Cooled Incubator SMART ST500 POL-EKO

Memmert HPP260eco Climate Chamber 256L, 115V Setting Temperature Range (without light, with humidity (more)) +5 to +70°C Setting Range Humidity 10 to 90 % rh Chamber Volume 256L (9 cu. ft.) Features - 256 L (9 cu. ft.) capacity for versatile storage and climate control - Temperature range of +5 to +70 °C with humidity and 0 to +70 °C without humidity - Temperature setting accuracy of 0.1 °C for precise control - Equipped with two Pt100 sensors for reliable temperature monitoring and error management - Humidity range from 10 to 90% RH, controlled with a distilled water tank and self-priming pump - Features a hot steam generator for humidification and a Peltier cold trap for dehumidification - TwinDISPLAY with adaptive PID-microprocessor controller for easy monitoring and adjustments - AtmoCONTROL software allows programming, data management, and transfer via USB or Ethernet The Memmert HPP260eco Climate Chamber 256L, 115V provides reliable and precise climate control for advanced laboratory needs. With a spacious 256-liter capacity, it supports a versatile temperature range of +5 to +70 °C with humidity and 0 to +70 °C without, making it ideal for a range of incubation and storage requirements. The chamber achieves exceptional accuracy with a setting precision of 0.1 °C, and dual Pt100 sensors ensure reliable temperature monitoring and error handling. Humidity control ranges from 10 to 90% RH, utilizing a self-priming distilled water pump and efficient Peltier technology for dehumidification. This combination of features supports stable, uniform environmental conditions within the chamber. The unit's intuitive TwinDISPLAY control system, featuring a PID-microprocessor and two TFT-color displays, offers easy monitoring and adjustments for temperature, humidity, and time. AtmoCONTROL software enhances data management, allowing users to program, manage, and transfer data through USB or Ethernet connections. Designed for durability, the climate chamber's stainless steel interior and exterior ensure a hygienic and corrosion-resistant environment, with a fully insulated stainless steel door for temperature retention and an inner glass door for convenient viewing. The Memmert HPP260eco also includes an AutoSAFETY function with an over- and undertemperature monitor, providing visual and acoustic alarms, ensuring a high level of operational safety. INCLUDED: The Memmert HPP260eco Climate Chamber 256L, 115V includes: - 2 Stainless Steel Grid - Tilt Protection Wall Bracket - USB Drive w/ Software & AtmoCONTROL Manual - Calibration Certificate - Power Cord - Operator's Manual - Manufacturer's Documentation - 3 Year Manufacturer's Warranty

CABINET CSB60 - CHEMISAFE Modular solutions for storing chemicals. - Entirely made of 15/10 mm thic (more)k electrogalvanized steel sheet, cold bent - External finish made of 90 micron acid resistant epoxy resin and passage through a thermal tunnel at 200 °C - Monocoque construction with feet for leveling the cabinets - Simple single layer swing doors - Lock and key - Door opening at an angle of 110° - External zip in corrosion resistant plastic - Compartments equipped with fixed retention shelves made of plasticized/painted/stainless steel with adjustable height - Connection collar Ø 125 mm - Standardized pictograms according to ISO 3864 standards Supplied: - 3 plasticized steel shelves (max load 40 Kg distributed evenly) Optional: - Shelves - Timer - Plinth - Retention tank - Door open alarm - Ventilation - Filter

REFRIGERATED LABORATORY INCUBATORS ST SMART POL-EKO ST - STABILITY AND QUALITY AT THE BEST PRICE Bei (more)ng able to both heat and cool, ST incubators are perfect for the stable and safe incubation of samples, in any working environment. The ST series maintains a constant temperature from 3°C to 40°C with excellent precision. As an option, the range can be extended up to +70 °C. Operation at ambient temperature +10°C...+28°C, for cooled incubators with glass door +10°C...+25°C. It's necessary to purchase automatic defrosting function (ST/CHL PLUS) for all units operating at set point <=5°C to prevent icing. Large touch display, LED lighting, alarms, lock, simple and comfortable design, will make using these incubators a breeze; and thanks to the programming with time and temperature profiles, you will be able to carry out highly precise and repeatable incubations. But it doesn't end here, continue reading and discover all the other surprising features of these incubators! WHICH VERSION? THE THREE VERSIONS OF THE ST MODEL The three models differ in the materials of the internal chamber, the materials of the shelves and the safety class. This subdivision allows you to choose based on your real needs, meeting your budget. BASIC: aluminum interior; metal grid shelves; safety class 1.0 (DIN 12880). COMFORT: stainless steel interior according to DIN 1.4016; stainless steel grill shelves; safety class 1.0. PREMIUM: Interior in acid-resistant stainless steel according to DIN 1.4301; stainless steel grill shelves; safety class 2.0. As an option, at the bottom of the page, you can find the ST-INOX accessory; this allows you to order your ST refrigerated incubator with polished stainless steel exteriors, rather than powder-coated sheet metal (light gray with graphite front panel) as standard. ABSOLUTE CONTROL CONTROL PANELS The SMART control panel is among the most complete you can find on the market. Large symbols and temperature values ​​guarantee comfortable and clear reading, combined with disarming ease of use. The latest generation touch screen responds to commands even if touched with latex gloves and is equipped with a large display: all values ​​are perfectly readable from any angle, regardless of the intensity of the light. More and more? POL-EKO has already thought about it. For those who want cutting-edge functions and the freedom of transfer and remote use, POL-EKO offers you the SMART PRO controller. You can find all the differences between the SMART and SMART PRO panel in our dedicated post: insights on SMART and SMART PRO. With the SMART PRO versions, more accessories and options will also be available. DO YOU KNOW THE ADVANTAGES OF AN ADVANCED CONTROLLER LIKE THE SMART PANEL? - Sharp 4.3' color touch screen - Quick and easy data transfer: via LAN or USB - Fast, multi-segment, time and temperature programming - Visual and audible alarms with colored bar on display - Internal memory for programs and data storage - User manual downloadable directly from the controller - Loop function up to 255 times or infinite - Controls can be managed even when wearing latex gloves - Recording of the minimum, average and maximum temperature value for each segment - Overview of the set and current parameters during operation - Operation in temperature or time priority mode - ... and much more More and more? POL-EKO has already thought about it. For those who want cutting-edge functions and the freedom of transfer and remote use, POL-EKO offers you the SMART PRO controller. You can find all the differences between the SMART and SMART PRO panel in our dedicated post: insights on SMART and SMART PRO. With the SMART PRO versions, more accessories and options will also be available. QUALITY FIRST Resistant. Durable. POL-EKO incubators are designed and built to guarantee the best performance. They are a smart purchase, for customers who want to invest in the future of their laboratory. By choosing these products you will have precise results for years and years, repeatable and in complete comfort. The ST SMART series incubators are built with the best materials and equipped with the most important accessories, to give you a complete and ready-to-use standard product. - Insulated door with lock - Internal LED light - Optional internal and/or external glass door - USB port for downloading recording data, events, manuals, service. - LAN port - Open door alarm - Access port for external sensor on the side - Quality control protocol (in +37°C) - Available with FOT: phytoperiodic system – day and night simulation. To find out more, download our informative PDF: The photoperiodic (FOT) and phytotron (FIT) systems by POL-EKO. The three versions of the ST models The three models differ in the materials of the internal chamber, the materials of the shelves and the safety class. This subdivision allows you to choose based on your real needs, meeting your budget. BASIC: aluminum interior; wire shelves; over temperature protection class 1.0. COMFORT: stainless steel interior according to DIN 1.4016; stainless steel wire shelves; over temperature protection class 1.0. PREMIUM: Interior in acid-resistant stainless steel according to DIN 1.4301; stainless steel wire shelves; over temperature protection class 2.0. As an option, at the bottom of the page, you can find the ST-INOX accessory; this allows you to order your ST refrigerated incubator with polished stainless steel exteriors, rather than powder-coated sheet metal (light gray with graphite front panel) as standard. ST SMART SERIES POL-EKO offers 10 models of refrigerated incubators with capacities from 70 to 1540 litres. The ST series also offers multi-chamber models with two or three separate and independently controlled internal compartments. These solutions allow you to save space in the laboratory and perform tests at different temperatures. Mixed multichambers are also available, such as incubator-refrigerator or incubator-freezer combinations. DETAILS AND ACCESSORIES Every detail of your POL-EKO models is designed to make routine work as simple and comfortable as possible. Below, the front and rear view. 1 - rating plate 2 - Temperature sensor 3 - Shelf 4 - Access port for external sensor 5 - Adjustable feet 6 - Solid external door 7 - Ventilation 8 - Lock 9 - Touch screen control panel 10 - USB port 11 - Door open sensor 1 - Main switch 2 - Condenser 3 - Cooling system 4 - Fuse 5 - Main power socket 6 - LAN port For larger models: a - Anchor rods b - Integrated power cable c - Fuse d - Main switch e - LAN port OPTIONS POL-EKO allows you to increase the possibilities of your incubator with quality accessories; to better adapt to particular applications or to equip the instrument with safety systems and advanced connections. In the photo, the beautiful glass doors supplied with the ST models. - Internal glass door - External glass door - Grid shelf - Stainless steel grill shelf - Perforated shelf - Reinforced shelf - Stainless steel basins - Aluminum or stainless steel drawer with guides - Wheels - Coffee table with wheels - Automatic defrost function - Heating up to 70°C - Photoperiodic system - POT - Internal socket - LabDesk software - IQ OQ PQ calibration and qualification - Overtemperature protection class 3.3 according to DIN 12880 - Backup battery for the display in case of power failure - Dry alarm contact - LAN cable - Non-standard 20/60/100 mm access door - Additional 30 mm access door

LED illuminated shelves Homogeneous illumination and constant temperature ensure the same conditions (more) between the different samples, on the entire shelf. FOC 200IL is ideal for a wide variety of applications including plant growth, seed germination, cultivation, insect and small animal husbandry, cultured bacteria and fermentation studies FOC200IL is equipped with 2 illuminated shelves each consisting of six LED bars mounted horizontally in the lower part, so as to illuminate the shelf below. It is also equipped with a timer for the lights. Thermoregulation and thermal stability at their best - The Auto-Tuning thermoregulation system guarantees excellent thermal homogeneity and stability (± 0.5°C) - Ecological cooling system and low operating costs - Selectable incubation temperature and working range from 3°C to 50°C - Uniform temperature thanks to VELP ventilation technology - 3-digit DIGITAL DISPLAY, resolution 0.1°C - Transparent internal door for observation of the sample without temperature alterations - Customizable lighting cycle timer - Equipped with 2 illuminated shelves (30,000 lux / shelf), each with six LED bars mounted horizontally under the shelf - Volume of 169 liters net - Internal sockets to power devices - Intuitive digital interface, with three buttons for easy setup of the instrument - Constant monitoring according to GLP (Good Laboratory Practice) - Adjustable recording time (in case of connection to VELP Ermes and TempSoft ™) - The optional TempSoft ™ incorporates high / low alarm thresholds - Quick and easy calibration - Control up to 10 FOC Connects. - Set the work ramps (different times and temperatures) and the desired setpoint, with the possibility of minimum and maximum temperature alarm thresholds - Monitor the internal temperature with dedicated graphics - Export data in multiple formats - Store test data in accordance with Good Laboratory Practice (GLP)

CABINET CSB60UB - CHEMISAFE Modular solutions for storing chemicals. - Entirely made of 15/10 mm th (more)ick electrogalvanized steel sheet, cold bent - External finish made of 90 micron acid resistant epoxy resin and passage through a thermal tunnel at 200 °C - Monocoque construction with feet for leveling the cabinets - Simple single layer swing doors - Lock and key - Door opening at an angle of 110° - External zip in corrosion resistant plastic - Compartments equipped with fixed retention shelves made of plasticized/painted/stainless steel with adjustable height - Connection collar Ø 125 mm - Standardized pictograms according to ISO 3864 standards Supplied: - 2 ripiani realizzati in acciaio plastificato (carico max 40 Kg distribuiti uniformemente) Optional: - Shelves - Timer - Plinth - Retention tank - Door open alarm - Ventilation - Filter

REFRIGERATED LABORATORY INCUBATORS ST SMART POL-EKO ST - STABILITY AND QUALITY AT THE BEST PRICE Bei (more)ng able to both heat and cool, ST incubators are perfect for the stable and safe incubation of samples, in any working environment. The ST series maintains a constant temperature from 3°C to 40°C with excellent precision. As an option, the range can be extended up to +70 °C. Operation at ambient temperature +10°C...+28°C, for cooled incubators with glass door +10°C...+25°C. It's necessary to purchase automatic defrosting function (ST/CHL PLUS) for all units operating at set point <=5°C to prevent icing. Large touch display, LED lighting, alarms, lock, simple and comfortable design, will make using these incubators a breeze; and thanks to the programming with time and temperature profiles, you will be able to carry out highly precise and repeatable incubations. But it doesn't end here, continue reading and discover all the other surprising features of these incubators! WHICH VERSION? THE THREE VERSIONS OF THE ST MODEL The three models differ in the materials of the internal chamber, the materials of the shelves and the safety class. This subdivision allows you to choose based on your real needs, meeting your budget. BASIC: aluminum interior; metal grid shelves; safety class 1.0 (DIN 12880). COMFORT: stainless steel interior according to DIN 1.4016; stainless steel grill shelves; safety class 1.0. PREMIUM: Interior in acid-resistant stainless steel according to DIN 1.4301; stainless steel grill shelves; safety class 2.0. As an option, at the bottom of the page, you can find the ST-INOX accessory; this allows you to order your ST refrigerated incubator with polished stainless steel exteriors, rather than powder-coated sheet metal (light gray with graphite front panel) as standard. ABSOLUTE CONTROL CONTROL PANELS The SMART control panel is among the most complete you can find on the market. Large symbols and temperature values ​​guarantee comfortable and clear reading, combined with disarming ease of use. The latest generation touch screen responds to commands even if touched with latex gloves and is equipped with a large display: all values ​​are perfectly readable from any angle, regardless of the intensity of the light. More and more? POL-EKO has already thought about it. For those who want cutting-edge functions and the freedom of transfer and remote use, POL-EKO offers you the SMART PRO controller. You can find all the differences between the SMART and SMART PRO panel in our dedicated post: insights on SMART and SMART PRO. With the SMART PRO versions, more accessories and options will also be available. DO YOU KNOW THE ADVANTAGES OF AN ADVANCED CONTROLLER LIKE THE SMART PANEL? - Sharp 4.3' color touch screen - Quick and easy data transfer: via LAN or USB - Fast, multi-segment, time and temperature programming - Visual and audible alarms with colored bar on display - Internal memory for programs and data storage - User manual downloadable directly from the controller - Loop function up to 255 times or infinite - Controls can be managed even when wearing latex gloves - Recording of the minimum, average and maximum temperature value for each segment - Overview of the set and current parameters during operation - Operation in temperature or time priority mode - ... and much more QUALITY FIRST Resistant. Durable. POL-EKO incubators are designed and built to guarantee the best performance. They are a smart purchase, for customers who want to invest in the future of their laboratory. By choosing these products you will have precise results for years and years, repeatable and in complete comfort. The ST SMART series incubators are built with the best materials and equipped with the most important accessories, to give you a complete and ready-to-use standard product. - Insulated door with lock - Internal LED light - Optional internal and/or external glass door - USB port for downloading recording data, events, manuals, service. - LAN port - Open door alarm - Access port for external sensor on the side - Quality control protocol (in +37°C) - Available with FOT: phytoperiodic system – day and night simulation. To find out more, download our informative PDF: The photoperiodic (FOT) and phytotron (FIT) systems by POL-EKO. The three versions of the ST models The three models differ in the materials of the internal chamber, the materials of the shelves and the safety class. This subdivision allows you to choose based on your real needs, meeting your budget. BASIC: aluminum interior; wire shelves; over temperature protection class 1.0. COMFORT: stainless steel interior according to DIN 1.4016; stainless steel wire shelves; over temperature protection class 1.0. PREMIUM: Interior in acid-resistant stainless steel according to DIN 1.4301; stainless steel wire shelves; over temperature protection class 2.0. As an option, at the bottom of the page, you can find the ST-INOX accessory; this allows you to order your ST refrigerated incubator with polished stainless steel exteriors, rather than powder-coated sheet metal (light gray with graphite front panel) as standard. ST SMART SERIES POL-EKO offers 10 models of refrigerated incubators with capacities from 70 to 1540 litres. The ST series also offers multi-chamber models with two or three separate and independently controlled internal compartments. These solutions allow you to save space in the laboratory and perform tests at different temperatures. Mixed multichambers are also available, such as incubator-refrigerator or incubator-freezer combinations. DETAILS AND ACCESSORIES Every detail of your POL-EKO models is designed to make routine work as simple and comfortable as possible. Below, the front and rear view. 1 - rating plate 2 - Temperature sensor 3 - Shelf 4 - Access port for external sensor 5 - Adjustable feet 6 - Solid external door 7 - Ventilation 8 - Lock 9 - Touch screen control panel 10 - USB port 11 - Door open sensor 1 - Main switch 2 - Condenser 3 - Cooling system 4 - Fuse 5 - Main power socket 6 - LAN port For larger models: a - Anchor rods b - Integrated power cable c - Fuse d - Main switch e - LAN port OPTIONS POL-EKO allows you to increase the possibilities of your incubator with quality accessories; to better adapt to particular applications or to equip the instrument with safety systems and advanced connections. In video, the animation shows the ST2 refrigerated incubator with the possible shelves available: shelf with compartments; perforated shelf; grill shelf. - Internal glass door - External glass door - Grid shelf - Stainless steel grill shelf - Perforated shelf - Reinforced shelf - Stainless steel basins - Aluminum or stainless steel drawer with guides - Wheels - Coffee table with wheels - Automatic defrost function - Heating up to 70°C - Photoperiodic system - POT - Internal socket - LabDesk software - IQ OQ PQ calibration and qualification - Overtemperature protection class 3.3 according to DIN 12880 - Backup battery for the display in case of power failure - Dry alarm contact - LAN cable - Non-standard 20/60/100 mm access door - Additional 30 mm access door

MULTISTIRRER 15 Velp multiposition magnetic stirrer MULTISTIRRER 15 is a 6-place magnetic stirrer fo (more)r ø 85 mm beakers. Designed to last, these tools feature a stainless steel top that is resistant to chemical corrosion. It is possible to set a common speed up to 1500 rpm, with the electronics guaranteeing good speed regulation even at low rpm. Even after several days of operation, the instruments do not overheat, which is a highly valued feature in microbiology and biochemistry. It is possible to thermostat the samples by combining MULTISTIRRER with a recirculating water bath. ROBUST AND PRACTICAL - The control panel is protected from liquid spills - Heavy duty steel construction with epoxy coating - Stainless steel cover - Very low height - ergonomic - Lightweight, easy to move - Designed for maximum durability and backed by a 3 year warranty THE ADVANTAGES OF THE VELP MICROSTIRRER - Clear surface for viewing particles and color changes - It doesn't get hot, even after days of continuous use - Can thermostat samples using a recirculating water bath - Ideal for microtitration, microbiology and biochemistry - Soft start but quick achievement of the set speed - High power magneto 'PCM' driven by single phase motor for continuous operation

MULTI-HS 15 DIGITAL VELP MAGNETIC STIRRER SAFETY AND RESISTANCE - Warning message on the display whe (more)n the plate reaches 50°C - The Safety Lock function prevents unintentional changes of settings in order to meet all laboratory safety standards. - The VELP CerAlTop ™ top plate is made of aluminum alloy which guarantees temperature homogeneity with excellent heat distribution and high specific power thanks to the circular configuration. A thin layer of ceramic protects the plate from scratches and chemicals and guarantees high resistance to thermal stress and thermal shock. SMART AND SIMPLE USER INTERFACE The LED display is easy to read and thanks to the intuitive icons the operator will always have an eye on the working conditions: - Active heat - Temperature set point - Activating the timer - Automatic reverse option - Lock button Two extremely precise rotary knobs control the temperature and speed setting and to start the heating you need to press the knob; a small detail that exemplifies Velp's utmost attention to operator safety. By touching both knobs simultaneously, it is possible to access the advanced menu for the most suitable configuration of all operating modes. POWER AND PRECISION - The extremely powerful Brushless motors are able to stir from 100 up to 1000 rpm, offering practically unlimited duration over time. The stirring speed is always constant, even when the viscosity changes, thanks to the SpeedServo ™ torque compensation. - The middle button allows you to set the timer for unsupervised work. The Timer can be set from 1 min up to 99 hours and more advanced configurations can be set in the advanced menu. - The Auto-reverse option improves the kinetics by changing the direction of the stirring direction. You can also set the direction change to your preferred time interval. TECHNICAL FEATURES: Stirring position distance: 74 mm. Stirring speed: 100 - 1000 rpm. Speed setting accuracy: 5 rpm. Temperature setting resolution: 1°C. Hot top warning: on display (>50°C). Timer: from 1 min to 99 h: 59 min. Timer setting steps: 1 min. Autoreverse: from 5 s to 99 min-59 s. Autoreverse setting steps: 1 s.

The H315 waterproof scale Made to work in high humidity conditions and even direct contact with wate (more)r. Designed for precision measurements, making it used in situations where weighing readability is crucial. The power of steel The use of stainless steel for the construction guarantees you a long life for the balance. It is not afraid of contact with moist objects or accidental splashes. The robustness and strength of the design of the platform scales makes it possible to weigh large objects, such as pallets of goods. The stable platform is resistant to vibration, which is important when weighing large objects. Not just weighing But also parts counting, percent weighing, animal weighing and peak hold. The power of H315&rsquo;s working mods. Do you require fast and repeatable weight measurement under difficult conditions? The H315 scale is made for that! It has been with us for years, and will stay for a long time to come The LCD display has accompanied us for long years. During this time it has proven its reliability. It guarantees the readability of the result from many angles and is energy efficient. Inner power No access to mains power? Power failure? No problem. Thanks to its internal rechargeable battery, the H315 scale allows many hours of operation without mains power (up to 7 hours). Battery power supply is available at an extra charge. As standard, the scale is equipped with a RS232 cable, to which you can connect most of the accessories from our range.

The HX5.EX scale is a modern weighing instrument assuring fast and reliable measurement in hazardous (more) areas classified as zones 1/21 and 2/22. To ensure precision and excellent measurement repeatability, high quality electronic components are used. The weighing platforms offered in wide range of dimensions and maximum capacities, this combined with excellent metrological parameters enables easy selection of an instrument that meets the most demanding requirements. Standard version of the scale is equipped with 2 serial, intrinsically safe RS232 communication interfaces, and with one RS485 interface. They facilitate cooperation with equipment intended for operation in hazardous areas. Possibility to add digital inputs/outputs extends the range of instruments compatible with the indicator by automatic elements compliant with ATEX directive. More demanding customers can use the IM01.EX module, installed in the safe area, which extends the available connectors by Ethernet, USB, 4-20mA/0- 10V analog outputs, Profibus DP and additional digital inputs/outputs. This enables cooperation with external devices: barcode scanners, printers, external displays, control buttons, light signalling towers, other controlling/signalling devices, systems for automatic process control and superior IT systems. Scale operation requires use of a dedicated PM01.EX power supply, which is not a standard scale component. To operate the scale, order a selected type of the dedicated intrinsically safe power supply. Power supply types: PM01.EX-1 - power supply for operation in ATEX area. Used when it is required to connect the power supply to voltage source placed in hazardous area. PM01.EX-2 - power supply for operation outside ATEX area. Used when power supply connection to voltage source is carried out outside hazardous area. Complex software enables carrying out many tasks connected with mass measurement, e.g. parts counting, checkweighing and statistics. The scales feature user-friendly graphic interface, which can be customized using widgets. This and the large colour display of high resolution guarantee easy and clear transmission of data on current process. Colour bar graph significantly influences performance by signalling whether the weighing result is within declared thresholds or not.

Motic PSM-1000E Trinocular Upright Industrial Microscope, Head Only Objectives Optional Optical Sys (more)tem Spectrums ranging from NUV to visible to NIR Illumination Port for Fiber-Optic Coaxial Illumination Features - Design encourages the optimal amount of usability without sacrificing comfort - Standard equipped for laser work covering the spectrums ranging from 355nm [UV] to 532nm [Green] to 1064nm [IR] - Rated for load weights up to 45lbs., image focal planes can be adjusted at 1μm resolutions within the total 50mm stroke - Forward facing and equipped for four M26 x 1/36" (0.706) type objectives, the PSM-1000E's nosepiece is dovetail mounted for molding to different types of research and usage - 5 Year Manufacturer's Warranty

Small footprint, inexpensive, portable mini power supplies for use with small or mini horizontal and (more) vertical electrophoresis apparatus. Output voltage: ≤400 V Output power: ≤50 W Output current: 250 mA at 200V, 125 mA at 400V 3 parallel outputs (4 mm sockets) 1 V or 1 mA resolution Voltage or current shown on large LED display Overload protection, including protection against accidental short circuit at output terminals