LOOKING FOR THE RIGHT
INDUSTRIAL SOLUTION?
Discover embedded, communication and automation solutions tailored to your application.
- 24 Isolated Relay Outputs: Provides 24 independent relay output channels for switching AC or DC loads.
- High Voltage and Current Capacity: Each relay channel supports up to 250 VAC / 5 A, enabling control of a wide range of industrial devices such as solenoids, contactors, lamps, and actuators.
- Galvanic Isolation: Electrical isolation between control logic and output circuits ensures protection against voltage spikes, ground loops, and electrical noise.
- Form A (Normally Open) Contacts: Each relay output uses a closing contact configuration (Schließkontakte), ideal for switching power to loads only when activated.
- Compact and Modular Design: The panel measures 220 × 132 × 15 mm, allowing efficient use of space in control cabinets or DIN-rail assemblies.
- Convenient Connectivity: Equipped with 2 × 18 double terminal blocks for secure wiring and easy maintenance.
- Ribbon Cable Interface: Includes a 1 m flat ribbon cable with a 50-pin connector, simplifying connection to controller boards or I/O modules.
- Industrial-Grade Reliability: Designed for continuous operation in demanding environments, with durable relay components and high-quality PCB construction.
- Plug-and-Play Integration: Compatible with Axiom I/O systems and other standard 50-pin digital output interfaces.
- Safety and Isolation: Provides electrical isolation between control and load sides, protecting sensitive electronics from high-voltage transients.
- High Voltage and Current Capacity: Each relay channel supports up to 250 VAC / 5 A, enabling control of a wide range of industrial devices such as solenoids, contactors, lamps, and actuators.
- Galvanic Isolation: Electrical isolation between control logic and output circuits ensures protection against voltage spikes, ground loops, and electrical noise.
- Form A (Normally Open) Contacts: Each relay output uses a closing contact configuration (Schließkontakte), ideal for switching power to loads only when activated.
- Compact and Modular Design: The panel measures 220 × 132 × 15 mm, allowing efficient use of space in control cabinets or DIN-rail assemblies.
- Convenient Connectivity: Equipped with 2 × 18 double terminal blocks for secure wiring and easy maintenance.
- Ribbon Cable Interface: Includes a 1 m flat ribbon cable with a 50-pin connector, simplifying connection to controller boards or I/O modules.
- Industrial-Grade Reliability: Designed for continuous operation in demanding environments, with durable relay components and high-quality PCB construction.
- Plug-and-Play Integration: Compatible with Axiom I/O systems and other standard 50-pin digital output interfaces.
- Safety and Isolation: Provides electrical isolation between control and load sides, protecting sensitive electronics from high-voltage transients.
1. Product Overview
Product Name: Isolated 24 DO Relay Panel (250 VAC)
Model: AX756B
Series: AX700 Series (Industrial I/O Expansion Modules)
Article Number: AX756B
Manufacturer: Axiom
The Axiom AX756B is a high-performance, isolated 24-channel digital output (DO) relay panel designed for industrial automation, control, and signal switching applications. It provides galvanically isolated relay outputs for interfacing control systems with high-voltage or high-current loads. The panel is engineered for reliability, safety, and ease of integration into PLC, DCS, or embedded control environments. With a compact form factor and robust construction, the AX756B is suitable for use in industrial cabinets, control panels, and distributed I/O systems where electrical isolation and dependable switching performance are critical.
2. Key Features
- 24 Isolated Relay Outputs: Provides 24 independent relay output channels for switching AC or DC loads.
- High Voltage and Current Capacity: Each relay channel supports up to 250 VAC / 5 A, enabling control of a wide range of industrial devices such as solenoids, contactors, lamps, and actuators.
- Galvanic Isolation: Electrical isolation between control logic and output circuits ensures protection against voltage spikes, ground loops, and electrical noise.
- Form A (Normally Open) Contacts: Each relay output uses a closing contact configuration (Schließkontakte), ideal for switching power to loads only when activated.
- Compact and Modular Design: The panel measures 220 × 132 × 15 mm, allowing efficient use of space in control cabinets or DIN-rail assemblies.
- Convenient Connectivity: Equipped with 2 × 18 double terminal blocks for secure wiring and easy maintenance.
- Ribbon Cable Interface: Includes a 1 m flat ribbon cable with a 50-pin connector, simplifying connection to controller boards or I/O modules.
- Industrial-Grade Reliability: Designed for continuous operation in demanding environments, with durable relay components and high-quality PCB construction.
- Plug-and-Play Integration: Compatible with Axiom I/O systems and other standard 50-pin digital output interfaces.
- Safety and Isolation: Provides electrical isolation between control and load sides, protecting sensitive electronics from high-voltage transients.
3. Technical Specifications
- Model: AX756B
- Type: Isolated 24-channel digital output relay panel
- Number of Channels: 24 relay outputs
- Relay Type: Electromechanical, Form A (normally open) contacts
- Contact Rating:
- Maximum Switching Voltage: 250 VAC
- Maximum Switching Current: 5 A per channel
- Isolation: Galvanic isolation between control and output circuits
- Connector Interface: 50-pin flat ribbon cable connector (IDC type)
- Cable Length: 1 m flat ribbon cable (included)
- Terminal Blocks: 2 × 18 double terminal blocks for output wiring
- Panel Dimensions: 220 mm (W) × 132 mm (H) × 15 mm (D)
- Weight: Approx. 0.5 – 0.7 kg (depending on configuration and cable)
- Material: Industrial-grade FR-4 PCB with protective coating; terminal blocks and connectors made of high-durability thermoplastic and tinned copper contacts
- Mounting: Panel or enclosure mounting (screw holes provided)
- Operating Voltage (Control Side): Typically 5 VDC or 24 VDC logic input (depending on controller interface)
- Operating Temperature Range: 0 °C to +55 °C (typical industrial range)
- Storage Temperature: −20 °C to +70 °C
- Humidity: 10 % – 90 % RH, non-condensing
- Insulation Resistance: ≥ 100 MΩ at 500 VDC
- Dielectric Strength: 1500 VAC between coil and contacts
- Contact Resistance: ≤ 100 mΩ (initial)
- Expected Relay Life:
- Mechanical: ≥ 10⁷ operations
- Electrical: ≥ 10⁵ operations at rated load
4. Functionality
The AX756B functions as an interface module that converts low-level digital control signals into high-voltage, high-current relay outputs. Each of the 24 channels operates independently, allowing simultaneous control of multiple loads. The relays are driven by control signals received through the 50-pin ribbon cable, which connects to a digital output card or controller.
When a control signal activates a channel, the corresponding relay closes its contact, completing the circuit and energizing the connected load. When the control signal is deactivated, the relay opens, disconnecting the load. The galvanic isolation ensures that any voltage surges or electrical noise on the load side do not affect the control electronics.
Typical Use Cases and Applications:
- Industrial automation systems
- PLC and DCS output expansion
- Machine control panels
- Process control and monitoring
- Building automation (lighting, HVAC, access control)
- Laboratory and test equipment switching
- Signal routing and load control in embedded systems
- Remote I/O expansion for SCADA systems
Compatibility:
The AX756B is compatible with Axiom digital output modules and other standard 50-pin I/O interfaces (e.g., Opto 22, Advantech, or similar pinouts). It can be integrated into existing control architectures using standard ribbon cable connections.
5. Components & Accessories
Included Items:
- AX756B relay output panel (assembled and tested)
- 1 m 50-pin flat ribbon cable (IDC connector)
- 2 × 18 double terminal blocks (pre-installed)
- Mounting holes for panel installation
Optional Accessories (available separately):
- Extended-length ribbon cables (up to 3 m)
- DIN-rail mounting brackets or panel adapters
- Replacement terminal blocks
- Protective covers or enclosures for harsh environments
- Relay replacement kits (for maintenance)
Connectors:
- Input Connector: 50-pin IDC male header for control signal input
- Output Terminals: 2 × 18 double terminal blocks for load wiring (screw-type)
- Cable Type: 1 m flat ribbon cable with 50-pin IDC female connector
6. Installation & Setup
Requirements:
- Compatible digital output controller or interface card with 50-pin connector
- Power supply suitable for relay coil voltage (typically 24 VDC)
- Proper enclosure or mounting surface for panel installation
Mounting Options:
- Direct panel mounting using pre-drilled holes
- Optional DIN-rail mounting with adapter brackets
- Installation inside control cabinets or electrical enclosures
Configuration Steps:
1. Mount the AX756B securely in the desired location.
2. Connect the 50-pin ribbon cable between the controller and the AX756B input connector.
3. Wire the load devices to the terminal blocks, ensuring correct polarity and voltage ratings.
4. Verify that the total load current per channel does not exceed 5 A and that the total panel load remains within safe limits.
5. Power on the control system and test each relay output for proper operation.
6. Label terminal connections for maintenance and troubleshooting.
Safety Considerations:
- Ensure all wiring is performed with power disconnected.
- Observe proper insulation and grounding practices.
- Use appropriate fuses or circuit breakers for load protection.
- Avoid exceeding rated voltage and current limits.
7. Performance & Capabilities
Switching Performance:
- Supports both AC and DC load switching up to 250 VAC / 5 A per channel.
- Fast relay response suitable for general-purpose control (typical operate time < 10 ms, release time < 5 ms).
- High isolation ensures minimal interference between channels.
Capacity and Efficiency:
- 24 independent channels allow simultaneous control of multiple devices.
- Efficient signal routing through ribbon cable minimizes wiring complexity.
- Low contact resistance ensures minimal power loss and heat generation.
Reliability:
- Industrial-grade relays rated for millions of mechanical operations.
- Robust PCB design with wide copper traces for current handling.
- High dielectric strength between control and load circuits.
Limitations:
- Not intended for switching extremely high inrush currents (e.g., large motors without protective circuits).
- Relay-based design limits switching frequency compared to solid-state outputs.
- Requires periodic relay inspection or replacement in high-duty-cycle applications.
8. Standards & Compliance
Certifications and Compliance:
- Designed in accordance with IEC and EN standards for industrial control equipment.
- Meets CE requirements for electromagnetic compatibility (EMC) and low-voltage directives.
- RoHS compliant (Restriction of Hazardous Substances).
- Conforms to UL and CSA component recognition standards (for relays and terminal blocks).
- Manufactured under ISO 9001 quality management system.
Industry Standards:
- IEC 60947-5-1 (Control circuit devices and switching elements)
- IEC 61010-1 (Safety requirements for electrical equipment for measurement, control, and laboratory use)
- EN 55022 / EN 55024 (EMC compliance)
9. Additional Information
Warranty:
- Standard manufacturer warranty: 12 months from date of purchase (extendable with service agreement).
- Covers defects in materials and workmanship under normal operating conditions.
Support:
- Technical documentation, wiring diagrams, and pinout charts available from Axiom’s support portal.
- Email and phone support for configuration and troubleshooting.
- Firmware and compatibility updates provided for associated controller modules.
Maintenance:
- Periodic inspection of relay contacts recommended for high-load applications.
- Clean terminal blocks and connectors to maintain reliable electrical contact.
- Replace relays after rated electrical life or if contact wear is observed.
Updates and Revisions:
- The AX756B is part of Axiom’s modular I/O product line, ensuring long-term availability and compatibility with future controller generations.
- Product revisions may include improved relay components or updated terminal designs while maintaining backward compatibility.
Summary
The Axiom AX756B Isolated 24 DO Relay Panel (250 VAC) is a robust, industrial-grade output interface designed for reliable switching of AC and DC loads in automation and control systems. With 24 isolated relay channels, each rated for 250 VAC / 5 A, it provides safe and efficient control of diverse electrical devices. Its compact 220 × 132 × 15 mm design, 50-pin ribbon cable interface, and dual terminal blocks simplify installation and integration. Built to meet stringent industrial standards, the AX756B ensures electrical isolation, operational safety, and long-term durability, making it an ideal choice for engineers and system integrators seeking dependable relay output solutions for industrial automation, process control, and equipment interfacing.
Product Name: Isolated 24 DO Relay Panel (250 VAC)
Model: AX756B
Series: AX700 Series (Industrial I/O Expansion Modules)
Article Number: AX756B
Manufacturer: Axiom
The Axiom AX756B is a high-performance, isolated 24-channel digital output (DO) relay panel designed for industrial automation, control, and signal switching applications. It provides galvanically isolated relay outputs for interfacing control systems with high-voltage or high-current loads. The panel is engineered for reliability, safety, and ease of integration into PLC, DCS, or embedded control environments. With a compact form factor and robust construction, the AX756B is suitable for use in industrial cabinets, control panels, and distributed I/O systems where electrical isolation and dependable switching performance are critical.
2. Key Features
- 24 Isolated Relay Outputs: Provides 24 independent relay output channels for switching AC or DC loads.
- High Voltage and Current Capacity: Each relay channel supports up to 250 VAC / 5 A, enabling control of a wide range of industrial devices such as solenoids, contactors, lamps, and actuators.
- Galvanic Isolation: Electrical isolation between control logic and output circuits ensures protection against voltage spikes, ground loops, and electrical noise.
- Form A (Normally Open) Contacts: Each relay output uses a closing contact configuration (Schließkontakte), ideal for switching power to loads only when activated.
- Compact and Modular Design: The panel measures 220 × 132 × 15 mm, allowing efficient use of space in control cabinets or DIN-rail assemblies.
- Convenient Connectivity: Equipped with 2 × 18 double terminal blocks for secure wiring and easy maintenance.
- Ribbon Cable Interface: Includes a 1 m flat ribbon cable with a 50-pin connector, simplifying connection to controller boards or I/O modules.
- Industrial-Grade Reliability: Designed for continuous operation in demanding environments, with durable relay components and high-quality PCB construction.
- Plug-and-Play Integration: Compatible with Axiom I/O systems and other standard 50-pin digital output interfaces.
- Safety and Isolation: Provides electrical isolation between control and load sides, protecting sensitive electronics from high-voltage transients.
3. Technical Specifications
- Model: AX756B
- Type: Isolated 24-channel digital output relay panel
- Number of Channels: 24 relay outputs
- Relay Type: Electromechanical, Form A (normally open) contacts
- Contact Rating:
- Maximum Switching Voltage: 250 VAC
- Maximum Switching Current: 5 A per channel
- Isolation: Galvanic isolation between control and output circuits
- Connector Interface: 50-pin flat ribbon cable connector (IDC type)
- Cable Length: 1 m flat ribbon cable (included)
- Terminal Blocks: 2 × 18 double terminal blocks for output wiring
- Panel Dimensions: 220 mm (W) × 132 mm (H) × 15 mm (D)
- Weight: Approx. 0.5 – 0.7 kg (depending on configuration and cable)
- Material: Industrial-grade FR-4 PCB with protective coating; terminal blocks and connectors made of high-durability thermoplastic and tinned copper contacts
- Mounting: Panel or enclosure mounting (screw holes provided)
- Operating Voltage (Control Side): Typically 5 VDC or 24 VDC logic input (depending on controller interface)
- Operating Temperature Range: 0 °C to +55 °C (typical industrial range)
- Storage Temperature: −20 °C to +70 °C
- Humidity: 10 % – 90 % RH, non-condensing
- Insulation Resistance: ≥ 100 MΩ at 500 VDC
- Dielectric Strength: 1500 VAC between coil and contacts
- Contact Resistance: ≤ 100 mΩ (initial)
- Expected Relay Life:
- Mechanical: ≥ 10⁷ operations
- Electrical: ≥ 10⁵ operations at rated load
4. Functionality
The AX756B functions as an interface module that converts low-level digital control signals into high-voltage, high-current relay outputs. Each of the 24 channels operates independently, allowing simultaneous control of multiple loads. The relays are driven by control signals received through the 50-pin ribbon cable, which connects to a digital output card or controller.
When a control signal activates a channel, the corresponding relay closes its contact, completing the circuit and energizing the connected load. When the control signal is deactivated, the relay opens, disconnecting the load. The galvanic isolation ensures that any voltage surges or electrical noise on the load side do not affect the control electronics.
Typical Use Cases and Applications:
- Industrial automation systems
- PLC and DCS output expansion
- Machine control panels
- Process control and monitoring
- Building automation (lighting, HVAC, access control)
- Laboratory and test equipment switching
- Signal routing and load control in embedded systems
- Remote I/O expansion for SCADA systems
Compatibility:
The AX756B is compatible with Axiom digital output modules and other standard 50-pin I/O interfaces (e.g., Opto 22, Advantech, or similar pinouts). It can be integrated into existing control architectures using standard ribbon cable connections.
5. Components & Accessories
Included Items:
- AX756B relay output panel (assembled and tested)
- 1 m 50-pin flat ribbon cable (IDC connector)
- 2 × 18 double terminal blocks (pre-installed)
- Mounting holes for panel installation
Optional Accessories (available separately):
- Extended-length ribbon cables (up to 3 m)
- DIN-rail mounting brackets or panel adapters
- Replacement terminal blocks
- Protective covers or enclosures for harsh environments
- Relay replacement kits (for maintenance)
Connectors:
- Input Connector: 50-pin IDC male header for control signal input
- Output Terminals: 2 × 18 double terminal blocks for load wiring (screw-type)
- Cable Type: 1 m flat ribbon cable with 50-pin IDC female connector
6. Installation & Setup
Requirements:
- Compatible digital output controller or interface card with 50-pin connector
- Power supply suitable for relay coil voltage (typically 24 VDC)
- Proper enclosure or mounting surface for panel installation
Mounting Options:
- Direct panel mounting using pre-drilled holes
- Optional DIN-rail mounting with adapter brackets
- Installation inside control cabinets or electrical enclosures
Configuration Steps:
1. Mount the AX756B securely in the desired location.
2. Connect the 50-pin ribbon cable between the controller and the AX756B input connector.
3. Wire the load devices to the terminal blocks, ensuring correct polarity and voltage ratings.
4. Verify that the total load current per channel does not exceed 5 A and that the total panel load remains within safe limits.
5. Power on the control system and test each relay output for proper operation.
6. Label terminal connections for maintenance and troubleshooting.
Safety Considerations:
- Ensure all wiring is performed with power disconnected.
- Observe proper insulation and grounding practices.
- Use appropriate fuses or circuit breakers for load protection.
- Avoid exceeding rated voltage and current limits.
7. Performance & Capabilities
Switching Performance:
- Supports both AC and DC load switching up to 250 VAC / 5 A per channel.
- Fast relay response suitable for general-purpose control (typical operate time < 10 ms, release time < 5 ms).
- High isolation ensures minimal interference between channels.
Capacity and Efficiency:
- 24 independent channels allow simultaneous control of multiple devices.
- Efficient signal routing through ribbon cable minimizes wiring complexity.
- Low contact resistance ensures minimal power loss and heat generation.
Reliability:
- Industrial-grade relays rated for millions of mechanical operations.
- Robust PCB design with wide copper traces for current handling.
- High dielectric strength between control and load circuits.
Limitations:
- Not intended for switching extremely high inrush currents (e.g., large motors without protective circuits).
- Relay-based design limits switching frequency compared to solid-state outputs.
- Requires periodic relay inspection or replacement in high-duty-cycle applications.
8. Standards & Compliance
Certifications and Compliance:
- Designed in accordance with IEC and EN standards for industrial control equipment.
- Meets CE requirements for electromagnetic compatibility (EMC) and low-voltage directives.
- RoHS compliant (Restriction of Hazardous Substances).
- Conforms to UL and CSA component recognition standards (for relays and terminal blocks).
- Manufactured under ISO 9001 quality management system.
Industry Standards:
- IEC 60947-5-1 (Control circuit devices and switching elements)
- IEC 61010-1 (Safety requirements for electrical equipment for measurement, control, and laboratory use)
- EN 55022 / EN 55024 (EMC compliance)
9. Additional Information
Warranty:
- Standard manufacturer warranty: 12 months from date of purchase (extendable with service agreement).
- Covers defects in materials and workmanship under normal operating conditions.
Support:
- Technical documentation, wiring diagrams, and pinout charts available from Axiom’s support portal.
- Email and phone support for configuration and troubleshooting.
- Firmware and compatibility updates provided for associated controller modules.
Maintenance:
- Periodic inspection of relay contacts recommended for high-load applications.
- Clean terminal blocks and connectors to maintain reliable electrical contact.
- Replace relays after rated electrical life or if contact wear is observed.
Updates and Revisions:
- The AX756B is part of Axiom’s modular I/O product line, ensuring long-term availability and compatibility with future controller generations.
- Product revisions may include improved relay components or updated terminal designs while maintaining backward compatibility.
Summary
The Axiom AX756B Isolated 24 DO Relay Panel (250 VAC) is a robust, industrial-grade output interface designed for reliable switching of AC and DC loads in automation and control systems. With 24 isolated relay channels, each rated for 250 VAC / 5 A, it provides safe and efficient control of diverse electrical devices. Its compact 220 × 132 × 15 mm design, 50-pin ribbon cable interface, and dual terminal blocks simplify installation and integration. Built to meet stringent industrial standards, the AX756B ensures electrical isolation, operational safety, and long-term durability, making it an ideal choice for engineers and system integrators seeking dependable relay output solutions for industrial automation, process control, and equipment interfacing.
No manuals/catalogs available.
No accessories available.
