Product Description
The CPST1.5/3L6-60V is a compact and high-reliability industrial interface relay module designed for signal switching, electrical isolation, and control interfacing in automation systems.
It is used to connect low-voltage control circuits (such as PLC outputs, sensors, and controllers) with field devices operating at higher or separate voltage levels, ensuring safe isolation and reliable switching performance.
This module is widely used in industrial automation panels, machine control systems, electrical distribution cabinets, and process control applications, where stable signal handling and protection are critical.
The CPST series is engineered for high efficiency, compact installation, and long operational life, making it ideal for modern industrial wiring systems.
Working Principle
The CPST1.5/3L6-60V works as an interface switching relay module.
When a low-voltage control signal (6–60V AC/DC) is applied to the input side, the internal relay or electronic switching circuit activates and changes the state of the output contacts.
This enables the module to safely control higher power circuits while keeping the control side fully electrically isolated from the load side.
This isolation protects sensitive PLCs and controllers from voltage spikes, noise, and electrical faults.
Key Features
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Wide control voltage range (6–60V AC/DC)
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High electrical isolation between input and output
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Compact DIN rail mounting design
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Reliable industrial-grade switching performance
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LED status indication for monitoring
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Flame-retardant durable housing
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Low power consumption
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High resistance to electrical noise and interference
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Long service life with stable performance
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Suitable for continuous industrial operation
Technical Specifications
General Information
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Model: CPST1.5/3L6-60V
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Product Type: Industrial Interface Relay Module
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Application: Signal switching and isolation in automation systems
Electrical Specifications
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Rated Input Voltage: 6–60V AC/DC
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Operating Voltage Range: Approx. ±10–15% tolerance
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Frequency: 50/60 Hz
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Power Consumption: Low power interface module
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Output Type: Relay / switching contact output
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Contact Configuration: SPDT (Changeover type)
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Switching Voltage: Up to 250V AC / 30V DC
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Switching Current: 1A to 2A (signal level applications)
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Isolation Strength: High dielectric isolation between input and output
Input / Output Details
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Input Type: Low voltage control signal (6–60V AC/DC)
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Input Protection: Surge and noise suppression built-in
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Output Type: Dry contact relay output
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Output Function: Signal switching / control interface
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LED Indicator: Yes (input status indication)
Mechanical Specifications
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Mounting Type: DIN Rail 35 mm standard
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Housing Material: Polyamide PA66 (Flame Retardant grade)
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Flammability Rating: UL94 V0 equivalent
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Connection Type: Screw clamp terminal system
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Design Type: Compact modular interface relay
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Color: Industrial grey/blue housing
Environmental Specifications
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Operating Temperature: -20°C to +60°C
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Storage Temperature: -40°C to +85°C
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Humidity Range: 5% to 95% non-condensing
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Vibration Resistance: High industrial resistance
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Pollution Degree: 2
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Installation Environment: Indoor control panels
Safety Features
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Electrical isolation between input and output
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Protection against electrical noise and spikes
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Flame-retardant housing material
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Safe low-voltage control interface
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Stable switching under continuous load
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Designed for industrial safety compliance
Design Features
The CPST1.5/3L6-60V is designed with a compact modular structure, making it ideal for high-density wiring in control panels.
Its DIN rail mounting system allows quick installation and replacement without disturbing adjacent wiring.
The internal relay mechanism ensures fast response switching and stable operation, even in environments with electrical noise or fluctuating voltage conditions.
The LED indicator provides real-time status feedback, improving troubleshooting efficiency.
Applications
The CPST1.5/3L6-60V is widely used in industrial automation and electrical systems:
1. Industrial Automation
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PLC input/output interfacing
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Machine automation systems
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Process control systems
2. Electrical Control Panels
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Signal switching in control cabinets
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Motor control systems
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Distribution panel interfacing
3. Manufacturing Industry
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Production line automation
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Sensor-based switching systems
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Equipment control systems
4. Infrastructure Systems
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HVAC control systems
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Building automation systems
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Utility control systems
5. Safety & Monitoring
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Alarm systems
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Monitoring circuits
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Signal isolation applications
Advantages
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Ensures safe isolation between control and power circuits
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Protects PLC and sensitive electronics
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Improves system reliability and uptime
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Reduces wiring errors and maintenance costs
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Fast and stable switching response
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Compact and space-saving design
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Long service life in industrial environments
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Easy installation and replacement
Installation Guidelines
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Install on standard 35 mm DIN rail
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Ensure correct input voltage (6–60V AC/DC)
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Tighten terminal connections properly
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Avoid overloading output contacts
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Maintain proper panel ventilation
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Use protective devices like fuses in input circuit
Maintenance Guidelines
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Periodic inspection of terminal connections
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Check LED indicator status regularly
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Ensure dust-free control panel environment
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Replace module if abnormal operation is observed
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Maintain proper ventilation inside panel
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Designed for long-term low-maintenance use
Engineering Summary
The CPST1.5/3L6-60V is a reliable industrial interface relay module designed for safe, efficient, and isolated signal switching in automation systems. It ensures protection of control systems while enabling smooth interfacing with field devices.
Its compact design, wide voltage range, and stable performance make it suitable for modern industrial control applications.
