Compact Form-C Relay Output for Flexible Industrial Switching Applications
The Allen Bradley 1734-OX2 Relay Output Module is a POINT I/O discrete output module designed for industrial automation systems requiring compact, reliable, and electrically isolated relay switching. It is engineered for distributed control architectures where both AC and DC loads must be switched with high flexibility and stable performance.
Unlike transistor-based output modules, the 1734-OX2 uses electromechanical Form C relay contacts (NO/NC), making it suitable for a wide range of field devices such as contactors, alarms, solenoids, and auxiliary control circuits. Its compact POINT I/O design allows easy integration into machine-level and panel-mounted distributed I/O systems.
This module is widely used in environments where electrical isolation, mixed-voltage switching, and signal versatility are critical design requirements.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Allen Bradley |
| Product Family | POINT I/O |
| Model Number | 1734-OX2 |
| Module Type | Relay Output Module |
| Output Channels | 2 Points |
| Contact Type | Form C (NO / NC) |
| Relay Type | Electromechanical |
| Output Voltage Range | 5–240V AC / 5–125V DC |
| Output Current Rating | Up to 2 A per channel |
| Load Type | AC / DC Resistive & Inductive |
| Isolation | Channel-to-channel isolated contacts |
| Power Supply | 24V DC system power |
| Backplane Current | Approx. 100 mA @ 5V DC |
| Power Dissipation | ~0.5 W |
| Mounting | DIN Rail (via POINT I/O base) |
| Compatible Bases | 1734-TB / 1734-TBS / 1734-TOP series |
| Operating Temperature | -20°C to 55°C |
| Storage Temperature | -40°C to 85°C |
| Dimensions | Approx. 56 mm × 12 mm × 75.5 mm |
| Weight | Approx. 0.05 kg |
Applications
The 1734-OX2 is commonly used in industrial automation systems that require true dry-contact switching flexibility across different voltage domains.
Typical applications include:
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Industrial motor starter control circuits
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Alarm and safety signal interfacing
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Solenoid valve switching
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Conveyor system control logic
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HVAC and building automation interfaces
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OEM machine control panels
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Relay isolation between PLC and field devices
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Mixed AC/DC load switching environments
Its Form C relay structure makes it especially useful when both normally open and normally closed logic behavior is required in a compact footprint.
Advantages
True Electrical Isolation Switching
The electromechanical relay design provides physical isolation between control logic and field wiring, improving signal separation and system robustness.
Dual Contact Flexibility (NO/NC)
Form C output configuration allows both normally open and normally closed switching without additional external relay logic.
Broad Voltage Compatibility
Supports both AC and DC loads, making it suitable for mixed industrial environments without redesigning output architecture.
Compact Distributed I/O Design
As part of the POINT I/O family, it reduces cabinet wiring complexity and enables scalable remote I/O deployment.
Reliable Industrial Integration
Seamlessly integrates with Allen Bradley controllers and EtherNet/IP architectures for consistent automation performance.
Technical FAQs
1. What is the main function of the 1734-OX2?
It provides relay-based digital output switching with Form C contacts for industrial control systems.
2. How many outputs does it have?
It has 2 relay output channels.
3. Are the outputs normally open or normally closed?
Each channel is Form C, meaning both NO and NC contacts are available.
4. Can it switch AC and DC loads?
Yes, it supports both AC and DC loads depending on application requirements.
5. What is the maximum current per output?
Each relay channel supports up to 2 A load current.
6. Is there electrical isolation between channels?
Yes, each relay contact is individually isolated for improved signal separation.
7. Does it require a separate power supply?
It uses 24V DC system power through the POINT I/O backplane.
8. What type of loads is it best suited for?
It is ideal for contactors, alarms, solenoids, and auxiliary control devices.
9. What mounting system is used?
It mounts via DIN rail using a POINT I/O terminal base.
10. Is it suitable for compact control panels?
Yes, its slim modular design is optimized for high-density industrial cabinet layouts.
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