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    The
    440G-L07253 is an Allen-Bradley Guardmaster 440G-L series solenoid interlock safety switch, part of the Atlas 5 range, designed for machine guarding, operating on 230V AC/DC, featuring a "Power to Unlock" (or "Power to Release") function where power must be applied to release the guard lock, ensuring safety by preventing access until the machine stops. It uses a bi-stable solenoid for low power, offers high safety (Cat 4, SIL 3, PLe), and includes 2 NC/1 NO contacts for PLC integration. 
    Key Features & Functionality: 
    • Brand: Allen-Bradley Guardmaster (Rockwell Automation).
    • Type: Solenoid Interlock Safety Switch (Atlas 5 Series).
    • Function: Power to Unlock (PTU) / Power to Release (PTR) – power releases the guard.
    • Voltage: 230V AC/DC.
    • Safety Rating: High integrity, up to Category 4, SIL 3, PLe.
    • Contacts: 2 Normally Closed (NC) / 1 Normally Open (NO) for machine control/PLC.
    • Mechanism: Bi-stable solenoid minimizes power use, with minimal heat.
    • Application: Used to guard doors, ensuring they only open when the machine is safe. 
    How it Works (Power to Unlock): 
    1. Locked State (No Power): When the guard is closed and the machine is running, power is removed from the solenoid, locking the tongue in the switch.
    2. Unlocking: When power is applied to the solenoid (and the machine is stopped), it releases the internal lock, allowing the operator to remove the actuator (tongue) and open the guard.
    3. Safety: This prevents access to hazardous areas until the machine is truly safe, isolating power while the guard is open. 
    In essence, this device is a critical component in industrial safety systems, ensuring that personnel can't access dangerous machinery until it's completely powered down and the guard is physically unlocked by applying electrical power. 
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    440G-L07253 | Allen-Bradley | US


    Rockwell Automation
    https://www.rockwellautomation.com › ... › Products
    Rockwell Automation
    https://www.rockwellautomation.com › ... › Products
    Power Supplies Programmable Controllers Push Buttons & Signaling Devices ... Get Support. Technical Specifications. Drawings. Documents. Certifications.See more
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    Allen Bradley Guardmaster 440G-L Series Solenoid ...


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    RS Saudi
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    Allen Bradley Guardmaster 440G-L Series Solenoid Interlock Switch, Power to Unlock, 230V ac/dc, Actuator Included ; RS Stock No.: 443-8358 ; Brand: Allen Bradley ...See more
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    Allen Bradley 440G-L07253 Interlock Switch. $771.81. In stock. SKU. Allen Bradley 440G-L07253. Manufacturer. Rockwell/Allen Bradley. Be the first to review this ...See more

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    Brand new original 440G-L07253 · TLS-GD2 Power To Release 440G-L07253 · 440G-T Series Solenoid Interlock Switch 440G-L07253 · Power to Unlock 440G-L07253. 440G- ...

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    Buy Allen Bradley Guardmaster 440G-L Series Solenoid Interlock Switch, Power to Unlock, 230V ac/dc, Actuator Included 440G-L07253 or other Solenoid ...
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    440G-L Solenoid Interlock Switch Power To Unlock 230 V Ac/dc


    Enrgtech
    https://www.enrgtech.co.uk › product › 440G-L07253
    Enrgtech
    https://www.enrgtech.co.uk › product › 440G-L07253
    This is 440G-L Solenoid Interlock Switch Power to Unlock 230 V ac/dc manufactured by Allen Bradley Guardmaster. The manufacturer part number is 440G-L07253.

    440G Atlas 5 Allen‑Bradley


    Rockwell Automation
    https://www.rockwellautomation.com › safety-products
    Rockwell Automation
    https://www.rockwellautomation.com › safety-products
    It locks a machine guard closed until power is isolated then keeps the power isolated while the guard is open ... 440G-L07253 Guardmaster ...See more
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    Brand new original 440G-L07253 · TLS-GD2 Power To Release 440G-L07253 · 440G-T Series Solenoid Interlock Switch 440G-L07253 · Power to Unlock 440G-L07253. 440G- ...

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    WESCO Canada
    https://buy.wesco.ca › products › images › PDF
    WESCO Canada
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    PDF
    The Atlas 5 is a positive mode, tongue operated guard locking interlock switch that locks a machine guard closed until power is ... 440G-L07253. 440G-L07247. 440G ...See more

    ATLAS 5 SW. LEFT HAND LOCK 230V AC DC


    Scattergood & Johnson Ltd
    https://www.scatts.co.uk › guardmaster-440g-l07253-atla...
    Scattergood & Johnson Ltd
    https://www.scatts.co.uk › guardmaster-440g-l07253-atla...
    Supply Voltage. 230 V AC ; Actuator. Standard Actuator ; Safety Contacts. 2 N/C ; Auxiliary Contacts. 1 N/O ; Lock Operation. Power to Release.See more
    £626.46
    Missing: Unlock ‎| Show results with: Unlock

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