440E-L13137 | Guardmaster Tongue Interlock Switch, 2 N/C Safety, 1 N/O Aux, M16
440E-L13137 Guardmaster tongue (key) operated safety interlock switch. 2 N/C safety contacts + 1 N/O aux, 270° head rotation, M16 cable entry, IP67, for machine guard monitoring.
Product Overview
The 440E-L13137 is a tongue-actuated (key-interlocked) safety switch from the Guardmaster 440E series, designed to monitor the position of machine guards and interlock access doors. It features 2 Normally Closed (N/C) safety contacts and 1 Normally Open (N/O) auxiliary contact, with a rotatable head (4×90° positions) for flexible mounting. The switch accepts a coded or standard tongue (ordered separately — typically 440E-Txxx) and is rated IP67 for washdown and harsh environments.
Technical Specifications (Electrical & Contacts)
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Parameter
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Specification
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Catalog Number
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440E-L13137
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Series
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Guardmaster 440E (Tongue Operated)
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Contact Configuration
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2 N/C (Safety) + 1 N/O (Auxiliary / Monitoring)
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Contact Rating
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10 A @ 240 V AC (AC-15), 6 A @ 24 V DC (DC-13)
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Rated Insulation Voltage (Ui)
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300 V AC
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Rated Impulse Withstand (Uimp)
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2.5 kV
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Mechanical Life
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1,000,000 operations (min.)
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Safety Category (EN ISO 13849-1)
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Can achieve Cat. 4 / PL e when used with a correctly wired safety relay or safety PLC
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Technical Specifications (Mechanical & Environmental)
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Parameter
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Specification
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Actuation Method
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Tongue (Key) Insertion — engages when guard closes
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Head Rotation
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4 Positions (0°, 90°, 180°, 270°) — set via captive screws
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Cable Entry
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M16 x 1.5 (Threaded Gland Hole — Gland not included)
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Housing Material
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Die-Cast Zinc / Reinforced Thermoplastic (Model Dependent — typically metal head, plastic body)
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Tongue (Key) Required
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Yes — ordered separately (e.g., 440E-Txxxxx series)
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Protection Rating
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IP67 (Dust-tight, temporary immersion)
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Operating Temperature
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-25 … +70 °C
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Standards
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EN ISO 13849-1, EN 1088, IEC 60947-5-1, UL 508, CSA C22.2 No.14
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Weight (Approx.)
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~0.25 kg
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Key Features
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Dual N/C Safety Contacts: Provides redundant positive-opening contacts for safety monitoring — both must open when the guard is opened to trigger a safe stop.
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Rotatable Head: 270° total adjustability in 90° increments allows the switch to be mounted in any orientation relative to the guard door swing.
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Auxiliary N/O Contact: Gives a separate signal for guard-closed indication or PLC status feedback without consuming a safety input.
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Tamper-Resistant Tongue Design: The tongue (key) is captured only when fully inserted — partial insertion will not close the safety contacts.
Applications
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Machine Guard Door Interlocking: Preventing access to hazardous areas (presses, conveyors, robotic cells) until the machine is safely stopped.
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Process Isolation: Ensuring covers on mixers, grinders, or slitters remain closed during operation.
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Retrofit Safety Upgrades: Replacing older non-safety interlocks in compliance-driven modernization projects.
Note: The tongue/key (440E-Txxxx) is ordered separately and selected based on door offset and actuator style (straight, angled, flexible). For a version with M12 quick-disconnect or stainless steel housing, see other 440E variants. Always wire N/C safety contacts in series with a safety relay or safety input — never bypass with jumpers.
About ACH
Founded in 2012, ACH is a top-tier distributor of industrial automation products, supplying genuine devices from leading brands like ABB, P+F, E&H, AB, MTL to emerging markets worldwide. Our mission is to provide 100% Genuine products at the most competitive prices, helping customers reduce costs and strengthen their market position.
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Frequently Ask & Questions
Are preferential prices available?
Long-term brand partners can get competitive product prices. At the same time, ACH controls the profit per order to 5%, providing the most competitive prices.
Are the Products Genuine OEM Units?
Yes, all products from ACH are certified genuine OEM units. We acquire our inventory through official OEM channels and trusted third-party suppliers, ensuring every item is authentic and reliable.
How will you arrange shipment?
We'll handle the shipping for you. Through our partnerships, we can secure competitive rates with major carriers like FedEx, DHL, TNT, and UPS, ensuring a smooth and cost-effective delivery.
What is the warranty of goods?
One-year Warranty.
How long is the logistics cycle of the product?
Products are divided into spot and futures, and the delivery period of different brands of products is also different. For details, please contact the ACH business manager.
