logika HMD-SM User manual

Scanning Hot Metal Detector
HMD-SM Operator’s Manual
Revision 2.1

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Contents
1. Introduction........................................................................................................................... 2
2. Description........................................................................................................................... 2
2.1 Model Nomenclature ...................................................................................................... 2
2.2 Specifications.................................................................................................................. 3
2.3 Operating Principle ......................................................................................................... 3
2.4 Automatic Threshold Level Adjustment......................................................................... 5
2.5 Other Features................................................................................................................. 5
3. Location and Mounting......................................................................................................... 6
3.1 Sensor Location .............................................................................................................. 6
3.2 Sensor Mounting............................................................................................................. 7
4. Utility Connections .............................................................................................................. 7
4.1 Electrical Connections .................................................................................................... 7
4.2 Cooling Water Connection ............................................................................................. 9
4.3 Purge Air Connection ................................................................................................... 10
5. Operation............................................................................................................................ 10
5.1 Control Panel ................................................................................................................ 10
5.2 Automatic Threshold Level Description....................................................................... 11
5.3 Remote Threshold Sensitivity....................................................................................... 12
5.4 Test Function ................................................................................................................ 13
5.5 Troubleshooting ............................................................................................................ 13
6. Maintenance....................................................................................................................... 14
6.1 Regular Maintenance .................................................................................................... 14
6.2 Returns of the HMD-SM .............................................................................................. 15
7. Accessories- Hot Metal Simulation Test Bar..................................................................... 15
8. HMD-SM Enclosure Dimensions ...................................................................................... 17

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1. Introduction
The Logika Technologies scanning mode hot metal detector, Model HMD-SM, is
designed for the automation of steel, aluminum and other metal mill production lines. It
includes a rugged enclosure, protecting state-of-the-art electronics and will withstand
the harsh ambient conditions present in heavy industrial environments. The HMD-SM is
used to detect hot metal in a range of temperatures, shapes and sizes of wire, bar, strip,
thin plate, thick plate, billet, and slab production facilities.
The scanning mode feature allows the HMD to detect hot metal across the entire width
of a production line. It also enables the HMD to be installed remotely from the hot
metal target, further protecting the electronics and extending the life of the sensor.
2. Description
2.1 Model Nomenclature
HMD - SM - _Scan angle - Power Input__ - R
Base Model Scan angle Power Input R(Relay)
HMD-SM
0: 0 Degree 0: 0 VAC Normal Open
Normal Close
30: 30 Degree 220: 220 VAC
50: 50 Degree 24: 24 VDC
able 1

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2.2 Specifications
Operating temp
No water cooling:
0˚C to +50˚C (32˚F to 20
˚F)
With water cooling: 0˚C to 20˚C (32˚F to 250˚F)
Detect Range
0.2
-
8m
LED Indicators
Green = power on, Red = target detect, Orange= Detector signal
saturation or dirty lens, Off=Alarm
Output
Relay
NO/NC 250VAC
@
A,
or 24VDC
@
A
,
closing: 7.5ms, opening: 3ms
DC 24V PNP,NPN Transistor output: max 00mA
Diagnostic outputs: control, alarm, signal amplitude
Power Input
24 VDC, 0VAC, 220VAC @ 30VA
Cable
6 wires multi
-
conductor TEFLON cable with
9 x 20Ga
and
7 x 24Ga
Insulation 20MΩ, 500VDC, ≥500˚C (930˚F)
Housing
Hermetically sealed cast aluminum enclosure rated IP66, includes cooling
water connections and air purge.
Size
Enclosure;
3 5
mm L x
0
mm
W
x
2
64
mm H (with mounting bracket)
( 2.4”L x 4.3”W x 0.4”H)
Weight
7
kg
or 5 lb
Min arget emp
250
o
C (480
o
F)
S
canning Angle
0˚, 30˚, 50˚
Water Cooling 25
˚ C, 4 bars pressure (60 psi), -2L/min (0.26 to 0.52 USG),
¼” flexible tube
Air Purging 50 to 200 g/cm
2
(0.7 to 2.8 psi), 4- 6L/min (0. 4 to 0.56 cfm)
¼” compression fitting
able 2
2.3 Operating Principle
Detector- The HMD-SM uses a Lead Sulfide (PbS) photocell, which is characterized by a very
strong signal output for the range of infrared energy emitted by steel, compared with other
detector materials. The high signal-to-noise ratio from this detector virtually eliminates
detection errors. Figure 2. shows the various types of photocell spectrums and the
infrared emission spectrum of steel in 250 ˚ C and 000 ˚ C.

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100%
00.25 0.50 0.75 1 1.25 1.50 1.75 2 2.25 2.50 2.75 3 3.25 3.50 3.75
Si Ge PbS
Steel 1000℃
Steel 250℃
Wave length
(μm)
A
Figure 2.1 Spectrum of steel emission and different photocells
Scanning System- The HMD-SM uses a scanning optical bench that enables hot metal
detection across a broad angle of detection. The optical field is scanned using a rotating
drum of multiple mirror facets that reflect the energy from the hot metal target in the
scanning field to the PbS photocell, see Figure 2.2 for details. The infrared energy is
converted to an electronic signal by the PbS photocell, which is then processed by the
electronic circuit and changed to a logic signal for analysis and control purposes.
Figure 2.2: HMD-SM Scanning System
Vertical Scanning field- The HMD-SM is manufactured with one of three vertical field angles
0, 30 and 50 degrees, selected at the time of purchase. This enables the sensor to cover
the entire process area but not scan beyond the process line where interfering sources of
infrared energy may be present.

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Figure 2.3
For example, if
a hot metal target
with a HMD-SM-
30 detector selected
Horizontal Scanning field- A
manual
horizontal measurement angle
Distance”). For example, if
a shutter width angle
distance, the scanning width
is 8mm. A positive output signal will resul
hot metal is within the 8 mm scanning field.
distance
in section 3. for more details.
2.4 Automatic
hreshold Level Adjustment
The HMD-SM includes a
n Automatic
signal when hot metal is detected to prevent detector signal saturation. The user adjusts the
base gain level via a potentiometer mounted on the
and 5.3 for addit
ional details on
signal level upon exit of the hot metal from the scanning detection field. This feature makes
the sensor more stable and significantly reduces detection errors caused by targe
spots or
varying surface temperature as well as
scale.
2.5 Other Features
Fast response time to
the hot metal target in and out of the
Model HMD-SM Operator’s Manual
: 905
-829-5841 Fax: [phone] Email:
[email protected]m
Figure 2.3
HMS - SM Vertical Scanning Field
a hot metal target
is
located 4 meters ( 3’) from the front of the
30 detector selected
, the vertical scanning field is
2. 0 meters
manual
adjustable shutter on the shroud
is used
horizontal measurement angle
change
from to 3 degrees (see Section 3. “Mounting
a shutter width angle
is set at degree
with a 4 meter
is 8mm. A positive output signal will resul
t if any portion of the
hot metal is within the 8 mm scanning field.
For different targets
, see the
in section 3. for more details.
hreshold Level Adjustment
n Automatic
Threshold Level Adjustment to decrease the detector
signal when hot metal is detected to prevent detector signal saturation. The user adjusts the
base gain level via a potentiometer mounted on the
sensor’s control panel (S
ional details on
the
use of this feature). The detector will return to the base
signal level upon exit of the hot metal from the scanning detection field. This feature makes
the sensor more stable and significantly reduces detection errors caused by targe
varying surface temperature as well as
interference from water vapor and oxide
the hot metal target in and out of the
scanning field
Rev 2. Dec-
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located 4 meters ( 3’) from the front of the
HMD
2. 0 meters
or 84 inches.
is used
for the
from to 3 degrees (see Section 3. “Mounting
with a 4 meter
( 3 feet)
t if any portion of the
, see the
mounting
Threshold Level Adjustment to decrease the detector
signal when hot metal is detected to prevent detector signal saturation. The user adjusts the
sensor’s control panel (S
ee Sections 5.2
use of this feature). The detector will return to the base
signal level upon exit of the hot metal from the scanning detection field. This feature makes
the sensor more stable and significantly reduces detection errors caused by targe
t black
interference from water vapor and oxide
scanning field

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Detects low temperature and low emissivity targets in harsh environments; even with
infrared reflection or roller heat radiation interference.
Pulse signal treatment circuit design lessens detector power consumption and temperature
drift.
3. Location and Mounting
3.1 Sensor Location
The ideal location should allow the HMD scanning field to cover the entire process line,
protect it from absorbing excessive heat, and be close enough for the detector to get
sufficient infrared energy from the target.
Mounting Distance- Check the HMD mounting distance listed on table 3 for different
targets. Find the size of the target, select an approximate mounting distance. Use Figure 2.3
for calculating the scanning field and select the ideal scanning angle ( 0
o
, 30
o
, or 50
o
) to
make sure the sensor’s scanning field covers the entire process area. The vertical scanning
field should be oriented across the width of the process line for best coverage.
arget
HMD
Distance
arget
HMD
Distance
Wire rod, 5 - 2 mm 0.2 - 3.0 m Steel Strip 0.6 - 2m
Bar, 0x 0-40x40 mm 0.2 - 4.0 m Thin Plate .0 - 6.0m
Square Billet 0.5 - 6.0 m Thick Plate .0 - 8.0m
Large Billet(Bloom) >2.0 m Slab >2.0m
able 3
Interference- Reduce or eliminate background infrared radiation sources, such as other hot
processes behind the target and reflected sunlight:
. Select the appropriate scanning angle when originally placing order to avoid “over-
scanning”.
2. Gradually reduce the sensitivity adjustment on the HMD-SM’s control panel until the
background interference is not detected (when no target metal is within the scanning field).
See the “Operation” chapter in this manual for additional details.
3. In occasional severe environments, install a heat proof enclosure around the HMD to
protect it from overheating and use ventilation to drive away particulate and vapor.
Other considerations for installation
. Locate the HMD to reduce interfering infrared sources and choose a detection field that
minimizes the presence of dirt, smoke and water vapor or other infrared absorbing
chemicals.
2. Only part of the target needs to be in the sensor’s scanning field to trigger a hot metal
output signal.

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3.2 Sensor Mounting
Mounting Foot- The HMD-SM has an adjustable mounting foot designed to allow easy
rotation through horizontal and vertical axes. The HMD is secured to the mounting foot with
one 8mm bolt and can be installed onto a support bracket. The support must be
sufficiently rigid to absorb any excessive site vibrations that can affect the output of the
detector.
Purge Air, Cooling Water- The HMD-SM has a water-cooling jacket to cool down sensor
temperature and an air-purged shroud for protection of lens; allowing the sensor to be used
in harsh environments with high temperatures, steam, dust and smoke. Please see Section
4.2 Plumbing Connection and Section 4.3 Air-Purge Connection for further details on
installation.
High Heat Option- If the ambient temperature is more than 250
o
C (480
o
F), we recommend
HMD-FOC, Fiber Optical Hot Metal detector. The lens is separate from the detector and
connected by fiber optical cable which can bear high temperatures.
Caution- For installation environments that contains excessive water vapor or smoke,
additional ventilation such as air curtains or fans should be used to clear the area so the
sensor can “see” the hot metal target.
4. Utility Connections
4.1 Electrical Connections
Electrical Overview- All electrical connections (power and signal) to the HMD-SM are made
via a 5 pin male Harting connector, a supplied 2-meter long cable with quick fitting on one
end and terminal pins on the other end for junction box connections. Other cable lengths
are available from Logika Technologies Inc. upon request.
Cable Specification-
•6 conductors cable, color coded, with 9 conductors 20 AWG unshielded (9 x 0.6 mm²), 7
conductors 24 AWG shielded (7 x O.34 mm²)
•Teflon insulation for high temperature applications.
•Outer metallic braided for mechanical protection.
•Overall diameter of 9 mm.
•Minimum bending radius of 30 mm.
Junction Box Wiring- Please see Figure 4. for the sensor wiring diagram. The supplied
cable should be connected directly to the terminals of a junction box. The shield should be
connected to ground to eliminate electrical noise which may trigger false detection signals.
Any unused output wires must have insulation protection or be connected to free terminals
in the junction box.

Power Connections- Power Input (please specify power input at time of order).
See the Figure 4. for detail wirings for different power supply input

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Static ransistor Output-
•PNP: Terminal 4B White, 24VDC on detect, maximum current 00 mA
•NPN: Terminal 4A Black, 0VDC on detect, maximum current 00mA
•Output Response time:
oHMD-SM- 0: ms
oHMD-SM-30: 2ms
oHMD-SM-50: 4ms
Relay Output- Single pole double throw contacts, contact capacity rating 250VAC/ A or
24VDC/ A, relay closes time 7.5ms, relay releases time 3ms.
•Terminal 5C White/Orange: NC, Open = detect
•Terminal 5B White/Blue: NO, Closed = detect
•Terminal 5A White/Purple: COM
Sensor Diagnostics Outputs- Relay and voltage signals to indicate sensor conditions. All the
outputs voltages are referred to 0VDC (Figure 4. , Terminal 3B).
. Control Output (Figure 4. , Terminal 2A Green):
Normal Output: 24VDC
Diagnostic Alarm Output: 0VDC, indicated if one or more occurs:
•Dust or vapor interference on glass
•Target temperature drop
•Signal saturation
2. Alarm Output (Figure 4. , Terminal 4C):
Normal Output: 24VDC
Alarm output: 0VDC indicated if one or more occurs:
•Power input loss
•Scanning motor runs abnormally
•The temperature inside the enclosure is higher than 55
o
C ( 30
o
F)
3. Signal Amplitude Output (Figure 4. , Terminal 3C): 0- 3.5 VDC analog output, proportional
to the photocell output signal. This signal may indicate that the sensor’s protective lens
glass needs to be cleaned or the sensor’s sensitivity needs to be increased. Signal amplitude
output is influenced by:
•Sensor installation environment and location
•Target size
•Target temperature
•Distance between the sensor and the target
•Vapor in the field
•Dust on the Lens
•Sensitivity Adjustment Setting

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After the installation and setup are done, the sensor runs normally. Measure the signal
amplitude output voltage for later maintenance reference.
White/Black
White/Brown
White/Red
White/Yellow
White/Green
Green
Orange
Blue
Brown
Red
White
Black
White/Orange
White/Blue
White/Purple
Yellow/Green
Test
Sensitivity Select
Control
Signal mplitude
0VDC
Remote Sensitivity
larm
PNP
Normal Close
Normal Open
Common
Ground
NPN
220VAC
220VAC220VAC
220VAC
110VAC
110VAC110VAC
110VAC 24VDC
24VDC24VDC
24VDC
+
++
+
-
--
-
Shielding
Figure 4.1: HMD-SM Wiring Diagram
4.2 Cooling Water Connection
Description- When the ambient temperature is higher than 50
o
C ( 20
o
F), cooling water
system is required to protect the electronics inside the enclosure. Two Φ0mm OD barbed
fittings are available beside the electrical connector for cooling water to circulate inside the
enclosure, the direction is not necessary.
Cooling Water Requirements
•Clean industrial water
•Maximum water inlet temperature 25
o
C (77
o
F).
•Maximum water pressure 4 bars (60 PSI)
•Water flow rate of to 2 L/min (0.035 to 0.7 ft
3
/min)
Connection- Use Φ10mm ID or 3/8” ID hose for connections
One fitting is connected to plant’s water supply
The other one is connected to drain
Both fittings should be secured with hose clamps
Setup the cooling water flow rate by Figure 4.2

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
Ambient emperaature
60
80
00
20
40
60
°C
Water
0.3 0.5 .0 .5 2.0 L/M
8 °C
20 °C
25°C
Figure 4.2 Ambient emperature vs. Water Flow Rate
4.3 Purge Air Connection
Description- Compressed plant air can be used to protect the lens from dust and vapor.
Purge air cleans the lens, reduces maintenance times, and prolongs sensor life where dust
or corrosive vapor is present.
Purge Air Requirements
•Must be clean, dry instrument air, no oil, dust and contaminants included. Poor air quality
will result in dirty lens and decrease detector performance. If the quality of compressed air
can’t be guaranteed, it is better not connect it to the sensor to avoid the lens
contaminated and affect the sensor’s performance.
•Air filtration prior to the inlet fitting is recommended to improve the quality of purge air
•Air Pressure range from 50 to 200 g/cm2 (0.7 psi to 2.8 psi)
•Air Flow rate from 4 to 6 L/min (0. 4 to 0.56 ft
3
/min)
 Connection- Connect the plant air source to the purge air barbed fitting on the sensor’s
lens shroud with Φ 0mm ID (or 3/8” ID) hose. Purge air flows out of the sensor shroud
and dissipates into the ambient environment.
5. Operation
5.1 Control Panel
The HMD-SM Sensor’s Control Panel is located at the rear of the enclosure. The following
functions are available on the Control Panel, see Figure 5. .

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LED= Process Status Indicator
Green: No target detected, standby mode.
Red: Target detected.
Orange: Sensor signal saturation or dirty lens.
Off: Alarm
Push Button= Test Button, turns on internal sensor test signal, at the same time activates
visible laser positioning beam for easy target aiming when the button is pressed.
N= Normal Sensitivity Threshold Level Adjustment Potentiometers. When adjust to
maximum sensitivity (7), detect target temperature 400
o
C (752
o
F) or higher.
H= High Sensitivity Threshold Level Adjustment Potentiometers. When adjust to maximum
sensitivity (7), detect target temperature 250
o
C (482
o
F) or higher.
Adjust sensitivity of the detector within each range, to 7 refers low to high
oggle Switch = Sensitivity range selection, N (normal) or H (high), use corresponding
potentiometer for the sensitivity adjustment.
!!!!!Note: Improve the sensitivity may trigger fault detection signal
NH
7
TEST
7
LED
Figure 5.1: HMD-SM Control Panel
5.2 Automatic hreshold Level Description
Definition- The HMD-SM includes an Automatic Threshold Level Adjustment. The sensor’s
built in circuit will automatically adjust the signal output when hot metal enters scanning
field to prevent detect signal from saturation. According to different field applications, base
threshold signal level is determined on installation. Follow “Base Threshold Level
Adjustment Procedure” in this section to setup the right threshold level.

Sensitivity- Flip sensitivity toggle switch to N (or H), Tune the corresponding threshold level
potentiometer clockwise will increase the sensitivity leveled from to 7 in its range. The

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lower the potentiometer setting, the hotter the target should be and the more interfering
background radiation will be eliminated.
N: Normal sensitivity, for steel target temperature higher than 400
o
C (752
o
F)
H: High sensitivity, for steel target temperature from 250
o
C - 400
o
C (480
o
F-750
o
F).
Base hreshold Level Adjustment Procedure
. Align the HMD to the target or put Logika Hot Metal Simulation Test Bar in the HMD-SM’s
scanning field.
2. Normal (N) Sensitivity
•Flip the sensitivity toggle switch to N
•Tune normal threshold level potentiometer to 3 (middle position).
•Adjust the potentiometer until the LED color changes from green to red.
•This is the lowest threshold setting for this application. Turn potentiometer one unit
higher (clockwise) as the operating base threshold level setup.
3. High (H) Sensitivity
•Flip the sensitivity toggle switch toward H
•Tune high threshold level potentiometer to 3 (middle position)
•Adjust the potentiometer until the LED color changes from green to red.
•This is the lowest threshold setting for this application. Turn the potentiometer one
unit higher (clockwise) as the operating base threshold level setup.
4. If the LED does not change from green to red with hot metal in HMD scanning field, first
make sure the sensor is aligned properly and the target metal temperature is over 250
o
C
(480
o
F), then adjust the shutter width in front of the shroud(Section 3.2 Horizontal
Scanning field). The sensor will receive more infrared radiation energy from target. Go back
to the above steps to reset the threshold level.
Caution- After long time operation, the temperature of rollers will increase similarly to the
target temperature. To avoid false signal triggered by hot rollers, the HMD’s scanning field
must be set at the gap between the two rollers.
5.3 Remote hreshold Sensitivity
On the control panel
Turn both POTs to level 1, flip the toggle switch to N
On the control room, use a 10k POT and a toggle switch for remote sensitivity setup.
See Figure 5.2 for detail wirings.

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W h i te / G r e e n
2 B
B lu e
B ro w n
0 K
7
H Clo se-H igh se n s it iv ity
N O p e n -L o w se n sitiv ity
H M D H a rtin g C o n n e cto r
C o n t r o l R o o m
3 B
3 A
S e n s it iv it y
S e n s itiv ity S e le ct
0 V D C
R e m o te Se n sit ivit y
Figure 5.2 HMD Remote Sensitivity Setup and Wiring Diagram
5.4 est Function
To test the electrical integrity of the HMD-SM sensor, follow the steps below:
 Connect power supply to the HMD-SM, make sure the green LED is ON.
 Press and hold the “TEST” button when no target in the scanning field of view.
• The LED turns to red
• The relay clicks
• Pin 4B (white, High=Detect) changes to 24VDC from 0VDC (compare to Pin 3B, Blue)
• Pin 4A (Black, low=Detect) changes to 0VDC from 24VDC (compare to Pin 3B, Blue)
 Release the test button to return to normal operation and end the test function.
Remote test function : See the Figure5.3 for reference, it has the same function as the test
button on control panel.
est White/Yellow
2C
0VDC Blue
3B
HM D Harting Connector Control Room
Push
Button
Figure 5.3 Remote est Function Wiring Diagram
5.5 roubleshooting

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Missed arget- If the HMD doesn’t act normally when a hot metal target is in the scanning
field, there are two possibilities:
. The Horizontal Scanning Angle Shutter located in front of the sensor is closed. Manually
adjust the shutter to allow the target’s infrared energy to reach the detector.
2. The threshold sensitivity potentiometer is set too low. Go to Section 5.2, and recalibrate
the Base Threshold Level.
False Positive arget Detected-
. The base threshold is set too high. Go to Section 5.2, and recalibrate the Base Threshold
Level.
2. If step does not correct false positives, check for background sources of radiation such as
reflected sunlight or hot processes behind the target line. Correct these conditions as
necessary by adjusting the sensor aiming or by blocking the interfering radiation source.
Diagnostic Signal Output Detected- Check the diagnostic signals available and their status
indication (see Section 4. Sensor Diagnostic Outputs for details). Correct fault conditions
as necessary. See additional notes below:
 Control Output terminals 2A/3B output 0VDC- Check that the sensor wiring connections are
correct, that the connections are secure and tight and that the power supply is proper and
normal.
 Alarm Output terminals 4C/3B normally will output a signal of 24VDC. If the output is 0V
following a detected error, the following situation may occur:
. If the housing temperature is over 55
o
C ( 30
o
F), then water cooling must be used (see
section 4.2). If water cooling is already in use, then check the water’s inlet temperature
and clogged water line.
2. If lens and temperature are fine, and alarm is still there. Measure the signal amplitude
output, 0VDC means the Scanning Error (motor error or circuit error). Please contact
Logika Technologies for resolution.
6. Maintenance
6.1 Regular Maintenance
Diagnostics- Usually, the HMD-SM does not need special maintenance. Regular attention to
the following will ensure steady operation of the sensor:
Lens Cleaning- periodically check the HMD-SM sensor’s glass for dust or oil residue, like a
month or 2 months depended on the sensor’s environment and purge air quality. Open the
black lens shroud and clean the glass with alcohol and lens paper or soft cloth.
Detector- Monitor the Signal Amplitude Output (Terminal 3C, Figure 4. ) for the general
conditions of the photocell and optical system.

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Adjustments- The threshold level sensitivity (see Section 5.2) and the shutter may require
adjustment if conditions are changed.
6.2 Returns of the HMD-SM
Contact us at 1-888-856-4452 (1-888-8LOGIKA) with the Serial Number of your HMD-
SM before you return our product. If the problem cannot be resolved by telephone or email,
we will provide you with a return authorization number.
Please return to: Logika Technologies Inc.
2-2857 Sherwood Heights Drive,
Oakville, ON, L6J 7J9
Canada
Do not return the HMD-SM without a return authorization number. If the product is out of
warranty, we will provide a repair estimate and then complete the repairs upon your approval.
7. Accessories- Hot Metal Simulation est Bar
 In order to facilitate the installation, use and maintenance of HMD-SM hot metal detector
and other infrared sensors, Logika has developed a hot metal simulation test bar, Model TP-
. This process simulation tool uses an AC power supply of 0/220V with the maximum
power of 500 W. The power output can be adjusted by the potentiometer on the test bar to
simulate different process temperatures.
 When using the TP- test bar, please note the following:
• The power supply should be supplied with a ground.
• The test bar is made of sensitive electronic components. Use care when handling the unit.
• Maximum one hour continuous usage, turn the power off when it is not used.
• The tungsten lamp tube can be replaced if it is burnt.

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Figure 7.1: Hot Metal Simulation est Bar Drawing

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8. HMD-SM Enclosure Dimensions
All units are in mm
Figure 8.1: HMD-SM Enclosure Side View

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Figure 8.2: HMD-SM Enclosure front View
Figure 8.3: HMD-SM Enclosure top View

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Figure 8.2: Junction Box Dimension