SPECIFICATIONS

The CNTD CZ-8104N is a safety-rated vertical limit switch from the CZ-8N series. Its defining feature is the forced opening (positive opening) mechanism on the NC contact: when the plastic roller lever is actuated, the NC circuit is mechanically forced to break regardless of contact condition, providing fail-safe interruption of safety control circuits. This makes the CZ-8104N the right choice for crane anti-over-travel protection, machine guard interlocks, elevator safety limits, and emergency stop applications where a reliable, documented safety function is required by EN 60947-5-1.

The plastic roller lever actuator glides smoothly over cams, guide rails, and machine edges with minimal wear. With pretravel PT 20° (angular), overtravel OT 75°, total travel TT 95°, and movement differential MD 12°, the switch offers a wide detection window and smooth operation even with cam misalignment or speed variation. Operating force 7.5N provides dependable actuation in industrial vibration environments.

Model Designation

Key Specifications:

Model: CZ-8104N (CZ-8N Series)

Action Type: Plastic Roller Lever (self-resetting)

Safety Function: Forced opening on NC contact (positive opening, fail-safe)

Contact Configuration: 1NO + 1NC (Snap-Action)

Operating Force (OF): 7.5N

Pre-Travel (PT): 20° (angular)

Over-Travel (OT): 75° (angular)

Movement Differential (MD): 12° (angular)

Total Travel (TT): 95° (angular)

Rated Insulation Voltage (Ui): 300V

Rated Impulse Withstand Voltage (Uimp): 4kV

Conventional Thermal Current (Ith): 10A

Rating: 10A / 380V AC

AC-15 Rating: 6A / 250V (Resistive load)

DC-13 Rating: 0.3A / 220V (Resistive load)

Protection: IP65

Cable Entry: M12 cable gland tail sleeve

Contact Resistance: ≤25mΩ

Insulation Resistance: ≥100MΩ (at 500VDC)

Dielectric Strength: 1000VAC (between non-consecutive terminals) / 1500VAC (current-carrying vs non-current-carrying) / 1500VAC (terminals to ground), 50/60Hz, 1 min

Minimum Applicable Load: DC 24V / 10mA

Operating Speed: 5mm/s ~ 0.5m/s

Operating Frequency: 30 operations/min (electrical)

Ambient Temperature: -20°C ~ +70°C (no icing)

Humidity: ≤95% RH

Vibration Resistance: 10~55Hz, 1.5mm double amplitude

Shock Resistance: Mechanical: 1000m/s² (100G) / Malfunction: 300m/s² (30G)

Shell Material: Zinc alloy + reinforced plastic

Mechanical Life: ≥10,000,000 cycles (series)

Electrical Life: ≥500,000 cycles (250V/6A resistive)

Certification: CCC (GB/T 14048.5), CE (EN 60947-5-1), TUV (EN 60947-5-1)

Features:

• Safety-rated: forced opening on NC contact — NC circuit mechanically forced open on actuation (fail-safe)

• Compliant with EN 60947-5-1 (CE / TUV certified) and GB/T 14048.5 (CCC)

• Plastic roller lever actuator — smooth gliding, low wear on switch and target

• Large angular travel: PT 20° / OT 75° / TT 95° for wide detection window

• Double circuit 1NO+1NC snap-action contacts

• Double-spring built-in contact box for long mechanical life (10M+ cycles)

• Compact zinc alloy + reinforced plastic housing, waterproof & oil-proof, IP65

• M12 cable gland tail sleeve with conduit design for sealed cabling

• Self-resetting action — returns to original state automatically after target leaves

Applications:

Crane and hoist anti-over-travel (anti-drop) protection, machine tool positioning and limit control, elevator and lift safety limits, machine guard door interlocks, conveyor belt safety stops, packaging and bottling line monitoring, industrial robot safety guarding, printing and textile machinery, and any safety control circuit requiring a fail-safe forced-opening limit switch in vertical mounting. Suitable for indoor and sheltered outdoor industrial environments.

CZ-8104N vs TZ-8104 and Other Models:

CZ-8104N belongs to the CZ-8N series (vertical/safety series) — its key difference from the TZ-8 series equivalent TZ-8104 is the forced opening (positive opening) mechanism on the NC contact, making it suitable for safety circuits. If your application requires fail-safe interruption (safety relay, guard interlock, anti-over-travel), choose the CZ-8104N; if you only need general position detection, the TZ-8104 with identical roller lever action is the economical choice. Within the CZ-8N series, the CZ-8104N (plastic roller lever, this item) is complemented by CZ-8105N (metal roller lever, more durable for abrasive contact), CZ-8109N (adjustable ball lever), plunger types (CZ-8111N/8112N/8122N), and coil spring types (CZ-8166N/8167N/8168N/8169N).

Package Includes:

1 x CZ-8104N Safety Limit Switch

Note:

Please confirm your required model before ordering. The CZ-8N series offers multiple actuator types: CZ-8104N (plastic roller lever, this item), CZ-8105N (metal roller lever), CZ-8109N (adjustable ball lever), CZ-8111N (pin plunger), CZ-8112N (roller plunger), CZ-8122N (vertical roller plunger), CZ-8166N (plastic rod coil spring), CZ-8167N (coil spring), CZ-8168N (metal rod coil spring), CZ-8169N (tentacle type). All share the safety forced-opening NC design and IP65 protection. Contact us for bulk pricing and technical support.