DSWLS Wireless Travel Limit Switch is a rugged industrial wireless limit switch designed for machine travel, position and end-limit detection. It eliminates long signal cables and transmits limit-switch status wirelessly to a compatible Denki Seigyo receiver. With high mechanical durability and IP66/IP67 protection, DSWLS is suitable for conveyors, cranes, material-handling systems, industrial machinery and retrofit automation applications.
Key Features
- Wireless industrial limit switch
- Eliminates long signal cables between field device and control panel
- Long-range wireless communication
- Communication distance up to 1000 m in open conditions*
- Rugged industrial mechanical construction
- One-piece metal housing for demanding industrial environments
- IP66/IP67 protection
- Oil-resistant and water-resistant construction
- High mechanical durability
- Mechanical life up to 15 million operations
- Electrical life up to 500,000 operations
- Suitable for position, travel and end-limit detection
- Quick installation with reduced field wiring
- Suitable for difficult cable-routing locations
- Multiple wireless limit switches can be connected to a common receiver/network
- Ideal for retrofit applications where adding cables is difficult
*Actual wireless range depends on antenna arrangement, installation height, obstacles, electromagnetic interference and operating environment.
Wireless Limit Switch — DSWLS
Cable-Free Position Detection for Industrial Automation
Traditional limit switches require control cables from every field position back to the PLC, relay panel or control cabinet. This can become expensive and difficult when machines are spread over large areas or when cables must cross moving equipment, bridges, conveyors or other structures.
DSWLS-08 provides a wireless alternative by transmitting the ON/OFF state of the mechanical limit switch to a compatible Denki Seigyo wireless receiver.
This makes it particularly useful for remote machinery, moving equipment, conveyors, cranes, material-handling systems and retrofit projects where installing new control cables is inconvenient.
How DSWLS Works
Mechanical movement → Limit switch actuation → Wireless transmission → Denki Seigyo receiver → PLC / control system
When the machine mechanism reaches the configured travel position, the actuator operates the internal limit-switch contacts. The integrated wireless transmitter detects the change in switch state and sends the corresponding status to the receiver.
The receiver can then provide the signal to the machine control system.
Typical System
DSWLS Wireless Limit Switch
↓ Wireless Signal
Denki Seigyo Wireless Receiver
↓
PLC / Controller / Relay / Automation System
This architecture allows multiple remote limit switches to be integrated into a centralized monitoring or control system.
Product Advantages
Reduced Cabling
No need to run long signal cables from every limit-switch location to the main control cabinet.
Faster Installation
Wireless installation can significantly simplify projects where conventional cable routing is time-consuming.
Ideal for Difficult Locations
Suitable where cables cannot easily be installed because of:
- Moving machinery
- Long-distance equipment
- Bridges and structures
- Conveyors
- Rotating or travelling equipment
- Existing industrial plants
- Remote equipment
- Difficult cable-tray routes
Easy System Expansion
Additional wireless limit-switch detection points can be incorporated without installing a new long cable run for every additional position.
Lower Maintenance
Reducing field cabling can also reduce cable damage, cable-break faults and maintenance requirements in exposed machine areas.
Technical Specifications
| Parameter | DSWLS Specification |
| Product Type | Wireless Travel Limit Switch |
| Model | DSWLS-01, 02–08 |
| Switching Type | Mechanical Limit Switch |
| Wireless Communication | Industrial Wireless |
| Wireless Frequency | 470–510 MHz / 2.4 GHz* |
| Communication Range | Up to 1000 m, open environment* |
| Rated Contact Capacity | 15 A @ 250 VAC |
| Operating Speed | 1 mm/s to 2 m/s |
| Mechanical Operating Frequency | Up to 120 operations/min |
| Electrical Operating Frequency | Up to 30 operations/min |
| Contact Resistance | ≤ 15 mΩ initial |
| Insulation Resistance | ≥ 100 MΩ @ 500 VDC |
| Ambient Temperature | −10°C to +80°C |
| Humidity | Up to 95% RH |
| Mechanical Life | ≥ 15 million operations |
| Electrical Life | ≥ 500,000 operations |
| Protection Rating | IP66 / IP67 |
| Housing | Industrial metal construction |
| Application | Travel, position and end-limit detection |
DSWLS-08 Actuator Characteristics
For the -08 mechanical configuration, the corresponding reference data lists:
| Parameter | Value |
| Maximum Operating Force (OF) | 2720 gf |
| Minimum Release Force (RF) | 910 gf |
| Maximum Pre-Travel (PT) | 1.7 mm |
| Minimum Over-Travel (OT) | 4 mm |
| Maximum Movement Differential (MD) | 1 mm |
| Operating Position (OP) | 44.5 ± 0.8 mm |
Mechanical Construction
DSWLS-08 is designed for industrial environments where the limit switch may be exposed to vibration, dust, oil and moisture.
Rugged Housing
The industrial metal housing provides mechanical protection for the switching mechanism and wireless electronics.
Sealed Construction
The protected housing helps the switch operate reliably in industrial environments where dust, water and oil exposure can occur.
High Mechanical Durability
The mechanical switching mechanism is designed for frequent machine-position detection, with the reference specification indicating more than 15 million mechanical operations.
Mechanical Dimension
Applications
Conveyor Systems
Detect conveyor travel positions, end positions and equipment movement without installing long signal cables.
Cranes & Hoists
Wireless position detection for travelling cranes, hoists and material-handling systems.
Industrial Machinery
Monitor machine travel, door position, end-of-stroke position and mechanical movement.
Material Handling Equipment
Suitable for automated material-transfer and handling equipment.
Remote Equipment
Useful for machines located far away from the main control cabinet.
Retrofit Projects
An excellent option where existing machinery requires additional limit-switch points without major cable-routing modifications.
Automated Production Lines
Provide wireless position feedback to a centralized control system.
Large Industrial Plants
Useful where cable routing between field devices and control rooms is expensive or difficult.
Why Choose a Wireless Limit Switch?
| Conventional Wired Limit Switch | DSWLS Wireless Limit Switch |
| Requires signal cable | Wireless signal transmission |
| Long cable runs required | Reduced field wiring |
| Cable trays may be required | Simplified installation |
| Cable damage can cause faults | Less exposed signal cabling |
| Expansion requires additional cables | Easier expansion |
| Difficult on moving equipment | Suitable for moving equipment |
| Higher installation effort | Faster field installation |
Wireless Limit Switch System
A typical Denki Seigyo wireless limit-switch system consists of:
DSWLS
Wireless Limit Switch / Transmitter
Detects mechanical movement and transmits the switch status.
DSWLS-R
Wireless Receiver
Receives the wireless signal and provides the corresponding output to the machine control system.
PLC / Controller
Processes the received limit-switch signal for machine control, interlocking, sequencing or monitoring.
Typical Applications
Machine End Position
DSWLS → Wireless Receiver → PLC
Conveyor End Detection
DSWLS → Wireless Receiver → Motor/PLC Control
Crane Travel Limit
DSWLS → Wireless Receiver → Crane Control Panel
Remote Machine Position
DSWLS → Wireless Receiver → SCADA/PLC
Model Designation
I recommend keeping the Denki Seigyo model numbering simple and expandable:
DSWLS-08
DSWLS = Denki Seigyo Wireless Limit Switch
08 = Mechanical actuator/configuration
For a complete product family, we could use:
| Model | Configuration |
| DSWLS-01 | Standard plunger type |
| DSWLS-02 | Roller plunger type |
| DSWLS-03 | Adjustable roller lever |
| DSWLS-04 | Standard roller lever |
| DSWLS-05 | Rotary lever type |
| DSWLS-07 | Long lever configuration |
| DSWLS-08 | Heavy-duty roller/lever configuration |
| DSWLS-09 | Extended/alternate actuator |
Ordering Information
DSWLS-08 – Wireless Travel Limit Switch
When ordering, specify:
- Model: DSWLS-08
- Wireless frequency
- Receiver model
- Required communication range
- Antenna configuration
- Output/receiver configuration
- Special environmental requirements, if applicable
Frequently Asked Questions
What is a wireless limit switch?
A wireless limit switch is a mechanical limit switch with an integrated wireless transmitter. It detects the position or movement of machinery and sends the switching signal wirelessly to a compatible receiver, eliminating the need for a long signal cable.
What is the DSWLS-08 used for?
The DSWLS-08 Wireless Travel Limit Switch is used for machine travel detection, end-position detection, position monitoring and mechanical movement detection in industrial automation systems.
How does the DSWLS-08 wireless limit switch work?
When the machine operates the mechanical actuator, the internal limit-switch contact changes state. The integrated wireless transmitter sends this status to a compatible Denki Seigyo wireless receiver, which can then provide the signal to a PLC or control system.
What is the communication range of DSWLS-08?
The wireless system can provide communication over long distances, with the actual range depending on the wireless frequency, antenna, installation environment, obstacles and electromagnetic interference.
Does DSWLS-08 require a signal cable?
No. The switching signal between the DSWLS-08 and compatible wireless receiver is transmitted wirelessly, significantly reducing field signal wiring.
Can DSWLS-08 be connected to a PLC?
Yes. The DSWLS-08 communicates with a compatible Denki Seigyo wireless receiver, which can provide an appropriate output interface for connection to a PLC or industrial controller.
Can multiple DSWLS-08 limit switches be used with one receiver?
Yes. A wireless system can be configured to receive signals from multiple wireless limit switches, depending on the selected Denki Seigyo receiver and system configuration.
Where can DSWLS-08 be used?
DSWLS-08 is suitable for conveyors, cranes, hoists, material-handling equipment, industrial machinery, travelling equipment, automated production systems and retrofit applications.
Is DSWLS-08 suitable for outdoor industrial applications?
The switch is designed with a rugged industrial enclosure and high ingress protection. Its suitability for a particular outdoor installation depends on the complete system configuration and environmental conditions.
What is the mechanical life of DSWLS-08?
The mechanical switching mechanism is designed for high-frequency industrial operation, with the reference configuration offering a mechanical life of up to 15 million operations.
What is the protection rating of DSWLS-08?
The mechanical limit-switch configuration is designed with IP66/IP67 protection, providing resistance against dust and water ingress when correctly installed.
What are the main advantages of a wireless limit switch?
The main advantages include reduced cabling, simpler installation, lower wiring requirements, easier retrofit installation, reduced cable damage and flexible placement of limit switches.
Can DSWLS-08 replace a conventional wired limit switch?
Yes. DSWLS-08 can be used as a wireless alternative to conventional wired limit switches in applications where the control signal can be transmitted through the Denki Seigyo wireless receiver system.
Is DSWLS-08 suitable for moving machinery?
Yes. Wireless communication makes DSWLS-08 particularly useful for travelling and moving machinery where conventional cables can become difficult to route or susceptible to mechanical wear.
What receiver is required for DSWLS-08?
DSWLS-08 should be paired with a compatible Denki Seigyo wireless receiver designed to receive and process the DSWLS wireless signal. The exact receiver should be selected according to the required number of inputs and output configuration.
How do I order the DSWLS-08?
To order DSWLS-08, specify the DSWLS-08 model, required wireless configuration, receiver requirements, communication range and any application-specific requirements.
Can DSWLS-08 be used for safety functions?
DSWLS-08 should not be considered a safety-rated device unless the complete Denki Seigyo system has been specifically designed, validated and certified for the required safety function.
