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Allen Bradley Guardmaster Safety Relays 440G-LZS21STRH

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440G-LZS21STRH

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The 440G-LZS21STRH is a locking switch from Allen Bradley's Guardmaster Safety Relays series. Designed for reliable safety applications, this switch features an output configuration consisting of two safety outputs and one auxiliary output.

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Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

Technical specifications for 440G-LZS21STRH

ManufacturerAllen Bradley
Product TypeLocking Switch
Product LineGuardmaster Safety Relays
Part Number440G-LZS21STRH
Weight1.56 lbs (0.71 kg)
UPC887172782688
Output ConfigurationTwo safety outputs and one auxiliary output
Lock TypePower to release
Auxiliary TypeDoor proximity
Nominal Supply Voltage24 Volts DC
Actuator CodeStandard coding
Connection Type8-pin Quick Disconnect connector
Power Consumption2.5 Watts
Mounting TypeBracket mount
Off Response Time100 milliseconds for the first switch and an additional 50 milliseconds for the subsequent switch
Impulse Withstand Voltage1 kilovolt
Insulation Voltage75 Volts
Maximum Output Current200 milliamperes for each output
Mechanical Life Span500,000 cycles
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The 440G-LZS21STRH locking switch, crafted by Allen Bradley, serves as a critical component in safety relay applications. This device is designed with a robust power-to-release locking mechanism to enhance operational efficiency. It is equipped with an output setup that features two safety outputs along with one auxiliary output, enhancing functionality in a variety of safety-related tasks.

Operating at a nominal supply voltage of 24 Volts DC, this switch utilizes standard actuator coding, ensuring compatibility in diverse environments. Connection is facilitated through an 8-pin quick disconnect connector, simplifying installation and maintenance. A low power consumption of just 2.5 Watts allows for efficient energy use.

The locking switch supports an off response time of 100 milliseconds for the first switch activation, followed by an additional 50 milliseconds for subsequent switches. This quick response time is essential in safety applications where timing is critical. Furthermore, with a maximum output current of 200 milliamperes per output, it can effectively manage power distribution.

Designed for durability, the mechanical lifespan reaches an impressive 500,000 cycles, making it ideal for long-term use. It also boasts an impulse withstand voltage of 1 kilovolt, allowing the unit to endure transient voltage spikes. Additionally, an insulation voltage rating of 75 volts provides a secure operating environment, ensuring the safety of connected circuits during operation.