Tongue Interlock Safety Switches

Tongue interlock safety switches — mechanical safety devices for reliable guarding of doors, lids and enclosures. Access only with tongue (key actuator), preventing unauthorized opening. Made of AISI 316 stainless steel (Ra4 polishing) or cast aluminum, with spring contacts and locking mechanism. 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.

List of Tongue Interlock Safety Switch Types

TypeShort Description

TL-1-SS

Stainless steel 316, 2NC/1NO, standard tongue, IP67/IP69K — basic hygienic model.

TL-2-SS

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

TL-AL

Cast aluminum, 1NC/1NO, standard tongue, IP67 — economical general-purpose version.

TL-MAG-SS

Hybrid magnetic + tongue, 2NC/1NO, IP67/IP69K — contactless enhancement.

TL-LED-SS

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

TL-LOCK-SS

With electromagnetic lock (1000–2000 N holding), 2NC, IP67/IP69K — for forced retention.

Specifications tongue interlock safety switches

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

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

• Tongue: Steel key (50–100 mm), lock-compatible; holding force up to 2000 N.

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

• Size: Standard housing (e.g., 90 × 40 × 40 mm), M5 screw mounting.

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

Advantages tongue interlock safety switches

Tongue mechanism provides:

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

• hygiene (FDA/EHEDG, CIP/SIP);

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

• versatility (electromagnetic locks, LED, magnetic add-on). Reliable mechanical design for intensive cycles.

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, robots.

Installation and connection tongue interlock safety switches

1. Mount housing on frame, insert tongue into slot.

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

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

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

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