEFLECTOMETER®Call Strength value of 6 will be best.
2.1.1 ADJUSTING SENSITIVITY USING THE DEFLECTOMETER®(RECOMMENDED)
The DEFLECTOMETER®should read zero (0) with no vehicle over the roadway loop. With
a typical mid-sized vehicle in the detection zone (DET indicator On), the
DEFLECTOMETER will display the Call Strength value (1 - 9).
If a mid-size vehicle, located over the roadway loop causes the Call Strength value “7” to
be displayed on the DEFLECTOMETER®, the sensitivity should be lowered two levels (7 –
2 = DEFLECTOMETER reading “5”). This is done by pressing the front panel SENS
(down) button twice.
If a mid-size vehicle, located over the roadway loop causes the value “2” to be displayed on
the DEFLECTOMETER®, the sensitivity should be increased three levels (2 + 3 =
DEFLECTOMETER®reading “5”. This is done by pressing the front panel SENS(up)
button three times.
NOTE: The DEFLECTOMETER®dynamically updates after each Sensitivity Level
change, allowing changes to the Sensitivity setting while a vehicle remains in
the loop detection zone. Note that the Call Strength value may be different than
the actual Sensitivity Level setting.

While the LMD Series unit is in the Call state (DEFLECTOMETER = 1-9), the
DEFLECTOMETER®displays the Call Strength (1 – 9). The Call Strength will
increase or decrease one step as the Sensitivity Level is increased or
decreased one step.
The Call Strength value will depend on the size and type of vehicle in the
detection zone as well as the Sensitivity Level setting of the channel. The
optimum value for a mid-sized vehicle is 5.
The procedure in section 2.1.1 provides a quick and simple way to program
the Sensitivity Level to the optimum setting to ensure all classes of vehicles
are reliably detected with one simple step.
The resulting Sensitivity Level can be then be displayed using the procedure
in section 2.1.2. While the LMD Series is in the No-Call state
(DEFLECTOMETER = 0), the DEFLECTOMETER®
will display the
Sensitivity Level (1 – 9) when either SENS button is pressed once.

LMD301, LMD302, and LMD304
Series Operations Manual
Eberle Design Inc. Page 3
2.1.2 ADJUSTING SENSITIVITY DIRECTLY
The LMD Series offers nine levels of sensitivity (1 to 9). The Sensitivity Level can be
manually set to any desired level by pressing the SENSor SENSfront panel buttons
when a vehicle is NOT over the roadway loop. The Sensitivity Level will be now displayed
on the DEFLECTOMETER®. Pressing the SENSor SENSbutton once will display the
Sensitivity Level without changing the setting. After pressing the SENSor SENS
buttons to display the Sensitivity Level, the setting can then be modified by pressing the
SENSor SENSbuttons again. The display will automatically return to the normal
display after three seconds. The factory default Sensitivity Level is 6.
Sensitivity
∆L / L
Sensitivity
∆L / L
9
0.01%
4
0.32%
8
0.02%
3
0.64%
7
0.04%
2
1.28%
6
0.08%
1
2.56%
5
0.16%
-
-
Note that each change of the Sensitivity Level while in this “direct adjust” mode causes the
LMD Series to retune.
2.1.3 DYNAMIC DEFLECTOMETER®DISPLAY OPERATION
While the LMD Series is in the Call state (DEFLECTOMETER = 1-9), the
DEFLECTOMETER®displays the Call Strength (1 – 9). When the Call terminates (DET
indicator Off) the Call Strength will be displayed for an additional three seconds. Pressing
the SENSor SENSbutton during this interval will modify the Sensitivity Level as
described in section 2.1.1, with the DEFLECTOMETER®display remaining in the Call
Strength mode.
Pressing the SENSor SENSbutton when the LMD Series is not in the Call state
(DEFLECTOMETER = 0) will display and modify the Sensitivity Level directly as described
in section 2.1.2. In this case the DEFLECTOMETER®displays the actual Sensitivity Level.
2.2 SET THE OPERATIONAL MODE
Operational mode can be set to Short Presence, Long Presence, Pulse, Call or Off mode.
Pressing the MODE button once will display the Operational Mode without changing the
setting. After pressing the MODE button to display the current Operational Mode, the
setting can then be changed by pressing the MODE button again. The display will
automatically return to the normal display after several seconds.
Setting a new Operational Mode will cause the channel to retune.
2.2.1 OUTPUT CALL TEST
When the MODE button is pressed and held for one second, the unit will generate a pulsed
(125 ms) Call state (true) output every 1500 ms. This operation can be used to quickly
verify that a Call output is being received by the Controller Unit.
2.2.2 SHORT PRESENCE MODE (S)
The Short Presence mode will tune out a continuous Call after 30 minutes. Use Short
Presence unless the detection zone is expected to be continuously occupied for periods of
time in excess of 30 minutes.
2.2.3 LONG PRESENCE MODE (L)
The Long Presence mode will tune out a continuous Call after 120 minutes.

LMD301, LMD302, and LMD304
Series Operations Manual
Eberle Design Inc. Page 4
2.2.4 PULSE MODE (P)
The Pulse mode will provide a 125 ms ± 25ms width output pulse for each vehicle entering
the loop..
2.2.5 CALL MODE (C)
The Call mode will set the channel output to the Call state (True). This mode can be used
to provide a continuous Call state to the Controller Unit regardless of the state of the
detection zone. Loop fault conditions are ignored in this mode.
2.2.6 OFF MODE (-)
The Off mode will set the channel output to the No Call state (False). This mode can be
used if the channel is not used or not connected to a loop. Loop fault conditions are ignored
in this mode.
2.2.7 OUTPUT MINIMUM PULSE OPTION
When the diode jumper labeled OPT2 on the PCB is installed, the unit will limit the
minimum output Call state (True) to 125 milliseconds.
2.3 SET THE FREQUENCY
Pressing the FREQ button once will display the
Frequency Level (1 – 4) without changing the setting.
After pressing the FREQ button to display the current
Frequency Level, the setting can then be changed by
pressing the FREQ button again. The display will
automatically return to the normal display after several
seconds.
The Frequency level needs to be changed only if interference occurs between adjacent
loops connected to different sensor units. Interference or crosstalk may manifest itself as
chattering of the call output or a detect call occurring at the same time as an adjacent unit
when there is no vehicle present. If crosstalk is suspected, try to separate the frequencies
of the channels causing the problem. A minimum of 5 KHz separation is recommended.
Four frequency levels are available on each channel to assist in alleviating interference
affecting more than two units.
Changing the Frequency Level will cause the channel to retune.
2.3.1 DISPLAYING THE LOOP FREQUENCY
The current loop frequency is displayed by after pressing the FREQ button to display the
current Frequency Level. The frequency is shown in KHz with a “-“ symbol displayed both
before and after the numeric digits shown on the DEFLECTOMETER®.
For example, after pressing the FREQ button once the display sequence might show:
“3” “-“ “2” “7” “-“
This sequence would indicate Frequency Level “3” and a loop reference frequency of 27
KHz.
2.4 SET THE DELAY AND EXTEND TIMING (LMD301T AND LMD302T ONLY)
2.4.1 DELAY TIMING
For each channel, a delay time of 1 to 63 seconds can be set via the DELAY DIP switches.
The numeric sum of the switches in the On position is equal to the Delay time. Call Delay
Frequency
Level 4
High
Level 3
Medium High
Level 2
Medium Low
Level 1
Low

LMD301, LMD302, and LMD304
Series Operations Manual
Eberle Design Inc. Page 5
time starts counting down when a vehicle enters the loop detection area. During the Delay
time the DET indicator will flash two times per second and the DEFLECTOMETER®will
display the letter “d”. Delay time can be overridden by a True signal at the Timer Control
input.
2.4.2 EXTEND TIMING
For each channel, an extend time of 0.25 to 15.75 seconds can be set via the EXTEND DIP
switches. The numeric sum of the switches in the On position is equal to the Extend time.
Call Extend time starts counting down when the last vehicle clears the loop detection zone.
During the Extend time the DET indicator will flash four times per second and the
DEFLECTOMETER®will display the letter “E”. Any vehicle entering the loop detection zone
during the Extend time period causes the Extend timer to be reset and the output
maintained. The Timer Control input has no effect on this mode.
2.4.3 TIMER CONTROL INPUT
A Timer Control input is provided for to modify the operation of the Delay Timing functions.
The application of an AC voltage will inhibit the Delay timing function as described in
section 2.4.1. When the Timer Control Input is active (True) the decimal point of the
channel DEFLECTOMETER®display will illuminate.
The Timer Control input is primarily provided for downward compatibility.
2.5 MISCELLANEOUS
2.5.1 CHANNEL OFF
If a channel is not to be used, it may be switched off (disabled) by setting the Operational
Mode to OFF. See section 2.2.6.
2.5.2 RETUNE OR RESET A CHANNEL
Press the MODE and FREQ buttons simultaneously to reset the channel. This will clear any
previous loop fault indication and cause the channel to retune.
2.5.3 FACTORY DEFAULT SETTINGS
Press the MODE and FREQ buttons simultaneously while first applying power to the unit to
reset all channels to the factory default settings.
Factory Defaults
Sensitivity Level
6
Operational Mode
Short Presence
Frequency Level
High
2.6 LOOP FAULT MONITORING
The LMD Series Loop Monitor continuously checks the integrity of the loop. The system is
able to detect open circuit loops, shorted loops, or sudden changes in inductance
exceeding 25% of the nominal inductance.
2.6.1 CURRENT FAULT
If a fault is detected, both the DET (Red) and FLT (Yellow) LEDs continuously emit a
sequence of flashes and the DEFLECTOMETER®will display the letter “F”. Each type of
fault is identified by a different flash sequence followed by a one second pause:

LMD301, LMD302, and LMD304
Series Operations Manual
Eberle Design Inc. Page 6
Flash Sequence
Fault
1 flash Open Circuit Loop (or Inductance too high)
2 flashes
Shorted Circuit Loop (or inductance too low)
3 flashes
>25% Change in Inductance
2.6.2 PREVIOUS FAULT
If the fault condition is removed, the DET indicator and the channel output will return to
normal operation. The FLT indicator will continue to flash indicating that a fault had
previously occurred. This Previous Fault indication may be reset by momentarily pressing
the MODE and FREQ buttons simultaneously. See section 2.5.2.

LMD301, LMD302, and LMD304
Series Operations Manual
Eberle Design Inc. Page 7
Section 3
Loop Installation
The typical sensing height is 2/3 of the shortest leg of a loop (in feet). Therefore a 4’ x 8’
loop typically has a detection height of 2.6’.
The inductance of a conventional four-sided loop can be estimated using the formula:
L = P x (T2+ T) / 4 Where L = Loop Inductance in microHenries
P = Loop Perimeter in feet
T = Number of wires in saw slot
Therefore a 4’ x 8’ loop with 3 turns would be:
L = (4 + 8 + 4 + 8) x (32 + 3) / 4
L = 24 x (9 + 3) / 4
L = 24 x 12 / 4
L = 72 microHenries
Note: Loop feeder cable typically adds 0.22 microHenries of inductance per foot of cable.
The following are suggested guidelines for loop installation:
To begin, make sure that the pavement surface in the area that loops are to be installed is
dry and free of debris. The outline of the loop(s) should be marked on the pavement in such
a way that the lines can be followed easily by the saw operator and not be erased by the
water feed from the saw itself.
All 90-degree corners should be chamfered so that the course of the loop wire does not
change direction sharply but rather at shallower angles of 45 degrees or less. Core drilling
of the corners achieves the same effect but can still lead to failure due to sharp edges
remaining in the corner area. When the outline of the loop and lead-in has been marked,
the pavement can be cut. Diamond blade cutting saws are recommended. The saw cut
should be approximately 2.0 inches deep and 0.25 inches wide. The saw slot should then
be cleaned out and allowed to dry. Compressed air is useful both for ejecting debris and
speeding up the drying process. All debris in the vicinity of the saw slot should also be
removed so that it is not accidentally pushed back in.
As a general rule loops with circumference lengths less than 12 feet require 5 turns of wire,
12 to 60 feet require 3 to 4 turns of wire, loops with greater circumference lengths should
have 2 to 3 turns.
Recommended loop wire is typically 14, 16, 18, or 20 AWG with cross-linked polyethylene
insulation. Since moisture can cause significant changes in the dielectric constant of the
insulation, which results in excessive loop (frequency) drift, choose insulation, which is
most impervious to moisture. PVC, TFFN, THHN, and THHN-THWN should be avoided
since they tend to absorb moisture and crack easily. XLPE (Cross Linked Polyethylene) is
very resistant to moisture absorption and provides good abrasion resistance.
If long lead-ins are required, it is suggested that the loop cable be spliced onto shielded,
pre-twisted, lead-in wire (IMSA specification 50-2 is suggested) at a convenient pull box
location close to the loop. The shield may be connected to earth at the cabinet end but
should then be insulated and isolated from earth ground at the loop end. The inductance of
the loop itself should be at least 50% of the sum of loop inductance plus lead-in inductance.
Start laying the loop wire from the termination of the lead-in out towards the loop, continue
around the loop for the number of turns required and finally return to the lead-in
termination. Leave the lead-in wire out of the slot so that it may be twisted together before
being laid in the slot. Lead-ins should be twisted with a minimum of 4 to 6 twists per foot to
prevent any separation of the lead-in wires.
Make sure that the loop wire is pushed fully to the bottom of the saw slot. Small pieces of
foam rubber (backer rod) or similar material may be used at various points around the

LMD301, LMD302, and LMD304
Series Operations Manual
Eberle Design Inc. Page 8
circumference to prevent the loop wire from rising up while the sealant is poured and
curing.
Many different types of loop sealant are now available. Single part types are the easiest to
apply since no mixing is required, but they also tend to be more expensive in terms of linear
feet of saw slot filled. When applying the sealant, make sure that it is able to sink to the
bottom of the slot and completely encase the loop wire. The wire should not be able to
move when the sealant has set. Ensure that there is enough sealant to completely fill the
slot; if possible the sealant should protrude slightly above the surface of the pavement so
that small rocks or other debris cannot collect in the slot.
The sealant manufacturer instructions concerning setting time should be noted especially
when determining the length of time to wait before allowing vehicles to cross the loop area.
Consult the Eberle Design web site at www.EDItraffic.com for further application
information regarding loop design.

LMD301, LMD302, and LMD304
Series Operations Manual
Eberle Design Inc. Page 9
Section 4
Specifications
4.1 MECHANICAL
4.1.1 LMD301
Height .......................................................................................................... 5.5 inches
Width .......................................................................................................... 2.0 inches
Depth (chassis only)..................................................................................... 5.4 inches
4.1.2 LMD302 AND LMD304
Height .......................................................................................................... 6.4 inches
Width .......................................................................................................... 3.0 inches
Depth (chassis only)..................................................................................... 7.3 inches
4.2 ENVIRONMENTAL
Storage Temperature Range................................................................... -45 to +85 oC
Operating Temperature Range................................................................ -34 to +74 oC
Humidity Range (non-condensing).....................................................0 to 95% Relative
4.3 ELECTRICAL
AC Supply Voltage Minimum............................................................................ 89 Vac
AC Supply Voltage Maximum.......................................................................... 270 Vac
AC Supply Frequency.................................................................................... 50/60 Hz
AC Supply Power Maximum............................................................................. 3 watts
AC Timer Control Inputs
True (active) ...........................................................................greater than 70 Vac
False (not active)........................................................................ less than 15 Vac
Optically Isolated Outputs
True (low, 50 mA).......................................................................less than 1.5 Vdc
False (high) ............................................................................greater than 16 Vdc
Maximum Leakage Current (high)...................................................less than 1 uA
Maximum Current.....................................................................................100 mA
Relay Outputs
AC Contact Rating..........................................................................5A @ 240 Vac
DC Contact Rating............................................................................5A @ 30 Vdc
4.4 TUNING
4.4.1 LOOP INDUCTANCE (TUNING) RANGE
The detector will automatically tune to a loop and lead-in combination within the tuning
range of 20 to 2500 microHenry with a Q factor greater than 5.
4.4.2 ENVIRONMENTAL TRACKING
The detector automatically and continuously compensates for component drift and
environmental effects throughout the tuning range and across the entire temperature range.
4.4.3 GROUNDED LOOP OPERATION
A detector channel will operate when connected to poor quality loops including those that
have a short to ground at a single point.
4.4.4 LEAD-IN LENGTH
The unit will operate with lead-in (feeder) lengths up to 5,000 feet (1,524 m.) with
appropriate loops and proper lead-in cable.

LMD301, LMD302, and LMD304
Series Operations Manual
Eberle Design Inc. Page 10
4.5 LOOP INPUT (LIGHTNING PROTECTION)
The loop input incorporates lightning and transient protection devices and the loop
oscillator circuitry is transformer-isolated for each channel. The lightning protection will
withstand the discharge of a 10uF capacitor charged to 2,000V across the loop inputs or
between a loop input and Earth Ground. The transformer isolation allows operation with a
loop which is grounded at a single point.
4.6 RESPONSE TIMING
4.6.1 LMD301 AND LMD301T
Sensitivity Level
Response
Sensitivity Level
Response
9
32-49 ms
4
17-26 ms
8
20-30 ms
3
17-26 ms
7
17-26 ms
2
17-26 ms
6
17-26 ms
1
17-26 ms
5
17-26 ms
--
--
4.6.2 LMD301S (SOLID-STATE OUTPUTS)
Sensitivity Level
Response
Sensitivity Level
Response
9
25-38 ms
4
11-16 ms
8
13-19 ms
3
11-16 ms
7
11-16 ms
2
11-16 ms
6
11-16 ms
1
11-16 ms
5
11-16 ms
--
--
4.7 LMD301(T) CONNECTOR PIN ASSIGNMENTS
Pin
Function
A
Neutral (AC-)
B
Ch 1 Output Relay Common (Emitter)
C
Power (AC+)
D
Channel 1 Loop Input
E
Channel 1 Loop Input
F
Ch 1 Output Relay N.O. (Collector)
G
Ch 1 Output Relay N.C.
H
Earth Ground
I
No Connect
J
Ch 1 Timer Control (LMD301T)
N.O. is Normally Open, N.C. is Normally Closed.
Relay Contacts are shown with power applied, loops connected and no vehicle present.
Connector mates with MS3106A-18-1S or equivalent.
4.8 LMD302(T) CONNECTOR PIN ASSIGNMENTS
Pin
Channel 1 Function
Pin
Channel 2 Function
A
Neutral (AC-)
A
No Connect
B
Ch 1 Output Relay Common (Emitter)
B
Ch 2 Output Relay Common (Emitter)
C
Power (AC+)
C
No Connect
D
Channel 1 Loop Input
D
Channel 2 Loop Input
E
Channel 1 Loop Input
E
Channel 2 Loop Input

LMD301, LMD302, and LMD304
Series Operations Manual
Eberle Design Inc. Page 11
Pin
Channel 1 Function
Pin
Channel 2 Function
F
Ch 1 Output Relay N.O. (Collector)
F
Ch 2 Output Relay N.O. (Collector)
G
Ch 1 Output Relay N.C.
G
Ch 2 Output Relay N.C.
H
Earth Ground
H
Earth Ground
I
No Connect
I
No Connect
J
Ch 1 Timer Control (LMD302T)
J
Ch 2 Timer Control (LMD302T)
N.O. is Normally Open, N.C. is Normally Closed.
Relay Contacts are shown with power applied, loops connected and no vehicle present.
Connector mates with MS3106A-18-1S or equivalent.
4.9 LMD304 CONNECTOR PIN ASSIGNMENTS
Pin
Function
A
Neutral (AC-)
B
Ch 4 Output Relay Common (Emitter)
C
Power (AC+)
D
Channel 1 Loop Input
E
Channel 1 Loop Input
F
Channel 2 Loop Input
G
Channel 2 Loop Input
H
Earth Ground
J
Channel 3 Loop Input
K
Channel 3 Loop Input
L
Channel 4 Loop Input
M
Channel 4 Loop Input
N
Ch 1 Output Relay N.O. (Collector)
P
Ch 1 Output Relay Common (Emitter)
R
Ch 2 Output Relay Common (Emitter)
S
Ch 2 Output Relay N.O. (Collector)
T
Ch 3 Output Relay Common (Emitter)
U
Ch 3 Output Relay N.O. (Collector)
V
Ch 4 Output Relay N.O. (Collector)
N.O. is Normally Open, N.C. is Normally Closed.
Relay Contacts are shown with power applied, loops connected and no vehicle present.
Connector mates with MS3106A-2-14S or equivalent.