Engineering Information

ROHS INFO

All Enclosures are RoHS compliant.

EMI

Electromagnetic Interference (E.M.I.) is electronic pollution which is caused by rapidly changing voltage. It can cause computational errors or wipe out complete memories, much like electrostatic discharge (E.S.D.), if allowed to penetrate sensitive electronic components. The Serpac E.M.I. enclosure will offer a higher degree of protection than any paired surface. We recommend that all end manufactures conduct open field measurement tests.

EMI

IZOD IMPACT TEST

For a part to resist a particular blow without failure two conditions must be met: The part must absorb the total Kinetic energy of the blow, that is, the striker must be brought to zero velocity and then rebound. The stresses developed within the part must not exceed the fracture strength of the material.

IZOD IMPACT TEST

FLAMMABILITY OPTIONS

Flammability tests cannot and do not measure material performance in a fire. U.L. standard 94 defines two types of test. These tests lead to essentially six levels of ratings.

Depending on your final use and environment of operation it is likely a U.L. standard will need to be met. Serpac can provide a custom material and certification for your needs.

FLAMMABILITY OPTIONS

ABS(MSDS), Polycarbonate, Rubber, Polypropylene, Acetyl, Polyester, KJW (ABS), EMI (ABS), Stat-Kon (Polycarbonate)

The IP Standard

International Standard IEC 60529 outlines an international classification system that describes the sealing characteristics of electrical equipment. The classification system defines the level of protection provided by enclosures to prevent the ingress of foreign objects and moisture into the electrical equipment. The classification system uses the "IP" code, or "Ingress Protection" code, to define the level of seal. The IP code uses a system of two numerical digits to define the level of both foreign object and moisture protection. Although the IP classification is primarily used for establishing the level of seal in electrical equipment, it is adapted herein for determining the level of seal in passive electrical components.

1st Digit, Foreign Bodies - Degrees of Protection

The first digit of the IP code indicates the degree of protection against solid foreign objects from entering the electrical device. The table below outlines the level of protection against foreign objects for each level.

Description of Protection Level

0 = Not protected

1 = Protected against solid foreign objects of 50 mm diameter and greater

2 = Protected against solid foreign objects of 12,5 mm diameter and greater

3 = Protected against solid foreign objects of 2,5 mm diameter and greater

4 = Protected against solid foreign objects of 1,0 mm diameter and greater

5 = Protected from the amount of dust that would interfere with normal operation

6 = Dust tight

2nd Digit, Moisture - Degrees of Protection

The second digit of the IP code indicates the degree of protection against the ingress of various forms of moisture (e.g. drip, spray, submersion, etc.) into the component. Tests to determine the level of protection are carried out with fresh water and do not take into account the use of solvents.

Description of Protection Level

0 = Not protected

1 = Protected against vertically falling water drops

2 = Protected against vertically falling water drops when enclosure is tilted up to 15°

3 = Protected against water sprayed at an angle up to 60° on either side of the vertical

4 = Protected against water splashed against the component from any direction

5 = Protected against water projected in jets from any direction

6 = Protected against water projected in powerful jets from any direction

7 = Protected against temporary immersion in water

8 = Protected against continuous immersion in water, or as specified by the user

NEMA Standard

What does a NEMA 4 rating mean? In non-hazardous locations, there are several different NEMA ratings for specific enclosure "types", their applications, and the environmental conditions they are designed to protect against, when completely and properly installed.. The following provides an overview of the NEMA Types. For complete definitions, descriptions, and test criteria, see the National Electrical Manufacturers Association (NEMA) Standards Publication No. 250.

NEMA 1 - Enclosures constructed for indoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment and to provide a degree of protection against falling dirt.

NEMA 2 - Same as NEMA 1 including protection against dripping and light splashing of liquids.

NEMA 3 - Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt, rain, sleet, snow, and windblown dust; and that will be undamaged by the external formation of ice on the enclosure.

NEMA 3R - Same as NEMA 3 excluding protection against windblown dust.

NEMA 3S - Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt, rain, sleet, snow, and windblown dust; and in which the external mechanism(s) remain operable when ice laden.

NEMA 4 - Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt, rain, sleet, snow, windblown dust, splashing water, and hose-directed water; and that will be undamaged by the external formation of ice on the enclosure.

NEMA 4X - Same as NEMA 4 including protection against corrosion.

NEMA 5 - Enclosures constructed for indoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt; against settling airborne dust, lint, fibers, and flyings; and to provide a degree of protection against dripping and light splashing of liquids.

NEMA 6 - Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt; against hose-directed water and the entry of water during occasional temporary submersion at a limited depth; and that will be undamaged by the external formation of ice on the enclosure.

NEMA 6P - Same as NEMA 6 including protection against the entry of water during prolonged submersion at a limited depth.

NEMA 7 - Enclosures are for indoor use in locations classified as Class I, Groups A, B, C, or D and shall be capable of withstanding the pressures resulting from an internal explosion of specified gases, and contain such an explosion sufficiently that an explosive gas-air mixture existing in the atmosphere surrounding the enclosure will not be ignited. Enclosed heat generating devices shall not cause external surfaces to reach temperatures capable of igniting explosive gas-air mixtures in the surrounding atmosphere. Enclosures shall meet explosion, hydro-static, and temperature design tests.

NEMA 9 - Enclosures are intended for indoor use in locations classified as Class II, Groups E, F, or G, and shall be capable of preventing the entrance of dust. Enclosed heat generating devices shall not cause external surfaces to reach temperatures capable of igniting or discoloring dust on the enclosure or igniting dust-air mixtures in the surrounding atmosphere. Enclosures shall meet dust penetration and temperature design tests, and aging of gaskets (if used).

NEMA 12 - Enclosures constructed (without knockouts) for indoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt; against circulating dust, lint, fibers, and flyings; and against dripping and light splashing of liquids.

NEMA 12K - Same as NEMA 12 including enclosures constructed with knockouts.

NEMA 13 - Enclosures constructed for indoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt; against circulating dust, lint, fibers, and flyings; and against the spraying, splashing, and seepage of water, oil, and non-corrosive coolants.

UL flammability information

UL Flame Rating - UL 94 (ratings refers to material properties)

UL flame ratings group materials into categories based on their flammability. UL 94 covers two types of testing: vertical burn and horizontal burn.

Horizontal Testing (HB)

Procedure: A specimen is supported in a horizontal position and is tilted at 45°. A flame is applied to the end of the specimen for 30 seconds or until the flame reaches the 1 inch mark. If the specimen continues to burn after the removal of the flame, the time for the specimen to burn between the 1 and 4 inch marks are recorded. If the specimen stops burning before the flame spreads to the 4 inch mark, the time of combustion and damaged length between the two marks is recorded. Three specimens are tested for each thickness.

UL

Horizontal Flame Test

Horizontal Rating: HB

Requirements:

  • Specimens must not have a burning rate greater than 1.5 inches/minute for thicknesses between 0.120 and 0.500 inches and 3 inches/minute for thicknesses less than 0.120 inches.
  • Specimens must stop burning before the flame reaches the 4 inch mark.

Vertical Testing (V-0, V-1, V-2)

Procedure: A specimen is supported in a vertical position and a flame is applied to the bottom of the specimen. The flame is applied for ten seconds and then removed until flaming stops at which time the flame is reapplied for another ten seconds and then removed. Two sets of five specimens are tested. The two sets are conditioned under different conditions.

UL

Vertical Flame Test

Vertical Ratings: V-0

Requirements:

  • Specimens must not burn with flaming combustion for more than 10 seconds after either test flame application.
  • Total flaming combustion time must not exceed 50 seconds for each set of 5 specimens.
  • Specimens must not burn with flaming or glowing combustion up to the specimen holding clamp.
  • Specimens must not drip flaming particles that ignite the cotton.
  • No specimen can have glowing combustion remain for longer than 30 seconds after removal of the test flame.

Vertical Ratings: V-1

Requirements:

  • Specimens must not burn with flaming combustion for more than 30 seconds after either test flame application.
  • Total flaming combustion time must not exceed 250 seconds for each set of 5 specimens.
  • Specimens must not burn with flaming or glowing combustion up to the specimen holding clamp.
  • Specimens must not drip flaming particles that ignite the cotton.
  • No specimen can have glowing combustion remain for longer than 60 seconds after removal of the test flame.

Vertical Ratings: V-2

Requirements:

  • Specimens must not burn with flaming combustion for more than 30 seconds after either test flame application.
  • Total flaming combustion time must not exceed 250 seconds for each set of 5 specimens.
  • Specimens must not burn with flaming or glowing combustion up to the specimen holding clamp.
  • Specimens can drip flaming particles that ignite the cotton.
  • No specimen can have glowing combustion remain for longer than 60 seconds after removal of the test flame.

Vertical Testing (5V, 5V-A, 5V-B)

Testing is done on both bar and plaque specimens. Procedure for Bars: A bar specimen is supported in a vertical position and a flame is applied to one of the lower corners of the specimen at a 20° angle. The flame is applied for 5 seconds and is removed for 5 seconds. The flame application and removal is repeated five times. Procedure for Plaques: The procedure for plaques is the same as for bars except that the plaque specimen is mounted horizontally and a flame is applied to the center of the lower surface of the plaque.

UL

Vertical Flame (5V Type) Test

Vertical Rating: 5V

Requirements:

  • Specimens must hot have any flaming or glowing combustion for more than 60 seconds after the five flame applications.
  • Specimens must not drip.
  • Specimens must not be destroyed in the area of the flame.

Vertical Ratings: 5V-A

Requirements:

  • Specimens must hot have any flaming or glowing combustion for more than 60 seconds after the five flame applications.
  • Specimens must not drip flaming particles that ignite the cotton.
  • Plaque specimens must not exhibit burnthrough (a hole).

Vertical Ratings: 5V-B

Requirements:

  • Specimens must hot have any flaming or glowing combustion for more than 60 seconds after the five flame applications.
  • Specimens must not drip flaming particles that ignite the cotton.
  • Plaque specimens may exhibit burn through (a hole).

Torque Recommendations

Maximum recommended torque

(Inch-ounces)

PCB = Circuit board bosses

Series Main Body Screws Other Screws
A-series (PN 6006)64** (PN 6013) PCB36**
C-series (PN 6002) C2 48**
(PN 6003) C4 48**
(PN 6008) C6 48**
(PN 6007)
C8, C9, C10, C12, C28
48**
NA
CA-series (PN 6002) CA4 32**
(PN 6008) CA6, CA8 48**
(PN 6008) CA10 32**
NA
CH-series (PN 6003) CH4 48**
(PN 6008) CH6 48**
(PN 6007) CH8 48**
NA
G-series NA (PN 6004) PCB 48**
H-series (PN 6003) 48** (PN 6004) PCB 48**
I-series (PN 6031) machine screws 128†
(PN 6028) Flange/Feet 112†
(PN 6029) Panels 112†
M-series M4 (PN 6001) 10*
M6, M8 (PN 6003) 48**
P-series (PN 6036, 6041) 48†
Faceplate (PN 6008) 48†
(PN 6004) PCB 48**
RB-series (PN 6023 & PN 6032) 48*** (PN 6022) PCB 48**
S-series (PN 6005) 64**
110i (PN 6013) 48**
S-series with PS (PN 6005) 40**
S-series clear top with PS (PN 6005) 76**
(PN 6004) PCB 48**
S-series xxxR (all) (PN 6016 to 6020) 32** (PN 6004) PCB 48**
SL-series (all) (PN 6005) 64**
05S (PN 6013) short side 40**
15S (PN 6013) short side 40**
WM05S (PN 6013) short side 40**
(PN 6004) PCB 48**
WM-series (PN 6005) 64** (PN 6004) PCB 48**
WM-series with PS (PN 6005) 40**
WM-series clear top with PS (PN 6005) 96**
WM-series xxxR (all) (PN 6016 to 6020)32**
Protective Cases (PN 6026) for panels64**

* #0 Philips drive is recommended.

** #1 Philips drive is recommended.

*** T10 Torx drive is recommended.

† #2 Philips drive is recommended.

EMI Shielding

Features

SERPAC enclosures can be customized to shield Electromagnetic Interference (EMI). SERPAC offers two different methods for shielding:

Spray method

Our most common method for custom orders is to spray the interior of the enclosure with a conductive paint. Enclosures can be sprayed with a nickel based paint.

There are no minimum quantities required, but a set-up fee will be applied.

Molded method

The second method for shielding is to mold enclosures in a conductive plastic (black only).

EMI enclosures are available as special order parts.

Orders of a 1000 pieces or more will not incur a setup charge.

UL

Optional End Panels For A-Series, M-Series & H-Series

End Panels are available in Deep Violet for infrared transmission, Clear and Transparent Red.

Clear And Transparent Red
Panel Characteristics

Dielectric Strength: 85 KV/mil

Continuous operating temperature: -50°C (-58°F) to 74°C (165°F)

Dielectric Strength: 85 KV/mil

End Panel Thickness

For all IR, CL & TRANSPARENT

A-Series All A-Series end panels are .0601(1.52) except A-42 which is .125(3.18).

H-Series All H-Series end panels are .045(1.14).

M-Series All M-Series end panels are .065(1.65).

End Panel Thickness

Infrared Panel Characteristics

Dielectric Strength: 380 V/mil

Continuous operating temperature: -129°C (-200°F) to 276°C (310°F)

Infrared Panel Characteristics

Drop test

Units were loaded with weights (see list below) and dropped at different angles from a 6’-10” platform onto a concrete surface. Cases maintained their watertight integrity and remained closed. A small percentage (<10%) sustained broken tall rib.

Tests were successful.

UNIT WEIGHT
120 2.0 lbs
300 4.9 lbs
520 15.7 lbs
710 20.0 lbs
720 35.0 lbs
920 35.0 lbs
1220 35.0 lbs

Impact test

(920 and 1220 not yet tested) This test was performed by dropping a 4.5 lb cylindrical piece of steel onto the center of the top and then onto the bottom of each case from a height of 6’. The test was performed three times on each surface. No material failure or cracks were found.

Handle test

(920 and 1220 not yet tested) Repetitive impact test. 15 lbs of weight was added to each case. Cases were then hung by their handle and given “jolt” tests. Every 6 seconds, for 48 hours the cycle machine lifted and dropped each case. Neither the handle, the handle pin nor the case itself showed any signs of stress.

Weight test

(920 and 1220 not yet tested) Cases were loaded with 75 lbs of steel, and hung by their handle for 60 hours. No stress marks were found in handle, pin, latches, hinges or any component of the case.

Instructions For Customizing Foam Inserts

Accuform Foam

All Serpac cases may be purchased with a foam set. The lid has egg crate foam the bottom has a shock absorbing Accuform Foam. The Accuform Foam is a block of vertically pre-scored high-density foam that can be easily "plucked" to provide a snug fit, for individual equipment and accessories. This will protect your stored equipment from the abuse of even your roughest adventure.

For best results, please read the following text in its entirety before altering the foam. Although not necessary or required, here are some tools and items you may want to have available when setting up your foam:

  • White chalk or Marker
  • Long scissors
  • Hobby knife

Layout

  1. Determine the dimensions of the object you wish to set into the foam. The dimensions that should be considered are size, shape and weight.
  2. Place the object(s) on top of the foam to get an idea of how you are going to lay it out. Often times you may want to set several items in your case, so this is a good first step to determine where everything will be located. Try different configurations for best fit and protection.
  3. Place larger and heavier objects towards the hinges and the smaller lightweight objects closer to the latches. Notice how much the object is depressing the foam under its own weight and keep this in mind to allow enough foam thickness between objects and case walls. The heavier or more sensitive the object is, the more foam you will want surrounding it for maximum protection.
  4. Keep your case well balanced by placing heavy objects towards the center and surround it with lighter items. Remember that your case will be turned in all directions when traveling and especially while being handled by others.

 

Marking your pattern

You may now mark your foam by tracing your objects with white chalk or black marker. Remember that the foam will "give" considerably, so if using a marker a smaller tip is better. We recommend using the chalk method for round, curved or unevenly shaped objects. Chalk marks can later be removed with a damp cloth or the foam may be flipped over when removing foam all the way through.

Cutting and Plucking

Remove all your objects from the foam surface and determine how you want to make the vertical holes for your objects.

  • THICK OBJECTS - If your object is very thick you may not need to worry about plucking or cutting. You may carefully remove the entire square inside of the pattern you have marked.
  • Thin Objects - Thin objects can easily be fitted into the foam by separating the score marks to the length of an object and forming a slot. The object can then be pushed into this slot without removing any of the foam.
  • SOFT CORNERS OR UNEVENLY SHAPED OBJECTS - Adapt the above method for shaping the foam to round, curved or unevenly shaped objects. The foam is pre-scored, so better results can be achieved by using a hobby knife with a long thin blade. A surgical scalpel facilitates this process by cleanly slicing the foam, creating nice square edges for your cutouts. In other words, the sharper your cutting instrument, the cleaner your results.
  • SQUARE/HARD EDGED OBJECTS - The easiest method when working with square or rectangular objects is to simply break the score line all the way through the foam and remove the block you have just created. You can now use scissors to cut this block for placing into your foam hole as an insert to add further protection on the bottom side of your object. Determine the thickness of your objects in relation to the foam and case depth before cutting this small block. This method will yield a very clean-cut hole. You can also just find the depth at which to remove the foam and simply pluck the foam out with your fingers. Although effective, this method does not leave a very flat or even surface.
  • OBJECTS WITH HARD CORNERS - Another approach is to gently press your object into the foam at its chosen location to reveal the pre-scored lines (then run either a blade or even your finger along side your object, tracing it to separate the score breaks a short distance down). The foam will separate easily during this step. This method works best with square or rectangular shaped objects.

We hope you found this helpful in getting your case set up to protect your valuable equipment. If you find other alternatives when working with the foam or applications for our cases, we would appreciate your comments. Contact us at: sales@serpac.com

How To Remove A Wheel Pin

Using a No. 29 (.136”) drill
1- Using a No. 29 (.136”) drill
Drill a hole about 3/4” deep in the center of the existing wheel pin
2- Drill a hole about 3/4” deep in the center of the existing wheel pin
Insert a #8 X 1 5/8” Phillips Self-Tapping screw into the drilled hole
3- Insert a #8 X 1 5/8” Phillips Self-Tapping screw into the drilled hole
Using a Phillips tip #2 bit
4- Using a Phillips tip #2 bit
Drive the screw 1/2
5- Drive the screw 1/2"- 3/4” into the drilled hole
Firmly grip the screw with vise-grip pliers
6- Firmly grip the screw with vise-grip pliers
While pushing down on case, pull up on vise grips
7- While pushing down on case, pull up on vise grips
The pin should begin to pull out
8- The pin should begin to pull out
Remove old pin and discard
9- Remove old pin and discard
Insert new pin (pn. 7047) and tap into place taking care to not damage the case
10- Insert new pin (pn. 7047) and tap into place taking care to not damage the case

How To Remove A Latch Pin

Locate the tip
1- Locate the tip of a #4 X 5/8" self tapping AB point screw in the center of the latch pin to be removed.
Hammer in the screw tip
2- Hammer in the screw tip to start the screw digging into the center of latch pin.
With the screw driver
3- With the screw driver (tip #2 or smaller), applying pressure insert the screw into the center of the pin (4 to 5 full turns should be enough). If you go too far unscrew it enough to fit a pair of pliers between case and screw head.
sing a pair of pliers
4- Using a pair of pliers as a lever, grip the screw and pry down against the case to move the screw up to start removing the pin.
Using the pliers pull out the latch pin
5- Using the pliers pull out the latch pin.
With the screw driver
6- The pin is now removed.