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- Dry Contact Relay Output: Provides a mechanical relay interface with isolated contacts, suitable for switching both AC and DC loads.
- Digital Output Module: Designed for digital control systems, PLCs, and microcontroller-based automation platforms.
- Optical Isolation: Ensures electrical isolation between input control signals and output load circuits, protecting sensitive electronics from voltage transients and noise.
- Wide Load Compatibility: Capable of switching both DC and AC voltages, making it versatile for mixed-signal environments.
- Compact Form Factor: Standardized G5 module footprint for easy integration into Grayhill backplanes or compatible I/O racks.
- High Reliability: Mechanical relay design rated for long operational life and consistent switching performance.
- LED Status Indicator (typical for G5 modules): Provides visual feedback of output state for quick diagnostics.
- Plug-in Module Design: Facilitates quick installation, replacement, and maintenance without rewiring.
- Low Control Current: Compatible with TTL and CMOS logic levels, minimizing power draw from control circuitry.
- Industrial-Grade Construction: Designed for robust operation in demanding environments, with high dielectric strength and resistance to electrical interference.
- Digital Output Module: Designed for digital control systems, PLCs, and microcontroller-based automation platforms.
- Optical Isolation: Ensures electrical isolation between input control signals and output load circuits, protecting sensitive electronics from voltage transients and noise.
- Wide Load Compatibility: Capable of switching both DC and AC voltages, making it versatile for mixed-signal environments.
- Compact Form Factor: Standardized G5 module footprint for easy integration into Grayhill backplanes or compatible I/O racks.
- High Reliability: Mechanical relay design rated for long operational life and consistent switching performance.
- LED Status Indicator (typical for G5 modules): Provides visual feedback of output state for quick diagnostics.
- Plug-in Module Design: Facilitates quick installation, replacement, and maintenance without rewiring.
- Low Control Current: Compatible with TTL and CMOS logic levels, minimizing power draw from control circuitry.
- Industrial-Grade Construction: Designed for robust operation in demanding environments, with high dielectric strength and resistance to electrical interference.
1. Product Overview
Product Name: Grayhill G5 Digital DC/AC Output, Dry Contact Relay
Model Number: 70G-ODC5R
Series: G5 Series
Article Number: 70G-ODC5R
Manufacturer: Grayhill, Inc.
The Grayhill 70G-ODC5R is a digital output relay module designed for interfacing low-voltage control systems with higher-voltage AC or DC loads. As part of Grayhill’s G5 Series of digital I/O modules, this unit provides a dry contact relay output, enabling galvanic isolation between control logic and load circuits. The module is engineered for industrial automation, process control, and embedded system applications where reliable switching, electrical isolation, and compact modular design are essential.
2. Key Features
- Dry Contact Relay Output: Provides a mechanical relay interface with isolated contacts, suitable for switching both AC and DC loads.
- Digital Output Module: Designed for digital control systems, PLCs, and microcontroller-based automation platforms.
- Optical Isolation: Ensures electrical isolation between input control signals and output load circuits, protecting sensitive electronics from voltage transients and noise.
- Wide Load Compatibility: Capable of switching both DC and AC voltages, making it versatile for mixed-signal environments.
- Compact Form Factor: Standardized G5 module footprint for easy integration into Grayhill backplanes or compatible I/O racks.
- High Reliability: Mechanical relay design rated for long operational life and consistent switching performance.
- LED Status Indicator (typical for G5 modules): Provides visual feedback of output state for quick diagnostics.
- Plug-in Module Design: Facilitates quick installation, replacement, and maintenance without rewiring.
- Low Control Current: Compatible with TTL and CMOS logic levels, minimizing power draw from control circuitry.
- Industrial-Grade Construction: Designed for robust operation in demanding environments, with high dielectric strength and resistance to electrical interference.
3. Technical Specifications
*(Typical values for Grayhill G5 Series dry contact relay modules; actual specifications may vary slightly by production batch.)*
- Model: 70G-ODC5R
- Output Type: Dry contact (mechanical relay)
- Control Voltage: 5 VDC nominal (logic input)
- Input Current: Approximately 15–20 mA at 5 VDC
- Output Voltage Range: 0–60 VDC or 0–120 VAC (depending on load type)
- Output Current Rating: Up to 2 A resistive load (DC or AC)
- Contact Type: SPST (Single Pole, Single Throw), normally open
- Contact Resistance: < 0.1 Ω (initial)
- Dielectric Strength: 1500 Vrms minimum between input and output
- Isolation Resistance: > 10^9 Ω at 500 VDC
- Turn-On Time: Typically 5–10 ms
- Turn-Off Time: Typically 5–10 ms
- Operating Temperature Range: –30°C to +70°C
- Storage Temperature Range: –40°C to +85°C
- Humidity: 5–95% non-condensing
- Dimensions: Approx. 25.4 mm (1.0 in) height × 25.4 mm (1.0 in) width × 12.7 mm (0.5 in) depth (standard G5 module size)
- Weight: Approximately 20–25 g per module
- Mounting Style: Plug-in module for G5 backplane or socket
- Material: Molded thermoplastic housing, UL-rated for flammability resistance
- Connector Type: 5-pin SIP (Single Inline Package) format
4. Functionality
The Grayhill 70G-ODC5R functions as a digital output interface that converts low-level control signals into isolated relay outputs. When a 5 VDC control signal is applied to the input terminals, the internal optocoupler activates the relay coil, closing the dry contact and allowing current to flow through the output circuit. When the control signal is removed, the relay opens, interrupting the load circuit.
Use Cases and Applications:
- Industrial automation systems requiring isolated switching of AC or DC loads
- PLC output expansion modules
- Embedded control systems and microcontroller-based automation
- Signal routing and load control in test and measurement equipment
- Building automation and HVAC control systems
- Process control panels and distributed I/O systems
- Machine control and safety interlock circuits
Compatibility:
The 70G-ODC5R is compatible with Grayhill G5 Series sockets, backplanes, and I/O racks. It can interface with TTL, CMOS, or microprocessor logic outputs and is suitable for integration with most industrial control systems supporting 5 VDC logic levels.
5. Components & Accessories
Included Items:
- One (1) Grayhill 70G-ODC5R relay module
- Integrated LED status indicator (if applicable)
- Protective molded housing
Optional Accessories:
- Grayhill G5 Series Sockets: For mounting and wiring the module into control panels or backplanes.
- DIN Rail Mounting Adapters: For modular installation in industrial enclosures.
- Backplane Assemblies: Multi-channel I/O racks for grouping multiple G5 modules.
- Protective Covers and Labels: For identification and environmental protection.
Connectors:
- 5-pin SIP interface compatible with standard G5 sockets
- Pin 1: Control input (+5 VDC)
- Pin 2: Control common (ground)
- Pin 3: Output common
- Pin 4: Normally open contact
- Pin 5: Not used or auxiliary (depending on configuration)
6. Installation & Setup
Requirements:
- Control voltage source: 5 VDC ±10%
- Load voltage: Up to 60 VDC or 120 VAC (depending on application)
- Load current: ≤ 2 A resistive
Mounting Options:
- Plug directly into a Grayhill G5 socket or compatible backplane.
- Mount socket assemblies on DIN rails or panel surfaces.
- Ensure adequate spacing for ventilation and heat dissipation.
Configuration Steps:
1. Verify control and load voltage ratings before installation.
2. Insert the module into the corresponding socket, ensuring correct pin alignment.
3. Connect control signal lines to the input terminals.
4. Connect load wiring to the output terminals (normally open contact and common).
5. Apply control voltage and verify LED indicator operation (if equipped).
6. Test switching functionality under load conditions.
Safety Considerations:
- Always disconnect power before inserting or removing modules.
- Observe proper polarity for control inputs.
- Ensure load current does not exceed rated capacity.
- Use appropriate fusing or circuit protection for connected loads.
7. Performance & Capabilities
The 70G-ODC5R provides reliable switching performance for both AC and DC circuits. Its mechanical relay output ensures true galvanic isolation, making it suitable for applications where solid-state relays may not provide sufficient isolation or where dry contact switching is required.
Speed:
- Switching times are typically in the 5–10 ms range, suitable for general-purpose control applications.
Capacity:
- Rated for up to 2 A resistive load, supporting small motors, solenoids, lamps, and control relays.
Efficiency:
- Low input current minimizes control circuit power consumption.
- Mechanical relay design ensures negligible leakage current when open, ideal for signal-level switching.
Limitations:
- Not recommended for high-speed switching or PWM control due to mechanical relay response time.
- Contact wear may occur over extended use with inductive loads; use suppression diodes or snubbers as needed.
- Limited to moderate current loads; for higher currents, external relays or contactors should be used.
8. Standards & Compliance
The Grayhill 70G-ODC5R and G5 Series modules are designed and manufactured to meet or exceed relevant industrial and safety standards.
Certifications and Compliance:
- UL Recognized Component: Meets UL safety requirements for industrial control equipment.
- CSA Certified: Complies with Canadian Standards Association requirements for electrical components.
- CE Marked: Conforms to European Union directives for electromagnetic compatibility (EMC) and low-voltage safety.
- RoHS Compliant: Free from hazardous substances such as lead, mercury, and cadmium.
- ISO 9001 Manufacturing: Produced in facilities certified for quality management systems.
Industry Standards:
- Designed in accordance with IEC 60947 (Low-voltage switchgear and controlgear).
- Meets ANSI/ISA standards for industrial automation components.
- Compatible with standard 5 VDC logic control systems per TTL/CMOS specifications.
9. Additional Information
Warranty:
Grayhill provides a standard limited warranty (typically one year from date of purchase) covering defects in materials and workmanship under normal operating conditions.
Support:
Technical support, datasheets, and application notes are available through Grayhill’s official website and authorized distributors. Engineering assistance is provided for integration, troubleshooting, and product selection.
Maintenance:
- Periodic inspection recommended for contact wear and socket integrity.
- Keep module free from dust and contaminants.
- Replace module if switching performance degrades or if mechanical wear is observed.
Updates and Revisions:
The 70G-ODC5R is part of Grayhill’s ongoing G5 Series product line. Firmware updates are not applicable (mechanical relay device), but product revisions may include improved materials or updated certifications. Always refer to the latest datasheet for current specifications.
Environmental Considerations:
- Designed for operation in industrial environments with moderate temperature and humidity.
- Dispose of in accordance with local electronic waste regulations.
Summary
The Grayhill 70G-ODC5R G5 Digital DC/AC Output Dry Contact Relay is a robust, versatile, and reliable output module engineered for industrial and embedded control applications. Its dry contact relay output provides true electrical isolation, enabling safe and efficient switching of AC or DC loads from low-voltage digital control signals. With its compact G5 form factor, plug-in design, and compatibility with Grayhill’s modular I/O systems, the 70G-ODC5R offers a flexible solution for designers seeking dependable digital output interfacing.
Built to meet stringent industrial standards and backed by Grayhill’s reputation for quality, the 70G-ODC5R delivers consistent performance, long service life, and ease of integration across a wide range of automation, instrumentation, and control environments.
Product Name: Grayhill G5 Digital DC/AC Output, Dry Contact Relay
Model Number: 70G-ODC5R
Series: G5 Series
Article Number: 70G-ODC5R
Manufacturer: Grayhill, Inc.
The Grayhill 70G-ODC5R is a digital output relay module designed for interfacing low-voltage control systems with higher-voltage AC or DC loads. As part of Grayhill’s G5 Series of digital I/O modules, this unit provides a dry contact relay output, enabling galvanic isolation between control logic and load circuits. The module is engineered for industrial automation, process control, and embedded system applications where reliable switching, electrical isolation, and compact modular design are essential.
2. Key Features
- Dry Contact Relay Output: Provides a mechanical relay interface with isolated contacts, suitable for switching both AC and DC loads.
- Digital Output Module: Designed for digital control systems, PLCs, and microcontroller-based automation platforms.
- Optical Isolation: Ensures electrical isolation between input control signals and output load circuits, protecting sensitive electronics from voltage transients and noise.
- Wide Load Compatibility: Capable of switching both DC and AC voltages, making it versatile for mixed-signal environments.
- Compact Form Factor: Standardized G5 module footprint for easy integration into Grayhill backplanes or compatible I/O racks.
- High Reliability: Mechanical relay design rated for long operational life and consistent switching performance.
- LED Status Indicator (typical for G5 modules): Provides visual feedback of output state for quick diagnostics.
- Plug-in Module Design: Facilitates quick installation, replacement, and maintenance without rewiring.
- Low Control Current: Compatible with TTL and CMOS logic levels, minimizing power draw from control circuitry.
- Industrial-Grade Construction: Designed for robust operation in demanding environments, with high dielectric strength and resistance to electrical interference.
3. Technical Specifications
*(Typical values for Grayhill G5 Series dry contact relay modules; actual specifications may vary slightly by production batch.)*
- Model: 70G-ODC5R
- Output Type: Dry contact (mechanical relay)
- Control Voltage: 5 VDC nominal (logic input)
- Input Current: Approximately 15–20 mA at 5 VDC
- Output Voltage Range: 0–60 VDC or 0–120 VAC (depending on load type)
- Output Current Rating: Up to 2 A resistive load (DC or AC)
- Contact Type: SPST (Single Pole, Single Throw), normally open
- Contact Resistance: < 0.1 Ω (initial)
- Dielectric Strength: 1500 Vrms minimum between input and output
- Isolation Resistance: > 10^9 Ω at 500 VDC
- Turn-On Time: Typically 5–10 ms
- Turn-Off Time: Typically 5–10 ms
- Operating Temperature Range: –30°C to +70°C
- Storage Temperature Range: –40°C to +85°C
- Humidity: 5–95% non-condensing
- Dimensions: Approx. 25.4 mm (1.0 in) height × 25.4 mm (1.0 in) width × 12.7 mm (0.5 in) depth (standard G5 module size)
- Weight: Approximately 20–25 g per module
- Mounting Style: Plug-in module for G5 backplane or socket
- Material: Molded thermoplastic housing, UL-rated for flammability resistance
- Connector Type: 5-pin SIP (Single Inline Package) format
4. Functionality
The Grayhill 70G-ODC5R functions as a digital output interface that converts low-level control signals into isolated relay outputs. When a 5 VDC control signal is applied to the input terminals, the internal optocoupler activates the relay coil, closing the dry contact and allowing current to flow through the output circuit. When the control signal is removed, the relay opens, interrupting the load circuit.
Use Cases and Applications:
- Industrial automation systems requiring isolated switching of AC or DC loads
- PLC output expansion modules
- Embedded control systems and microcontroller-based automation
- Signal routing and load control in test and measurement equipment
- Building automation and HVAC control systems
- Process control panels and distributed I/O systems
- Machine control and safety interlock circuits
Compatibility:
The 70G-ODC5R is compatible with Grayhill G5 Series sockets, backplanes, and I/O racks. It can interface with TTL, CMOS, or microprocessor logic outputs and is suitable for integration with most industrial control systems supporting 5 VDC logic levels.
5. Components & Accessories
Included Items:
- One (1) Grayhill 70G-ODC5R relay module
- Integrated LED status indicator (if applicable)
- Protective molded housing
Optional Accessories:
- Grayhill G5 Series Sockets: For mounting and wiring the module into control panels or backplanes.
- DIN Rail Mounting Adapters: For modular installation in industrial enclosures.
- Backplane Assemblies: Multi-channel I/O racks for grouping multiple G5 modules.
- Protective Covers and Labels: For identification and environmental protection.
Connectors:
- 5-pin SIP interface compatible with standard G5 sockets
- Pin 1: Control input (+5 VDC)
- Pin 2: Control common (ground)
- Pin 3: Output common
- Pin 4: Normally open contact
- Pin 5: Not used or auxiliary (depending on configuration)
6. Installation & Setup
Requirements:
- Control voltage source: 5 VDC ±10%
- Load voltage: Up to 60 VDC or 120 VAC (depending on application)
- Load current: ≤ 2 A resistive
Mounting Options:
- Plug directly into a Grayhill G5 socket or compatible backplane.
- Mount socket assemblies on DIN rails or panel surfaces.
- Ensure adequate spacing for ventilation and heat dissipation.
Configuration Steps:
1. Verify control and load voltage ratings before installation.
2. Insert the module into the corresponding socket, ensuring correct pin alignment.
3. Connect control signal lines to the input terminals.
4. Connect load wiring to the output terminals (normally open contact and common).
5. Apply control voltage and verify LED indicator operation (if equipped).
6. Test switching functionality under load conditions.
Safety Considerations:
- Always disconnect power before inserting or removing modules.
- Observe proper polarity for control inputs.
- Ensure load current does not exceed rated capacity.
- Use appropriate fusing or circuit protection for connected loads.
7. Performance & Capabilities
The 70G-ODC5R provides reliable switching performance for both AC and DC circuits. Its mechanical relay output ensures true galvanic isolation, making it suitable for applications where solid-state relays may not provide sufficient isolation or where dry contact switching is required.
Speed:
- Switching times are typically in the 5–10 ms range, suitable for general-purpose control applications.
Capacity:
- Rated for up to 2 A resistive load, supporting small motors, solenoids, lamps, and control relays.
Efficiency:
- Low input current minimizes control circuit power consumption.
- Mechanical relay design ensures negligible leakage current when open, ideal for signal-level switching.
Limitations:
- Not recommended for high-speed switching or PWM control due to mechanical relay response time.
- Contact wear may occur over extended use with inductive loads; use suppression diodes or snubbers as needed.
- Limited to moderate current loads; for higher currents, external relays or contactors should be used.
8. Standards & Compliance
The Grayhill 70G-ODC5R and G5 Series modules are designed and manufactured to meet or exceed relevant industrial and safety standards.
Certifications and Compliance:
- UL Recognized Component: Meets UL safety requirements for industrial control equipment.
- CSA Certified: Complies with Canadian Standards Association requirements for electrical components.
- CE Marked: Conforms to European Union directives for electromagnetic compatibility (EMC) and low-voltage safety.
- RoHS Compliant: Free from hazardous substances such as lead, mercury, and cadmium.
- ISO 9001 Manufacturing: Produced in facilities certified for quality management systems.
Industry Standards:
- Designed in accordance with IEC 60947 (Low-voltage switchgear and controlgear).
- Meets ANSI/ISA standards for industrial automation components.
- Compatible with standard 5 VDC logic control systems per TTL/CMOS specifications.
9. Additional Information
Warranty:
Grayhill provides a standard limited warranty (typically one year from date of purchase) covering defects in materials and workmanship under normal operating conditions.
Support:
Technical support, datasheets, and application notes are available through Grayhill’s official website and authorized distributors. Engineering assistance is provided for integration, troubleshooting, and product selection.
Maintenance:
- Periodic inspection recommended for contact wear and socket integrity.
- Keep module free from dust and contaminants.
- Replace module if switching performance degrades or if mechanical wear is observed.
Updates and Revisions:
The 70G-ODC5R is part of Grayhill’s ongoing G5 Series product line. Firmware updates are not applicable (mechanical relay device), but product revisions may include improved materials or updated certifications. Always refer to the latest datasheet for current specifications.
Environmental Considerations:
- Designed for operation in industrial environments with moderate temperature and humidity.
- Dispose of in accordance with local electronic waste regulations.
Summary
The Grayhill 70G-ODC5R G5 Digital DC/AC Output Dry Contact Relay is a robust, versatile, and reliable output module engineered for industrial and embedded control applications. Its dry contact relay output provides true electrical isolation, enabling safe and efficient switching of AC or DC loads from low-voltage digital control signals. With its compact G5 form factor, plug-in design, and compatibility with Grayhill’s modular I/O systems, the 70G-ODC5R offers a flexible solution for designers seeking dependable digital output interfacing.
Built to meet stringent industrial standards and backed by Grayhill’s reputation for quality, the 70G-ODC5R delivers consistent performance, long service life, and ease of integration across a wide range of automation, instrumentation, and control environments.
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