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- 24 Optically Isolated Digital Inputs: Each input channel is isolated up to 2500 V, providing strong protection against voltage surges, ground loops, and electrical noise.
- 24 Relay Outputs: The panel integrates 24 independent relay output channels for switching external loads, actuators, or control circuits.
- High Isolation Voltage: 2500 V optical isolation ensures safe and interference-free operation in electrically noisy environments.
- Adjustable Switching Threshold: Input switching threshold can be configured between 3 V and 24 V DC, allowing compatibility with a wide range of logic levels and sensor outputs.
- Status Indication LEDs: Each input and output channel is equipped with an LED indicator for real-time status monitoring and troubleshooting.
- Dual 18-Pin Terminal Blocks: The panel features two 18-pin double terminal connectors for convenient wiring and secure field connections.
- Flat Ribbon Cable Interface: Includes a 1-meter flat ribbon cable with a 50-pin connector for easy integration with control modules, PLCs, or data acquisition systems.
- Compact Design: With dimensions of 220 × 132 × 15 mm, the panel offers a high channel density in a space-efficient layout suitable for control cabinets and DIN rail installations.
- Industrial-Grade Construction: Designed for durability and long-term reliability in demanding industrial environments.
- 24 Relay Outputs: The panel integrates 24 independent relay output channels for switching external loads, actuators, or control circuits.
- High Isolation Voltage: 2500 V optical isolation ensures safe and interference-free operation in electrically noisy environments.
- Adjustable Switching Threshold: Input switching threshold can be configured between 3 V and 24 V DC, allowing compatibility with a wide range of logic levels and sensor outputs.
- Status Indication LEDs: Each input and output channel is equipped with an LED indicator for real-time status monitoring and troubleshooting.
- Dual 18-Pin Terminal Blocks: The panel features two 18-pin double terminal connectors for convenient wiring and secure field connections.
- Flat Ribbon Cable Interface: Includes a 1-meter flat ribbon cable with a 50-pin connector for easy integration with control modules, PLCs, or data acquisition systems.
- Compact Design: With dimensions of 220 × 132 × 15 mm, the panel offers a high channel density in a space-efficient layout suitable for control cabinets and DIN rail installations.
- Industrial-Grade Construction: Designed for durability and long-term reliability in demanding industrial environments.
1. Product Overview
Product Name: Isolated 24 DI 24 DO Relay Panel
Model: AX755/24
Series: AX700 Series (Industrial I/O Interface Panels)
Article Number: AX755/24
Manufacturer: Axiom
The Axiom AX755/24 is a high-performance, optically isolated digital input and relay output interface panel designed for industrial automation, control systems, and signal conditioning applications. It provides 24 opto-isolated digital input channels and 24 relay output channels in a compact, robust form factor. The panel is engineered to ensure reliable signal isolation, electrical protection, and flexible interfacing between control logic and field devices.
2. Key Features
- 24 Optically Isolated Digital Inputs: Each input channel is isolated up to 2500 V, providing strong protection against voltage surges, ground loops, and electrical noise.
- 24 Relay Outputs: The panel integrates 24 independent relay output channels for switching external loads, actuators, or control circuits.
- High Isolation Voltage: 2500 V optical isolation ensures safe and interference-free operation in electrically noisy environments.
- Adjustable Switching Threshold: Input switching threshold can be configured between 3 V and 24 V DC, allowing compatibility with a wide range of logic levels and sensor outputs.
- Status Indication LEDs: Each input and output channel is equipped with an LED indicator for real-time status monitoring and troubleshooting.
- Dual 18-Pin Terminal Blocks: The panel features two 18-pin double terminal connectors for convenient wiring and secure field connections.
- Flat Ribbon Cable Interface: Includes a 1-meter flat ribbon cable with a 50-pin connector for easy integration with control modules, PLCs, or data acquisition systems.
- Compact Design: With dimensions of 220 × 132 × 15 mm, the panel offers a high channel density in a space-efficient layout suitable for control cabinets and DIN rail installations.
- Industrial-Grade Construction: Designed for durability and long-term reliability in demanding industrial environments.
3. Technical Specifications
- Model: AX755/24
- Manufacturer: Axiom
- Type: Isolated Digital I/O Relay Panel
- Input Channels: 24 optically isolated digital inputs
- Output Channels: 24 relay outputs
- Isolation Voltage: 2500 V (optical isolation between input and output circuits)
- Input Voltage Range: 3–24 V DC (adjustable switching threshold)
- Output Type: Relay contacts (mechanical switching)
- Connectors:
- 2 × 18-pin double terminal blocks for field wiring
- 1 × 50-pin flat ribbon cable connector (IDC type)
- Cable: 1-meter flat ribbon cable included
- Indicators: LED indicators for each input and output channel
- Dimensions: 220 mm (W) × 132 mm (H) × 15 mm (D)
- Weight: Approx. 0.5–0.7 kg (typical, depending on configuration)
- Material: Industrial-grade PCB with protective coating; terminal blocks and connectors made of high-durability thermoplastic
- Mounting: Panel or DIN rail compatible (depending on enclosure configuration)
- Operating Voltage: Typically 24 V DC for control logic and relay coil operation
- Relay Contact Rating: Typically up to 2 A at 30 V DC or 0.5 A at 125 V AC (depending on relay specification)
- Operating Temperature Range: 0 °C to +55 °C (typical industrial range)
- Storage Temperature Range: -20 °C to +70 °C
- Humidity: 10–90% RH, non-condensing
4. Functionality
The Axiom AX755/24 functions as an interface module between low-voltage control logic (such as PLCs, microcontrollers, or data acquisition systems) and high-voltage or high-current field devices.
- Digital Input Function:
Each of the 24 digital input channels receives signals from sensors, switches, or external control devices. The opto-isolation circuitry converts and transmits the signal to the control system while electrically isolating the input source. This prevents ground loops and protects sensitive electronics from voltage spikes.
- Relay Output Function:
The 24 relay outputs act as electrically isolated switches that can control external loads such as solenoids, lamps, contactors, or other actuators. Each relay can be independently controlled by the connected logic system through the 50-pin ribbon cable interface.
- Adjustable Threshold:
The input switching threshold (3–24 V DC) allows the panel to adapt to various signal levels, making it compatible with TTL, CMOS, or industrial 24 V logic systems.
- LED Indicators:
Each channel’s LED provides immediate visual feedback of the input or output state, simplifying diagnostics and system monitoring.
Typical Applications:
- Industrial automation and process control
- PLC and DCS I/O expansion
- Machine control panels
- Signal isolation and conditioning
- Laboratory and test equipment interfaces
- Building automation and energy management systems
Compatibility:
The AX755/24 is compatible with standard 50-pin I/O interfaces used by many PLCs, DAQ cards, and industrial controllers. It can be integrated into systems using Axiom’s own I/O modules or third-party hardware with matching pin assignments.
5. Components & Accessories
Included Items:
- AX755/24 relay panel (main unit)
- 1-meter flat ribbon cable with 50-pin IDC connector
- Two 18-pin double terminal blocks (pre-installed)
- Integrated LED indicators for all channels
Optional Accessories:
- DIN rail mounting kit (if required for cabinet installation)
- Replacement ribbon cables (various lengths)
- Protective enclosure or cover plates
- Relay replacement modules (for maintenance)
Connectors:
- Input/Output Interface: 50-pin IDC connector (standard flat cable interface)
- Field Wiring: Dual 18-pin terminal blocks for secure screw-type connections
6. Installation & Setup
Requirements:
- 24 V DC power supply for relay coil and logic operation
- Compatible control system with 50-pin I/O interface
- Proper grounding and shielding for noise immunity
Mounting Options:
- Panel mounting using screws or standoffs
- DIN rail mounting (with optional adapter)
Configuration Steps:
1. Mount the panel securely in the control cabinet or on a DIN rail.
2. Connect the 50-pin ribbon cable between the AX755/24 and the control system’s I/O port.
3. Wire the field devices (sensors, switches, actuators) to the terminal blocks according to the channel assignments.
4. Adjust the input switching threshold if necessary to match the signal voltage levels.
5. Power up the system and verify LED indicators for correct input/output operation.
Safety Considerations:
- Ensure isolation barriers are maintained between high-voltage and low-voltage circuits.
- Follow standard industrial wiring practices and local electrical codes.
- Disconnect power before servicing or wiring changes.
7. Performance & Capabilities
Speed:
- Input response time typically in the millisecond range (depending on optocoupler characteristics).
- Relay switching time typically 5–10 ms (mechanical relay response).
Capacity:
- 24 input and 24 output channels provide high-density I/O capability in a single module.
Efficiency:
- Opto-isolated design minimizes signal interference and ensures reliable data transmission.
- LED indicators consume minimal power while providing continuous status feedback.
Limitations:
- Relay outputs are mechanical and subject to wear over time; switching frequency should be limited to avoid premature contact degradation.
- Not suitable for high-speed pulse or PWM signal switching due to relay mechanical limitations.
- Requires external power supply for relay operation.
Reliability:
- Designed for continuous operation in industrial environments.
- High isolation voltage and robust construction enhance system safety and longevity.
8. Standards & Compliance
Certifications and Compliance:
- Designed in accordance with industrial safety and EMC standards.
- Optical isolation rated at 2500 V for compliance with IEC insulation requirements.
- RoHS compliant (lead-free and environmentally safe materials).
- CE marking (where applicable) for conformity with European directives.
- Meets general industrial control equipment standards for reliability and safety.
Industry Standards:
- IEC 61010 (Safety requirements for electrical equipment for measurement, control, and laboratory use)
- IEC 60950 / EN 62368 (Information technology equipment safety)
- ISO 9001 manufacturing quality compliance (Axiom production standards)
9. Additional Information
Warranty:
- Standard manufacturer’s warranty (typically 12–24 months) covering defects in materials and workmanship.
Support:
- Technical documentation, wiring diagrams, and pin assignments available from Axiom’s support portal.
- Application notes and integration guides for PLC and DAQ systems.
- Email and phone support for configuration and troubleshooting.
Maintenance:
- Periodic inspection of relay contacts recommended for high-duty-cycle applications.
- Keep terminals clean and free from dust or oxidation.
- Replace relays as needed to maintain reliable switching performance.
Updates & Revisions:
- Firmware-independent hardware device (no software updates required).
- Product revisions may include improved relay components or updated terminal designs for enhanced durability.
Summary:
The Axiom AX755/24 Isolated 24 DI 24 DO Relay Panel is a versatile, industrial-grade interface solution that bridges digital control systems with field-level devices. Its combination of 24 optically isolated inputs and 24 relay outputs, adjustable input thresholds, and robust electrical isolation make it ideal for automation, monitoring, and control applications. With its compact design, LED diagnostics, and standardized 50-pin interface, the AX755/24 simplifies system integration while ensuring safety, reliability, and long-term performance in demanding industrial environments.
Product Name: Isolated 24 DI 24 DO Relay Panel
Model: AX755/24
Series: AX700 Series (Industrial I/O Interface Panels)
Article Number: AX755/24
Manufacturer: Axiom
The Axiom AX755/24 is a high-performance, optically isolated digital input and relay output interface panel designed for industrial automation, control systems, and signal conditioning applications. It provides 24 opto-isolated digital input channels and 24 relay output channels in a compact, robust form factor. The panel is engineered to ensure reliable signal isolation, electrical protection, and flexible interfacing between control logic and field devices.
2. Key Features
- 24 Optically Isolated Digital Inputs: Each input channel is isolated up to 2500 V, providing strong protection against voltage surges, ground loops, and electrical noise.
- 24 Relay Outputs: The panel integrates 24 independent relay output channels for switching external loads, actuators, or control circuits.
- High Isolation Voltage: 2500 V optical isolation ensures safe and interference-free operation in electrically noisy environments.
- Adjustable Switching Threshold: Input switching threshold can be configured between 3 V and 24 V DC, allowing compatibility with a wide range of logic levels and sensor outputs.
- Status Indication LEDs: Each input and output channel is equipped with an LED indicator for real-time status monitoring and troubleshooting.
- Dual 18-Pin Terminal Blocks: The panel features two 18-pin double terminal connectors for convenient wiring and secure field connections.
- Flat Ribbon Cable Interface: Includes a 1-meter flat ribbon cable with a 50-pin connector for easy integration with control modules, PLCs, or data acquisition systems.
- Compact Design: With dimensions of 220 × 132 × 15 mm, the panel offers a high channel density in a space-efficient layout suitable for control cabinets and DIN rail installations.
- Industrial-Grade Construction: Designed for durability and long-term reliability in demanding industrial environments.
3. Technical Specifications
- Model: AX755/24
- Manufacturer: Axiom
- Type: Isolated Digital I/O Relay Panel
- Input Channels: 24 optically isolated digital inputs
- Output Channels: 24 relay outputs
- Isolation Voltage: 2500 V (optical isolation between input and output circuits)
- Input Voltage Range: 3–24 V DC (adjustable switching threshold)
- Output Type: Relay contacts (mechanical switching)
- Connectors:
- 2 × 18-pin double terminal blocks for field wiring
- 1 × 50-pin flat ribbon cable connector (IDC type)
- Cable: 1-meter flat ribbon cable included
- Indicators: LED indicators for each input and output channel
- Dimensions: 220 mm (W) × 132 mm (H) × 15 mm (D)
- Weight: Approx. 0.5–0.7 kg (typical, depending on configuration)
- Material: Industrial-grade PCB with protective coating; terminal blocks and connectors made of high-durability thermoplastic
- Mounting: Panel or DIN rail compatible (depending on enclosure configuration)
- Operating Voltage: Typically 24 V DC for control logic and relay coil operation
- Relay Contact Rating: Typically up to 2 A at 30 V DC or 0.5 A at 125 V AC (depending on relay specification)
- Operating Temperature Range: 0 °C to +55 °C (typical industrial range)
- Storage Temperature Range: -20 °C to +70 °C
- Humidity: 10–90% RH, non-condensing
4. Functionality
The Axiom AX755/24 functions as an interface module between low-voltage control logic (such as PLCs, microcontrollers, or data acquisition systems) and high-voltage or high-current field devices.
- Digital Input Function:
Each of the 24 digital input channels receives signals from sensors, switches, or external control devices. The opto-isolation circuitry converts and transmits the signal to the control system while electrically isolating the input source. This prevents ground loops and protects sensitive electronics from voltage spikes.
- Relay Output Function:
The 24 relay outputs act as electrically isolated switches that can control external loads such as solenoids, lamps, contactors, or other actuators. Each relay can be independently controlled by the connected logic system through the 50-pin ribbon cable interface.
- Adjustable Threshold:
The input switching threshold (3–24 V DC) allows the panel to adapt to various signal levels, making it compatible with TTL, CMOS, or industrial 24 V logic systems.
- LED Indicators:
Each channel’s LED provides immediate visual feedback of the input or output state, simplifying diagnostics and system monitoring.
Typical Applications:
- Industrial automation and process control
- PLC and DCS I/O expansion
- Machine control panels
- Signal isolation and conditioning
- Laboratory and test equipment interfaces
- Building automation and energy management systems
Compatibility:
The AX755/24 is compatible with standard 50-pin I/O interfaces used by many PLCs, DAQ cards, and industrial controllers. It can be integrated into systems using Axiom’s own I/O modules or third-party hardware with matching pin assignments.
5. Components & Accessories
Included Items:
- AX755/24 relay panel (main unit)
- 1-meter flat ribbon cable with 50-pin IDC connector
- Two 18-pin double terminal blocks (pre-installed)
- Integrated LED indicators for all channels
Optional Accessories:
- DIN rail mounting kit (if required for cabinet installation)
- Replacement ribbon cables (various lengths)
- Protective enclosure or cover plates
- Relay replacement modules (for maintenance)
Connectors:
- Input/Output Interface: 50-pin IDC connector (standard flat cable interface)
- Field Wiring: Dual 18-pin terminal blocks for secure screw-type connections
6. Installation & Setup
Requirements:
- 24 V DC power supply for relay coil and logic operation
- Compatible control system with 50-pin I/O interface
- Proper grounding and shielding for noise immunity
Mounting Options:
- Panel mounting using screws or standoffs
- DIN rail mounting (with optional adapter)
Configuration Steps:
1. Mount the panel securely in the control cabinet or on a DIN rail.
2. Connect the 50-pin ribbon cable between the AX755/24 and the control system’s I/O port.
3. Wire the field devices (sensors, switches, actuators) to the terminal blocks according to the channel assignments.
4. Adjust the input switching threshold if necessary to match the signal voltage levels.
5. Power up the system and verify LED indicators for correct input/output operation.
Safety Considerations:
- Ensure isolation barriers are maintained between high-voltage and low-voltage circuits.
- Follow standard industrial wiring practices and local electrical codes.
- Disconnect power before servicing or wiring changes.
7. Performance & Capabilities
Speed:
- Input response time typically in the millisecond range (depending on optocoupler characteristics).
- Relay switching time typically 5–10 ms (mechanical relay response).
Capacity:
- 24 input and 24 output channels provide high-density I/O capability in a single module.
Efficiency:
- Opto-isolated design minimizes signal interference and ensures reliable data transmission.
- LED indicators consume minimal power while providing continuous status feedback.
Limitations:
- Relay outputs are mechanical and subject to wear over time; switching frequency should be limited to avoid premature contact degradation.
- Not suitable for high-speed pulse or PWM signal switching due to relay mechanical limitations.
- Requires external power supply for relay operation.
Reliability:
- Designed for continuous operation in industrial environments.
- High isolation voltage and robust construction enhance system safety and longevity.
8. Standards & Compliance
Certifications and Compliance:
- Designed in accordance with industrial safety and EMC standards.
- Optical isolation rated at 2500 V for compliance with IEC insulation requirements.
- RoHS compliant (lead-free and environmentally safe materials).
- CE marking (where applicable) for conformity with European directives.
- Meets general industrial control equipment standards for reliability and safety.
Industry Standards:
- IEC 61010 (Safety requirements for electrical equipment for measurement, control, and laboratory use)
- IEC 60950 / EN 62368 (Information technology equipment safety)
- ISO 9001 manufacturing quality compliance (Axiom production standards)
9. Additional Information
Warranty:
- Standard manufacturer’s warranty (typically 12–24 months) covering defects in materials and workmanship.
Support:
- Technical documentation, wiring diagrams, and pin assignments available from Axiom’s support portal.
- Application notes and integration guides for PLC and DAQ systems.
- Email and phone support for configuration and troubleshooting.
Maintenance:
- Periodic inspection of relay contacts recommended for high-duty-cycle applications.
- Keep terminals clean and free from dust or oxidation.
- Replace relays as needed to maintain reliable switching performance.
Updates & Revisions:
- Firmware-independent hardware device (no software updates required).
- Product revisions may include improved relay components or updated terminal designs for enhanced durability.
Summary:
The Axiom AX755/24 Isolated 24 DI 24 DO Relay Panel is a versatile, industrial-grade interface solution that bridges digital control systems with field-level devices. Its combination of 24 optically isolated inputs and 24 relay outputs, adjustable input thresholds, and robust electrical isolation make it ideal for automation, monitoring, and control applications. With its compact design, LED diagnostics, and standardized 50-pin interface, the AX755/24 simplifies system integration while ensuring safety, reliability, and long-term performance in demanding industrial environments.
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