We understand your factory floor challenges and can help you meet your goals with one of the broadest safety portfolios in the industry. Referred to as the safe distance, this distance is calculated from the worker entry direction, protective equipment response time, machine response time, and minimum object size detectable by the protective equipment. Foolproof design prevents incorrect operation. An appropriate system suitable to the safety of the overall machine must be designed, selected, and constructed after evaluating the risks in the work environment as well as hazardous conditions, such as the frequency of access to hazardous areas and the time required to ensure the hazard has been removed. Pollution degree 1 is possible in clean rooms or other places with clean air. It is the reference voltage for dielectric strength tests and creepage distance for insulation material. The overvoltage category is one of the factors that decide spacing determined by the overvoltage category and pollution degree.
Step 3: Remove hazards and reduce risks as much as possible. Monitors contact welding using safety relays. The maximum value of the rated insulation voltage Ui must be greater than that of the rated operating voltage. Pollution degree 1 There is no pollutant or only a dry, non-conductive pollutant that has no effect on components. These functions are designed to operate correctly within the control system in which they are used.
Circuit Examples Safety Components The safety components that are used in these circuit examples are equipped with functions such as a direct opening mechanism for switches and a forcibly guided mechanism for relays, as required by standards. These interlock mechanisms are only part of the safety systems of machines. Step 1: Specify the operating range of the machine. Step 4: Design guards, safety equipment, and other safeguards against any residual risks. A control system cannot be constructed using only the safety components. Your browser does not support iframes.
They stipulate items such as detection performance for the minimum size object detected, effective aperture angle, extraneous light resistance performance, and mutual interference resistance performance. Pollution degree 3 There is a conductive pollutant or a dry, non-conductive pollutant that becomes conductive due to expected condensation. They stipulate items such as detection performance for the detection range, allowable errors, response time, detection capacity, resistance to extraneous light, and reflective detection capability as well as the influence of background interference. It offers a logic configuration with multiple inputs and the control of multiple independent outputs. K3 The magnetic contactor will maintain a gap in normally closed contacts of at least 0.
Monitors operation at an appropriate interval using a control system. Circuit redundancy using relays: Improves reliability with duplicate relay coil operating circuits K1 and K2. This automatically checks all relay contacts for faults via the safety circuit interface relay and it prevents the start of operation if any faults are found. Fail-safe design keeps the safety door locked when power fails. When designing a safety-related control system using safety components, refer to Circuit Diagrams. Circuit redundancy using relays: Improves reliability with duplicate relay coil operating circuits K1 and K2 connected in parallel. You can configure this relay by selecting certified safety function blocks to rapidly build your applications.
Pollution degree 4 There is a pollutant that is continuously conductive due to the presence of conductive dust, rainfall, or snowfall. The non-conductive pollutant may be conductive on occasions due to unexpected condensation. Pollution degree 2 There is only a non-conductive pollutant. This relay is ideal for applications requiring as many as ten dual-channel safety circuits and controlling as many as five output zones. Step 2: Identify the hazards and assess the risks. Pollution degree 3 is normal in ordinary factories. Also, be sure that operation does not create alternative risks.
Note:Safety functions will be lost by a single failure, such as a short-circuit failure in the input wiring. Single-function safety relays are the most economical solution for smaller machines where a dedicated logic device is needed to complete the safety function. Category 1: Main Safety Functions Fully Proven Parts and Safety Principles 1. Safety Category 1 Category B applies basic safety rules, such as those regarding the environment that are common to other categories, and it does not apply to interlocking devices that use ordinary safety guards safety doors. Safety Relays Safety Relays check and monitor a safety system and either allow the machine to start or execute commands to stop the machine. Modular and configurable monitoring safety relays are preferred where a large and diverse number of safeguarding devices and minimal zone control are required. .
Category 3: Main Safety Functions Refer to safety category 1. The value of the current must be greater than that of the rated operational current Ie. Category 2: Main Safety Functions Refer to safety category 1. This technology helps enhance safety and increase machine- and plant-wide efficiency. Category 4: Main Safety Functions 1, 2, and 3: Refer to safety category 1. Pollution degree 2 is normal for electric products that are used inside control panels, electric household appliances, and business equipment.
The system supports up to 20 diverse inputs and can control up to 3 zones, performing simple function block logic configurations through rotary switch settings as opposed to software configuration. Step 5: Inform and warn users about any residual risks. Generates an electrical potential between each channel with a two-channel input. Control circuit forced opened directly by a safety switch in positive operation. This relay is completely integrated with Allen-Bradley Logix controllers and can be configured using Studio 5000 Logix Designer® software or Connected Components Workbench software.