Product Overview
The TZ-8111 is a vertical limit switch equipped with a plunger actuator. It is used for mechanical position detection, stroke limit control, and machine operation feedback in industrial automation equipment. The plunger actuator is suitable for applications where a moving machine part directly presses the actuator along a controlled travel direction.
This page describes model TZ-8111 only. The product is suitable for machine tools, automation mechanisms, conveyors, packaging machines, door mechanisms, elevator-related mechanisms, and other industrial control systems that require direct mechanical position sensing.
Key Technical Data
| Item | TZ-8111 |
|---|---|
| Product type | Vertical limit switch |
| Actuator type | Plunger actuator |
| Contact form | 1NO + 1NC |
| NO terminal | 13–14 |
| NC terminal | 11–12 |
| Protection degree | IP65 |
| Operating force | 900 g max. |
| Release force | 150 g min. |
| Pre-travel | 1.5 mm max. |
| Overtravel | 4 mm min. |
| Movement differential | 1 mm max. |
| Operating position | 26±0.8 mm |
| Electrical life | 500,000 operations or above |
Product Display
The TZ-8111 uses a vertical switch body with a plunger actuator. The product structure includes a reinforced housing, aluminum alloy mounting base, plunger mechanism, terminal cover, and conduit section for wiring.
Features
- Double-circuit contact structure for NO and NC control logic.
- Plunger actuator for direct mechanical position detection.
- Suitable for applications with controlled linear pressing movement.
- Built-in contact box with double-spring mechanism for stable contact action.
- Reinforced plastic housing and aluminum alloy base for mechanical strength.
- Compact body structure suitable for industrial equipment installation.
- Water-proof and oil-proof construction for general industrial environments.
- IP65 protection degree when properly installed and sealed.
- Conduit design for convenient field wiring.
- The TZ-8 series provides other actuator configurations for different machine structures. This page focuses on the TZ-8111 plunger type.
Drawing
Outline and Mounting Dimensions
The drawing is used to confirm the outline structure, mounting hole position, plunger travel direction, actuator clearance, and cable entry direction of the TZ-8111. Before installation, check that the moving mechanical part can press the plunger straight and smoothly without side load or excessive impact.
Before installation, check the mounting hole position, actuator clearance, cable entry direction, and operating position of the plunger. The actuator should be pressed by the moving mechanical part along the correct direction and must be allowed to return reliably after operation.
Contact Form
TZ-8111 uses a double-circuit contact structure with one normally open contact and one normally closed contact. The normally open contact uses terminals 13–14 and closes when the actuator is operated. The normally closed contact uses terminals 11–12 and opens when the actuator is operated.
Wiring logic should be selected according to the control circuit. Safety-related circuits often use NC logic, but the final selection should follow the electrical design of the equipment.
Ratings
Rated Load Table
| Rated
Voltage |
Resistance
Load NC |
Resistance
Load NO |
Lamp
Load NC |
Lamp
Load NO |
Inductive
Load NC |
Inductive
Load NO |
Motor
Load NC |
Motor
Load NO |
|---|---|---|---|---|---|---|---|---|
| 125VAC | 5A | 5A | 1.5A | 0.7A | 3A | 3A | 2A | 1A |
| 250VAC | 5A | 5A | 1A | 0.5A | 3A | 3A | 1.5A | 0.8A |
| 8VDC | 5A | 5A | 3A | 3A | 5A | 4A | 3A | 3A |
| 14VDC | 5A | 5A | 3A | 3A | 4A | 4A | 3A | 3A |
| 30VDC | 5A | 5A | 3A | 3A | 4A | 4A | 3A | 3A |
| 125VDC | 0.4A | 0.4A | – | – | – | – | – | – |
| 250VDC | 0.2A | 0.2A | – | – | – | – | – | – |
Load Notes
- Inrush current: NC below 24A, NO below 12A.
- Inductive load has a power factor of 0.4 minimum for AC and a time constant of 7 ms maximum for DC.
- Lamp load inrush current is approximately 10 times the steady-state current.
- Motor load inrush current is approximately 6 times the steady-state current.
- For inductive, lamp, or motor loads, the inrush current should be considered during circuit design.
Specifications
Electrical
| Item | Specification |
|---|---|
| Contact resistance | 25 mΩ max., initial value |
| Insulation resistance | 100 MΩ min. at 500 VDC |
| Dielectric strength 1 | 1000 VAC, 50/60 Hz for 1 minute between terminals of the same polarity |
| Dielectric strength 2 | 1500 VAC, 50/60 Hz for 1 minute between current-carrying and non-current-carrying metal parts |
| Dielectric strength 3 | 1500 VAC, 50/60 Hz for 1 minute between each terminal and ground |
| Electrical life | 500,000 operations or above |
Mechanical
| Item | Specification |
|---|---|
| Operating speed | 0.5 mm to 0.5 m/s |
| Operating frequency | Electrical: 30 operations/min |
| Vibration | 10–55 Hz, 1.5 mm double amplitude |
| Shock durability | 1000 m/s², approx. 100G |
| Shock malfunction | 300 m/s², approx. 30G |
| Weight | About 130 to 190 g |
Environmental
| Item | Specification |
|---|---|
| Ambient temperature | -5°C to +65°C, with no icing |
| Humidity | <95% RH |
| Degree of protection | IP65 |
Operating Characteristics
The following operating characteristics apply to model TZ-8111 only. The plunger stroke and operating position should be checked according to the installation direction and the moving part of the machine.
| Parameter | Description | TZ-8111 |
|---|---|---|
| OF | Operating force, maximum | 900 g |
| RF | Release force, minimum | 150 g |
| PT | Pre-travel, maximum | 1.5 mm |
| OT | Overtravel, minimum | 4 mm |
| MD | Movement differential, maximum | 1 mm |
| OP | Operating position | 26±0.8 mm |
Selection Guide
Actuator and Motion Direction
TZ-8111 uses a plunger actuator. It is suitable when the moving mechanical part presses the actuator directly in a controlled linear direction. The plunger should not receive side load, bending force, or heavy impact from an incorrect angle.
Electrical Load and Contact Rating
Before selecting TZ-8111, confirm whether the circuit is AC or DC, the operating voltage, current, load type, and whether the control system uses NO or NC logic. For motor, lamp, or inductive loads, select the switch according to the inrush current and not only the steady-state current.
Stroke, Overtravel and Reset
For TZ-8111, the pre-travel is 1.5 mm maximum, overtravel is 4 mm minimum, movement differential is 1 mm maximum, and operating position is 26±0.8 mm. The moving part must press the plunger reliably without exceeding the usable travel range. After actuation, the plunger must return smoothly to its original position.
Installation Environment
TZ-8111 has an IP65 protection degree and is suitable for industrial environments with dust, oil mist, and light water exposure. It is not designed for continuous immersion. Avoid direct high-pressure water jet unless additional protection is used. The cable entry must be properly sealed.
Wiring and Contact Logic
The normally open contact uses terminals 13–14, and the normally closed contact uses terminals 11–12. Select the contact logic according to the control circuit. Safety or fault-detection circuits often use NC logic, but the final wiring method must follow the machine electrical design.