Sumimark III Print System – Support Notice

May 6th, 2015

For 30 years Sumitomo Electric Interconnect Products, Inc. has provided the highest quality interconnect products for critical applications. During this time we have adapted to numerous technological advancements which have ultimately helped our customers. Such a time has come again.

This announcement is being provided to you as notification Sumitomo Electric (San Marcos, CA.) will cease hardware support for the SumiMark III Marking System effective June 1, 2015. Sumitomo will continue to offer consumable items such as print heads, cutter blades, cutter blocks and ribbons for the near future. To ensure you are able to continue enjoying all the benefits of SumiMark products, we encourage you to upgrade to the latest SumiMark IV 300 DPI Marking System. The SumiMark IV 300 DPI utilizes the same consumable items as the SumiMark III, but has significant improvements such as USB and Ethernet interfaces, network printing capabilities. It also is delivered stock with the new Sumilabel software which offers much greater flexibility than the SumiMark 6.0 software. The SumiMark IV 300 DPI also features many mechanical upgrades which provide an easier, faster and quieter operation – all in a compact frame!

To view a SumiMark IV 300 DPI Marking System data sheet, please click here. 

For a comparison of the SumiMark IV 300 DPI and SumiMark III, please click here

If you need further assistance in identifying which SumiMark products are best suited to your individual applications, please contact us at:
Phone: 775.356.8969
We would be happy to help with any printable tubing application you might have!

Captain!.. Activate the force SHIELD!


(Ex: Low Loss Coaxial Cable with a braid, foil, and a flat braid)

In environments where electrical noise is a factor. A Shielded cable is needed to prevent interference. Electromagnetic interference (EMI), whether it be radiated or conducted, can seriously disrupt the proper operation of other equipment. Jacket insulation protects a cable mechanically from scraps and abrasion and environmentally from moisture and spills, but insulation is transparent to electromagnetic energy and offers no protection. This is when shielding is needed to combat the effects of Electromagnetic interference.

In most cases, cables can be a main source of transfer for EMI, both as a source and receiver. As a source, the cable can either conduct noise to other equipment or act as an antenna radiating noise. As a receiver, the cable can pick up EMI radiated from other sources. A shield works on both.

The table below has basic rules as to the areas that are subject to these noise levels. Notice that switching heavy loads, inductive heaters, large transformers can all present high levels of both conducted and radiated EMI.

Placing signal cables next to power cables can also allow power-line noise to couple onto the signal lines.

Noise Level Noise Source Wire Specification
High Electrolytic processes, heavy motors, generators, transformers, induction heating, relay controls, power lines and control wire in close proximity Heavy processing plants such as steel mills and foundries
Medium Wiring near medium-sized motors, control relays Average manufacturing plants
Low Wiring located far from power lines, motors; motors <5 hp; no induction heating, arcs, control or power relays nearby Storage areas, labs, offices and light assembly operations

The primary way to combat EMI in cables is through the use of shielding. The shield surrounds the inner signal- or power-carrying conductors. The shield can act on EMI in two ways. First, it can reflect the energy. Second, it can pick up the noise and conduct it to ground. In either case, the EMI does not reach the conductors. In either case, some energy still passes through the shield, but it is so highly attenuated that it does not cause interference.

Cables come with various degrees of shielding and offer varying degrees of shielding effectiveness. The amount of shielding required depends on several factors, including the electrical environment in which the cable is used, the cost of the cable—why pay for more shielding than you need?—and issues like cable diameter, weight, and flexibility.

An un-shielded cable for industrial applications typically is used in a controlled environment— inside a metal cabinet or a conduit, where it is protected from ambient EMI. The metal of the enclosure shields the electronics inside.

A shield will reflect some energy, conduct some energy to ground, and pass some energy. There are two types of shielding typically used for cables: foil or braid.

  1. Foil shielding used a thin layer of aluminum, typically attached to a carrier such as polyester to add strength and ruggedness. It provides 100% coverage of the conductors it surrounds, which is good. It is thin, which makes it harder to work with, especially when applying a connector. Usually, rather than attempting to ground the entire shield, the drain wire is used to terminate and ground the shield. The drawback to foil is that is may not be as flexible as the braid shield.
  2. A braid is a woven mesh of bare, tinned copper, or silver plated copper wire strands. The braid provides a low-resistance path to ground and is much easier to termination by crimping or soldering when attaching a connector. But braided shields do not provide 100% coverage. They allow small gaps in coverage. Depending on the tightness of the weave, braids typically provide between 70% and 95% coverage. When the cable is stationary, 70% is usually sufficient. In fact, you won’t see an increase in shielding effectiveness with higher percentages of coverage. Because copper has higher conductivity than aluminum and the braid has more bulk for conducting noise, the braid is more effective as a shield. But it adds size and cost to the cable.

For very noisy environments, multiple shielding layers are often used. Most common is using both a foil and a braid. In multi-conductor cables, individual pairs are sometimes shielded with foil to provide cross-talk protection between the pairs, while the overall cable is shielded with foil, braid, or both. Cables also use two layers of foil or braid.

In practice, the purpose the shield is to conduct to ground any of the noise it has picked up. The importance of this cannot be overstated—and failure to understand the implications can mean ineffective shielding. The cable shielding and its termination must provide a low-impedance path to ground. A shielded cable that is not grounded does not work effectively. Any disruptions in the path can raise the impedance and lower the shielding effectiveness.

Practical Guidelines for Effective Shielding

  1. There must be the proper amount of shielding required for the application. In moderately noisy environments, a foil alone may provide adequate protection. In noisier environments, consider braids or foil-braid combinations.
  2. Make sure the cable fits the application, not the other way around. Mainly in situations such as robotics, cables that experience repeated flexing usually can be built with a spirally wrapped shield rather than a braid. in these situations, be sure to avoid foil shielding as the flexing could tear the foil shield.
  3. Confirm the equipment that the cable is connected to is properly grounded. Use an earth ground wherever possible and check the connection between the ground point and the equipment. Eliminating noise depends on a low resistance path to ground.
  4. Most connector designs allow full 360° termination of the shield. Make sure the connector offers shielding effectiveness equal to that of the cable. For example, many common connectors are offered with metal-coated plastic, cast zinc, or aluminum back shells. Complimenting the connector and/or cable with each other will ensure that you have proper shield performance throughout your harness or assembly.
  5. Ground the cable at the minimum on one end. This eliminates the potential for noise inducing ground loops. A shielded system is only as good as its weakest component. A high-quality cable is defeated by a low-quality connector. Similarly, a great connector can’t do anything to improve a poor cable.

If you have any questions please feel free to call or email us.

Phone: 775-356-8969


MIL-DTL-55021D simplified


(Example of a three conductor, M55021 Cable)

M55021 cable is military rated cable intended for use in the wiring of electrical equipment and components.

Recently being adopted by NEMA under the ANSI/NEMA WC 55021-2013 standard, M55021 cable was most commonly referred to as the MIL-DTL-55021 specification. The specification can still be found at the DLA website along with it’s most recent revisions.

The jacket materials called out in the M55021 spec decide the operating temperature of the cable itself. For example, PVC (Polyvinylchloride) ranges from -40°C to 105°C operating temp. Where the Fluoropolymer jacket types FEP (Fluorinated ethylene propylene) and PTFE (Polytetrafluoroethylene) range for -65°C to 200 °C temp rating.

An example of our the part number sequence for the M55021 specification is constructed is as follows:

Part number: B24C904-903-902P


The part number components are all defined per the specification:

  • Wire Type – This is the base wire used in building the cable. The base components are built using M16878 specs (or newer NEMA HP3 standards). Please contact us for specification details or questions you might have.

The letters that designate the base wire used are:

Letter Wire Specification Letter Wire Specification
B M16878/1 (NEMA HP7)  105°C EE M16878/5 (NEMA HP3)    200°C
C M16878/2 (NEMA HP7)  105°C BJ M16878/17 (NEMA HP7)  105°C
D M16878/3 (NEMA HP7)  105°C CJ M16878/18 (NEMA HP7)  105°C
E M16878/4 (NEMA HP3)  200°C DJ M16878/19 (NEMA HP7)  105°C
  • Conductor Size – This is the AWG size identifier of the wires used to build the cable. This table shows the conductor sizes and stranding available for M55021:
Conductor Size Stranding
26 AWG  to 30 AWG 7 Strands
12 AWG to 24 AWG 19 Strands
10 AWG 37 Strands
  • Conductor Material – This letter signifies the conductor metal in the base wires of the cable:
    • C”  =  Copper
    • S”  =  Copper Clad Steel (CCS)
    • H”  =  High Strength Copper Alloy (HSCA)
  • Wire Colors  – Wire colors consist of one to three numerals. The first number is always the base color. The second and third numbers (If present), represent stripes (Example: “926” – This would be white with red and blue stripes). The color chart below represents all of the colors used. This can also be found in Table 1 of MIL-STD-681F. The most common color codes are White (Single Conductor), White/Black (Two Conductors Twisted), and White/Black/Red (Three Wires twisted).
Code Color Code Color
0 Black 5 Green
1 Brown 6 Blue
2 Red 7 Violet
3 Orange 8 Gray
4 Yellow 9 White
  • Covering over Component Wires – The covering is the shield (If present) and and insulation jacket over the cable. All M55021 shields are made using a braid of the same materials used on the inner wires. The covering over component wires must be identified in the part number by using one of the following letter configurations below:
Letter   Covering  Letter    Covering
U No Shield or Jacket S Shielded, No jacket
P PVC (Polyvinylchloride) Jacket SP Shielded, Extruded PVC Jacket
F FEP (Fluorinated Ethylene Propylene) Jacket SF Shielded, Extruded FEP Jacket
J Polyamide Jacket SJ Shielded, Polyamide Jacket
T PTFE (Polytetrafluoroethylene) Jacket STW Shielded, Wrapped PTFE Jacket
STX Shielded, Extruded PTFE Jacket

Thank you for taking a moment to review our brief description of the M55021 specification. If you have any questions please feel free to contact us.

Phone: (775) 356-8969