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1500 Watts

Full Brick DC/DC Converter Single Output 2/1/2018 Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 1 of 10

FEATURES

  • Wide Input Range
  • Industry Standard Full Brick Package
  • High Reliability
  • High Efficiency
  • High Power Density
  • Low Ripple and Noise
  • Over Current, Over Voltage, Over Temperature, and Short Circuit Protection
  • Input Under & Over Voltage Protection
  • RoHS5 Compliant
  • UL/IEC/EN60950/GB4943 Compliant APPLICATIONS DESCRIPTION
  • Radar
  • Defense
  • Industrial Control
  • High Reliability Electronic Equipment The DCHPW1500-450S28 model of DC/DC converters offers up to 1500 watts of output power in a 3.90” x 2.4” x 0.55” full brick package. This is a single output model with a wide input range as well as high reliability, efficiency and power density. This model also has protection against over current, over voltage, over temperature, short circuit, and input under and over voltage conditions. The DCHPW1500-450S28 model is RoHS5 and UL/IEC/EN60950/GB4943 compliant. Please note that this is a preliminary publication. Size: 3.90in x 2.4in x 0.55in (99.1mm x 61mm x 13.9mm) SPECIFICATIONS All specifications are based on 25°C Case Temperature, Nominal Input Voltage, Nominal Output Voltage, and Full Load unless otherwise noted. We reserve the right to change specifications based on technological advances. SPECIFICATION TEST CONDITIONS Min Typ Max Unit INPUT SPECIFICATIONS Input Voltage Range 200 450 750 VDC Operating Voltage Absolute Maximum Rating, Continuous 750 VDC Max. Input Current Vin=200VDC, Po=1500W 8.5 A No Load Input Current Vin=450VDC, Vout=28VDC, Io=0A 65 85 mA Non-Operating Input Absolute Maximum Rating, Continuous -0.3 800 VDC Inrush Current (I2t)(1) Vin=450VDC 5 A2s Input Reflected Ripple Current Vin=450, Vout=28VDC, Io=54A (See Fig. 3) 200 400 mA External Input Capacitor Low ESR electrolytic capacitor with voltage ≥900VDC(2) 47 100 µF Input Fuse Fast Blow Fuse-Link 15 A Under Voltage Lockout Io=27A Turn-On 170 180 190 VDC Turn-Off 108 190 200 Hysteresis 10 Over Voltage Lockout Io=27A Turn-On 760 770 780 VDC Turn-Off 750 760 770 Hysteresis 10 OUTPUT SPECIFICATIONS Nominal Output Voltage Vin=450VDC, Io=27A 27.72 28 28.28 VDC Nominal Output Voltage Range Vin=200-750VDC, Io=0-54A, Tc=-40ºC - +100ºC 27.16 28 28.84 VDC Auxiliary Output Voltage Output Current: 0-20 10.0 11.5 13.0 VDC Voltage Accuracy Vin=200-750VDC, Io=0-54A ±1 % Accuracy (Ii/Ie-ΣI/nIe) Vout=28VDC, Io=27-54A ±5 ±10 % Line Regulation Vin=200-750VDC, Io=54A ±0.20 % Load Regulation Vin=200-750VDC, Io=0-54A ±0.50 % Voltage Trim See Application Notes for Voltage Trim -10 +10 % Output Power Iomax=54A, See Application Notes for Voltage Trim 1500 W Output Current Range Pomax=1500W, See Application Notes for Voltage Trim 0 54 A Auxiliary Output Current 20 mA Ishare Voltage Reference Vout=28VDC, Io=54A 4.75 5.00 5.25 VDC Output External Capacitor See Application Notes for Typical Application Circuit 2000 4000 µF Output Capacitive Load Resistive (CR) mode 30000 µF Ripple & Noise Vin=650-750VDC, Load 5.4A-54A 70 150 mV Output Voltage Rise Time 10%Vo_set to 90%Vo_set 7.5 15 ms Start-Up Delay(3) 500 2000 ms Output Voltage Overshoot during Turn On/Off 5 %Vout Transient Response(4) 1000 1500 mV 300 500 µs Temperature Coefficient Tc=-40~+100ºC ±0.02 %/ºC

Full Brick DC/DC Converter Single Output 2/1/2018 Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 2 of 10 SPECIFICATIONS All specifications are based on 25°C Case Temperature, Nominal Input Voltage, Nominal Output Voltage, and Full Load unless otherwise noted. We reserve the right to change specifications based on technological advances. SPECIFICATION TEST CONDITIONS Min Typ Max Unit REMOTE ON/OFF CONTROL Logic High Logic High, Module Off 2.4 18.0 VDC Logic Low Open Circuit or Low Logic, Module On -1.0 0.8 VDC Current 6 mA ON/OFF (+) to ON/OFF (-) Absolute Maximum Rating, Continuous (Ripple & Noise <200mVpp) -2 18 VDC Remote Turn On Output Voltage Rising Time(5) 7.5 15 mS Remote Turn-On Start-Up Delay(6) 40 80 mS PROTECTION Short Circuit Protection When output short circuits and output voltage is over the pre-set value (around 20V), the module will enter protection mode and constant output current. If output voltage is over the pre-set value (around 20V), the output will be in hiccup mode. It will restart automatically when fault is removed. Over Current Protection Vin=450VDC, Vout=28VDC Over Current Mode: Current limit  Hiccup  Automatic Recovery 59 62 65 A Over Voltage Protection Vin=450VDC, Io=27A Enters a latch mode, input reset or use Remote CNT to restart 33 35 37 VDC Over Temperature Shutdown Baseplate temperature around the thermistor Set Point 105 110 115 ºC Restart 105 110 115 Hysteresis 10 ENVIRONMENTAL SPECIFICATIONS Operating Temperature Case Temperature -40 +100 ºC Storage Temperature Ambient Temperature -55 +125 ºC Humidity Non-Condensing 5 95 % Storage Humidity Non-Condensing 5 95 % Pin Solder Temp. Wave Soldering, Less than 10S 260 ºC Wave Soldering, Less than 10S 425 Shock Vibration MTBF Vin=500VDC, Full Load, Tc=25ºC 2x106 H GENERAL SPECIFICATIONS Efficiency Vin=450VDC, Vo=28VDC, Tc=25ºC 100% Load 93 95 % 50% Load 92.5 94.5 Switching Frequency 170 KHz Electrical Insulation Test Condition: 10mA/60s Rise Speed: 500VDC/s No Breakdown, No Arc Over Input to Output 4250 VDC Input to Case 3535 Output to Case 1500 Isolation Resistance Humidity 90%, Standard Atmospheric Pressure, 500VDC Voltage ≥100 MΩ PHYSICAL SPECIFICATIONS Weight 9.52oz (270g) Dimensions (L x W x H) 3.90in x 2.4in x 0.55in (99.1mm x 61mm x 13.9mm) Thermal Management Heatsink or Convection Cooling SAFETY CHARACTERISTICS Safety Approvals UL/IEC/EN60950/GB4943 EMC Characteristics Test together with the end system as a whole Conducted Noise GJB151A-97 Peak Voltage GJB151A-97 RoHS RoHS5 RoHS compliant materials + lead soldering Max. Surge Voltage Absolute Maximum Rating, ≤1s 800 VDC Standards and Specifications MIL-STD-810F Environmental engineering considerations and laboratory tests MIL-STD-461E Requirement for the control of electromagnetic interference characteristics of subsystems and equipment MIL-STD-202 Test methods for electronic and electrical component parts MIL-HDBK-217F Reliability prediction of electronic equipment MIL-M-28787 Modules, standard electronic general specification

Full Brick DC/DC Converter Single Output 2/1/2018 Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 3 of 10 NOTES 1. With external 22uF fast transient response, Low ESR electrolytic capacitor, 12µH Inductance. 2. If temperature is <-25ºC, need to add 2.2µG/100V CBB. 3. Input voltage rising up to the under voltage lockout restart voltage and measure the time Vin_min to 10%Vo_set. 4. 25%-50%-25%, 50%-75%-50% Step Change Load, di/dt=2.5A/µs, output connects a 2000µF solid or polymer capacitor. 5. Power at input and then use ON/OFF pin to turn on the module. Measure output voltage rising time 10%Vo_set to 90%Vo_set. 6. Power at input and then use ON/OFF pin to turn on the module. Measure output voltage rising time 10%Vo_set. 7. Note: Peak voltage judging method: -Based on captioned configurations and test according to the Standard/Class requirements, if no problem found, test result is considered PASS. -Based on captioned configurations and test according to the Standard/Class requirements, if no output from the modules because the over voltage protection of the under voltage lockout is triggered or the module failed due to component damaged, the test result is considered FAIL. -Based on captioned configurations and test according to the Standard/Class requirements, if there is temporary output voltage fluctuation but not exceeding the voltage regulation limit, output resumes normally after stop testing and no component damage, the test result is considered PASS. -Based on captioned configurations and test according to the Standard/Class requirements. If there is temporary output voltage fluctuations with spikes or valleys exceeding the voltage regulation limit, the test result cannot be determined. It will require further product evaluations. *Due to advances in technology, specifications subject to change without notice. ENVIRONMENTAL TESTS PARAMETER CONDITIONS TEST METHOD High Temp. Test Storage 125ºC, 24H GJB150.3A-2009 Part 3 <<High Temperature Test>> Operation 65ºC, 24H; 200V, 450V, 750V, each 8h Low Temp. Test Storage -55ºC, 24H GJB150.4A-2009 Part 4 <<Low Temperature Test>> Operation -40ºC, 24H, 200V, 450V, 750V, each 8h Temp. Shock Test Storage -55ºC~125ºC; Hold Time: 30min; Cycle: 25 times; switching time less than 1min GJB150.5A-2009 Part 5 <<Temperature Shock Test>>, Procedure I Operation -40ºC~65ºC; Hold Time: 30min; Cycle: 25 times; switching time less than 1 min High Temp. Life Test Input Nominal, High Temp, 1000h GJB360A-96, method 108 <<High Temperature Operating Test>> Static Temperature and Humidity Test 40ºC, 95%, 96h GJB360A-96, method 103 <<Static Temperature and Humidity Test>> Interchanging Temperature Humidity Test 25ºC~65; 95%; 24H/Cycle, Cycle: 10 times GJB360A-96, method 106 <<Humidity Test>> Salt Fog Test NaCl: 5±1%; PH: 6.5~7.2 (35±2ºC); 96h GJB360A-96, method 101 <<Salt Fog Test>>, Test conditions A Fungus Test GJB150.5A-2009 Fungus Conditions, by 28d appearance assessment does not exceed grade 2 GJB150.10A-2009 Low Pressure Test 58.53kPa, 16h GJB360A-96, method 105 <<Low Pressure Test>> Test Conditions F Vibration (Sinusoidal) 10-55Hz, 0.75mm, 2H/each axis GJB360A-96, method 201 <<Low Frequency Vibration Test>> Random Vibration 50-2000Hz, (2 m/s2) 2/Hz; 50-100Hz, +6dB/OTC; 1000- 2000Hz, -6dB/OTC; 30min/each axis GJB360A-96, method 214 <<Random Vibration Test>>, Test Conditions I-A Shock Test 500m/s2,11ms; 3 Perpendicular axis, 6 directions, 3 shocks each axis GJB360A-96, method 213 <<Shock (Regular Impulse) Test>>; Test Conditions A

Full Brick DC/DC Converter Single Output 2/1/2018 Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 4 of 10 RELIABILITY TESTS PARAMETER STANDARD STAGE SAMPLE STAGE CAUSE A. High Accelerated Life Test (HALT) High Temp. Step Stress √ / □ Prototypes for new product series ■ Products need high reliability ■ Products working in harsh environment □ Requested by customers Low Temp. Step Stress √ / Rapid Thermal Cycling Test / / Vibration Step Stress √ / Comprehensive Stress √ / Operating Temp. Stress √ / B. Quantitative Reliability Test Quantitative Reliability Test / √ □ Prototypes for new product series ■ Products need high reliability ■ Products need quantitative MTBF estimation □ Requested by customers C. Endurance Test Temp. Shock Test / √ □ Prototypes for new product series ■ Products need high reliability ■ Products working in harsh environments □ Requested by Customers ■ Products need durability estimation High Temp. & High Humidity / √ Operation Life / √ CHARACTERISTIC CURVES Derating Curve Efficiency Curve Temperature Load Curve

Full Brick DC/DC Converter Single Output 2/1/2018 Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 5 of 10 MECHANICAL DRAWINGS Note: 1. Units in mm (in) 2. Case Material: Aluminum Baseplate with Plastic Cover 3. Pin 1-4 and Pin 7-12 Diameter 1.0mm (0.04in) 4. Other Pins Diameter 2.0mm (0.08in) PIN DEFINITION PIN NAME FUNCTION

1 NC No Connection

2 NC No Connection

3 ON/OFF (+) Remote On/Off +

4 ON/OFF (-) Remote On/Off -

5 Vin (+) Input Positive

6 Vin (-) Input Negative

7 Vaux Auxiliary Power Supply Positive (Ground Reference Vout (-))

8 Start_Sync Sync Starting PIN (Option)

9 IShare Parallel Current Sharing

10 Trim Output Voltage Adjustment

11 S (+) Remote Sense Pin (Positive)

12 S (-) Remote Sense Pin (Negative)

13, 14, 15 Vout (-) Output Negative 16, 17, 18 Vout (+) Output Positive

Full Brick DC/DC Converter Single Output 2/1/2018 Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 6 of 10 PACKAGE, STORAGE & TRANSPORTATION Packaging Requirements

  • Packaging should prevent the modules from corrosion, degrading, and mechanical damaging during transportation.
  • Keep the modules clean and dry.
  • Packaging and shock absorbing materials should not generate static electricity and should be anti-corrosion
  • Unless specified, number of modules in package will be determined by the manufacturer.
  • There is a standard shame and dimension for the intermediate package which will minimize weight and size.
  • Labels are required at outer package. Storage Requirements
  • Unused modules should be kept in the packaging box. The storage environment should be free from corrosive gases, ventilated with relative humidity lower than 80% and storage temp. -10~40ºC.
  • Packaging boxes should be kept 20cm above ground level, at least 50cm from walls, heat sources, vents and windows.
  • Under captioned conditions, storage period is 2 years. It is recommended to re-qualify the modules after 2 years storage. Transportation Requirements
  • Products should be packaged in a strong box during transportation.
  • Outer box surface should meet relevant international standards with “Hand with Care” mark and “Keep Dry” mark.
  • Package should be made suitable for any common means of transportation. During transportation, the packages should avoid mechanical shocks and should avoid direct exposure to rain and snow. APPLICATION NOTES Typical Application Circuit The built in EMI filter meets the general EMI requirements of most applications. However, if the applications need to meet higher EMI standards, customers can add external EMI filters at the input terminals as shown in Fig. 1. Fig. 1 Typical Application Circuit Recommended Value Component Notes/Specifications R1, R2 470KΩ, 1/2W C1, C2 Good transient response, low ESR, Electrolytic capacitors 47µF/450V C3 Solid Cap 2000µF/50V C4 2000uF/50V Note: - When the ambient temp. is below -25ºC, a 1000µF solid capacitor is required at the output. If higher output capacitance is required, it is recommended to add electrolytic capacitors for stability and reliability concerns. - When ambient temps is below -25ºC and the input is rising rapidly (more than 10VDC/µs), it is recommended to add at least one 2.2µF/1000VDC (CBB Cap) input capacitor with a minimum total input capacitance not less than 20µF (Test Condition: 10KHz, -55ºC) or other external surge protection circuit to prevent excessive surge voltage damaging the module. Please make sure you test actual results in your applications. - When adding external EMI filters, please pay attention to the input capacitance matching to avoid excessive surge voltage damaging module. - There is no fuse built inside the module. For safety, it is recommended to connect a 10A fast blow fuse at Vin (+) when Vin (-) is connected to ground; at Vin (-) when Vin (+) is connected to ground. - The distances between the fuse and module should be minimized. - Please use capacitors with appropriate impulse current value.

Full Brick DC/DC Converter Single Output 2/1/2018 Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 7 of 10 On/Off Control ON/OFF Control: Negative Remote On/Off Logic Logic Voltage at ON/OFF Pin Logic Low Open Circuit Logic High Negative Module Enable Module Enable Module Disable Logic On/Off Application: Fig. 2 Remote On/Off Application Input Reflected Ripple Current Fig. 3 Input Reflected Ripple Current Test Note: - Oscilloscope BW=20MHz - L1: 12µH/100KHz - Ctest1 Ctest2: 470µF/450V, High Frequency Low ESR Electrolytic Capacitors - C1, C2: Tc=25ºC, 47uF/450V, High Frequency Low ESR Electrolytic Capacitors - R1, R2: 470KΩ, 1/2W - C3: 4000µF/50V, Solid Capacitor Output Voltage Ripple and Noise Full load at nominal input voltage and test input voltage from low line to high line. See Fig. 4 for test setup. Fig. 4 Output Ripple & Noise Test Note: - Oscilloscope BW=20MHz - C2: 4000µF/50V Solid or Polymer Cap - C3: 1µF/50V Ceramic Capacitor - C4: 10µF/50V Tantalum Capacitor

Full Brick DC/DC Converter Single Output 2/1/2018 Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 8 of 10 Output Voltage Trimming Connect external resistor between Trim and Sense (+) or between Trim and Sense (-) to adjust the output voltage between 25.2V to 30.8V. Trim up voltage with a resistor connected between Trim and Sense (+) and trim down the voltage with a resistor connected between Trim and Sense (-). The trim resistor should be connected as close to the module pins as possible. Leave the Trim pin open if no voltage trimming is required. Fig. 5 Output Voltage Trim Up Circuit Fig. 6 Output Voltage Trim Down Circuit Calculating Trim Up Resistance: Rtrim_up= Vout_norm x (100+Δ) - 100 -2 1.225 x Δ Δ Calculating Trim Down Resistance: Rtrim_down= 100 -2 Δ Note: Δ= Vout-Vout_norm x100 Vout - Vout: Desired Output Voltage - Vout_norm: Nominal output voltage 40V - The maximum power of the module is fixed. If output voltage increases, maximum current has to be reduced. - The maximum current of the module is fixed. If output voltage decrease, maximum output current will not change. - The maximum output voltage cannot exceed 30.8VDC. If input voltage is between 650VDC-700VDC, the output voltage can only be trimmed down. If input voltage is between 700VDC-750VDC, the output voltage can only be trimmed up. Output Remote Sensing The module built in remote voltage compensation function to compensate the line voltage drop. As shown in Fig. 7, connect Sense (+) and Sense (-) to the terminals of the load through a twisted pair. The voltage at the terminals of the load is regulated at the nominal output voltage of the module. If no remote voltage compensation is required, connect Sense (+) to Vout (+) directly and connect Sense (-) to Vout (-) directly. Fig. 7 Output Remote Sensing Note: - Max. output voltage of the module cannot exceed 110% of the nominal output voltage. Max. output voltage cannot exceed 30.8VDC - Polarity of Sense (+) and Sense (-) must be the same as output voltage, otherwise modules will enter protection mode. - Max. power of module is fixed. If output voltage increases, max. output current has to be reduced.

Full Brick DC/DC Converter Single Output 2/1/2018 Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 9 of 10 Parallel Operation Fig. 8 Parallel Operation Parallel: For paralleling the outputs of n modules, please connect the Ishare (Parallel Current Sharing) pins of the modules together and make sure the Ishare connecting lines are free from interference. When connecting the output pins of the modules together, please make sure the output impedance of the output lines are balanced. A maximum of 10 modules can be connected in parallel (Fig 8). Note: Formula to calculate the parallel current sharing accuracy - n: Number of paralleling modules - i: Module to calculate the load share accuracy - l1, l2…li…ln (2 ≤2≤10): Output current of each module - Ie: Nominal output current of each module - ΣI: Total output current of n modules - nIe: Total nominal output current of n modules Output Over Current & Short Circuit Protection When the output is overloaded or short circuit and the output voltage is over the pre-set value (around 20V), the module will enter protection mode with constant output current. If output voltage is over the pre-set value (around 20V), the output will be in hiccup mode. It will restart automatically when the fault is removed. Output Over Voltage Protection (OVP) When the output voltage exceeds the over voltage set point, the module will shut down. It is a latch mode and the input has to be reset or use Remote CNT pin to restart. Over Temperature Protection When the PCB temperature near the thermistor reaches the temperature set point 110ºC (typical value), it triggers the over temperature protection. Output voltage will shut down. When PCB temperature lowers to 100ºC (typical value), output resumes automatically.

Full Brick DC/DC Converter Single Output 2/1/2018 Wall Industries, Inc. • 37 Industrial Drive, Exeter, NH 03833 • Tel: 603-778-2300 • Toll Free: 888-597-9255 • Fax 603-778-9797 website: www.wallindustries.com • e-mail: sales@wallindustries.com Page 10 of 10 USER INFORMATION Please read the Warning and Important Notices section before using the modules. Any mis-operation can cause fire hazard or damages to the modules. Warning

  • When the module is powered up, please keep your body away from the module to avoid accidental injury.
  • Please do not modify or disassemble the module. This may cause electric shock. If customer modifies or disassembles the module, we are not responsible for any resulting consequences.
  • There are high voltage spots and high temperature spots inside the module. Please do not touch any internal component to avoid electric shock or burn.
  • When module is powered up, do not touch the module to avoid burns. Important Notices
  • Make sure that the input/output terminals and signal pins of the module are connected appropriately according to the application note/datasheet. Do not apply power when wiring the pins.
  • A fast blow 10A fuse or other over current protection device must be connected to the input terminal of the module.
  • The schematics and parameters of the module are for reference only. Customers have to verify these schematics and the effective value of the parameters before they finish the circuit design.
  • Please use the module within indicated specifications. Stress above the specifications will cause permanent damages to the product.
  • Users must consider the potential electrical hazards of the output terminals. They are responsible for the appropriate design to avoid accidental contact from people or objects during operation.
  • Wall Industries, Inc. reserves the right for the interpretation of this document. Any redistribution or reproduction of part or all of the contents in any form is prohibited without permission from Wall Industries, Inc. COMPANY INFORMATION Wall Industries, Inc. has created custom and modified units for over 50 years. Our in-house research and development engineers will provide a solution that exceeds your performance requirements on- time and on budget. Our ISO9001-2008 certification is just one example of our commitment to producing a high quality, well-documented product for our customers. Our past projects demonstrate our commitment to you, our customer. Wall Industries, Inc. has a reputation for working closely with its customers to ensure each solution meets or exceeds form, fit and function requirements. We will continue to provide ongoing support for your project above and beyond the design and production phases. Give us a call today to discuss your future projects. Contact Wall Industries for further information: Phone: (603)778-2300 Toll Free: (888)597-9255 E-mail: sales@wallindustries.com Web: www.wallindustries.com Address: 37 Industrial Drive Exeter, NH 03833