Tongue Interlock Safety Switches

Tongue interlock safety switches — mechanical safety devices for guarding doors, lids and enclosures, allowing access only with a tongue (key actuator). Made of AISI 316 stainless steel or cast aluminum, with spring contacts and locking mechanism to prevent unauthorized entry. Provide IP67/IP69K protection, compliant with EN ISO 14119, IEC 60947-5-1, PL e / SIL 3 safety level. Ideal for food, pharmaceutical, machine building and chemical industries with high security needs.

List of Tongue Interlock Safety Switch Types

TypeShort Description

TL-1-SS

Stainless steel 316, 2NC/1NO, standard tongue, IP67/IP69K — basic model for mechanical door locking.

TL-2-SS

Stainless steel 316, 3NC, reinforced lock, IP67/IP69K — for heavy-duty lids with monitoring.

TL-MAG-SS

Hybrid magnetic + tongue, 2NC/1NO, IP67/IP69K — contactless enhancement for wear-free operation.

TL-LED-SS

With LED status indication, 2NC/1NO, IP67/IP69K — for visual control in clean areas.

TL-AL

Cast aluminum, 1NC/1NO, standard tongue, IP67 — economical version for general use.

TL-LOCK

With electromagnetic lock (holding force 1000–2000 N), 2NC, IP67 — for doors with forced retention.

Specifications tongue interlock safety switches

• Housing material: AISI 316 stainless steel (Ra4 polishing) or cast aluminum — corrosion/washdown resistant (CIP/SIP).

• Contacts: 1NC/1NO, 2NC/1NO or 3NC with positive mechanical linkage; solid-state OSSD option.

• Tongue (actuator): Steel key (length 50–100 mm), compatible with locks; holding force up to 2000 N.

• Electrical parameters: 24–690 V AC/DC, up to 6 A, IP67/IP69K.

• Size: Compact housing (e.g., 80 × 30 × 40 mm), M4/M5 screw mounting.

• Temperature: -40…+100 °C; mechanical life >1 million cycles.

Advantages tongue interlock safety switches

Tongue mechanism with stainless steel provides:

• reliable tamper protection (key cannot be removed without locking);

• hygiene (FDA/EHEDG, smooth surface for CIP/SIP);

• high safety level (PL e / SIL 3, bypass-proof);

• versatility (compatible with electromagnetic locks for retention). Mechanical design ensures longevity in cyclic operations.

Applications tongue interlock safety switches

• Food industry: Door interlocks on conveyors, packaging lines.

• Pharmaceuticals: Lid protection in sterile zones.

• Chemical industry: Enclosures in aggressive environments (ATEX option).

• Machine building: Machine guards and robots.

Installation and connection tongue interlock safety switches

1. Mount housing on door/lid frame, insert tongue into slot.

2. Secure with M4/M5 screws, align (±1 mm).

3. Connect cable (standard 2 m, M12 option) to terminals. Maintenance — annual tongue and contact inspection.

Buy tongue interlock safety switches — fast delivery across Ukraine, certificates (EN ISO 14119), customization (locks/LED). CSC-AUTOMATION Phone: +38(044)494-33-55 E-mail: kck@kck.ua

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