Carlo Gavazzi ~ Automation and Safety Products

Carlo Gavazzi manufactures, markets, and sells a broad range of products for industrial automation. Some of Gavazzi's products areSolid State Relays, Timers, Capacitive Proximity Sensors / Switches, Inductive Proximity Switches / Sensors, Current monitors, Voltage Monitors, Phase Monitors, Digital Panel Meters,Photo Electric Sensors / Switches, Laser Sensors, Ultra Sonic Sensors, Safety Light Curtains, Safety Mats, Mechanical Relays, Contactors, Rotary Disconnect Switches, and Power Supplies.

Carlo Gavazzi's range of safety mats are available in various sizes and feature a mechanical life in excess of 1 million operations. Furthermore, mat segments may be joined together to cover a larger or irregular shaped area. The rugged construction allow our safety mats to be used in most applications. When used with one of our safety modules, they constitute a category 3 safety system in accordance wuth EN954-1 and EN1760-1. They are typically used around wood working machinery, industrial robots, automated material handling equipment, and machine tools.

Carlo Gavazzi offers a comprehensive range of magnetic sensors for use in proximity detection applications. As their name suggests, they used in conjunction with an external magnet - when the sensor approaches the magnet, the output from the sensor will change state. Typically these sensors will have a longer sensing distance than typical proximity sensors. As well, the output will be a mechanical contact. There are a wide variety of styles available including rectangular, cylindrical, and slotted. As well, special coded magnets and sensors are available for use in safety applications. Magnetic sensors are frequently used on elevators and lifts, gate control, level detection, and access control.

Carlo Gavazzi offers a complete range of safety switches. Cable safety switches are essential for the continuous control of a long line of machines or on conveyor systems. They guarantee the safety of the operator, who is able to immediately stop machinery by pulling on the wire.

Key type switches are used to prevent machinery from being started without

the key in place. Once the key is inserted, the machinery may be started. Hinge type switches operate when the arm has been moved a certain number of degrees. They are frequently used to stop machinery in the event a door or gate is opened.
With manual reset types, once the limit switch has been activated by the actuator arm, the switch may only be reset by pulling the blue rearm button. These types of switches are frequently used in mechanical and hydraulic hoists and lifts.

Carlo Gavazzi's range of safety modules includes modules for light curtains, safety mats, two hand control (anti-tie down device), magnetic and safety switches, and emergency stop. They are available with up to 3 force guided relay safety outputs and are suitable for use in applications up to category 4. Gavazzi also offer extension modules which are used in conjunction with our safety modules and allow you to increase the number of safety outputs. Gavazzi safety modules feature cUL and TUV approvals. Our modules are powered by 24 VAC/DC, 110 VAC, or 230 VAC and feature LED status indicators.

Carlo Gavazzi's range of light curtains are available in various heights (161mm up to 1650 mm / 6.3 inches - 65 inches) and are available with finger, hand, and body resolutions. Gav

azzi light curtains are designed and manufactured in conformity with EN954-1 and EN61496 and have TUV and cUL approvals. Carlo Gavazzi light curtains, in conjunction with our safety

modules, are suitable for use in applications up to category 4. Features include fixed and floating blanking, cascade operation (SB4M), external device monitoring, and on our body resolution curtains we also feature a muting function with built-in muting sensors. Accessories include deviating mirrors, floor stands, and supports.

Anderson-Bolds has a complete line of safety products for your in plant use.

AB Safety Products!

216-360-9800

Safety Systems and Fail safe

Understanding the Fail-Safe Concept
Principle of SafetyThe fail-safe concept monitors the sensor status at all times. In the event of a failure, the fail-safe concept will simulate a protected position. The “protected” position is when the sensor is activated (closed) and the “normal” or “run” position is when the sensor is not activated (open).

- Normal Conditions – constant current flow (I) holding relay coil (K1) energized- Loss of Power – no current flow (I) and relay coil (K1) is de-energized- Actuation of Sensor – relay coil (K1) is shorted and de-energized- Failure of Sensor in the closed position – relay coil (K1) is shorted and de-energized- Failure of Sensor in the open position – (broken wire, switch or conductor) interupts current flow (I)and relay coil (K1) is de-energized- Resistor R – limits current flow through the sensor when actuated
Fail-Safe (4 wire system)
Fail-Safe is a shorthand term used to mean Fail to a Safe condition. In machinery with known hazards, the system is fail-safe when any failure leaves the machinery in a safe condition. The 4-wire fail-safe concept is illustrated in the figure above. A small current is constantly flowing through the sensor at all times, holding the relay coil energized at all times. The machine controls, interrupt, or stop circuitry is connected to the contacts of this relay. If the sensor is actuated, the relay coil will be shorted, causing the relay to deenergize. A resistor in series provides current limiting from overdrawing the power supply and limits the current through the sensor in the actuated position. If the sensor fails in the closed position the relay will be shorted and cannot be energized until the failure is corrected. If the sensor fails in the open position, the current path for the relay coil no longer exists and the relay coil cannot be energized until the current path is restored and the failure corrected.
In addition to the safety aspects achieved with Fail-Safe, it also provides:
- Isolation of the machine controls and sensor(s)- Isolation of high amperage and high voltage machine switching from the low voltage sensors- Conversion of a normally-open switch to required normally closed machine controls

Tapeswitch manufacturers safety light curtains, safety mats and safety Tapeswitches.

View Tapeswitch Products at Anderson-Bolds
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