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The Allen Bradley 1734-OB4E is a 4-channel electronically protected digital DC output module designed for distributed industrial control systems. It is built to provide reliable switching of 24V DC loads while adding an extra layer of protection through integrated electronic safeguards.
This module delivers four sourcing outputs, allowing it to control a range of field devices such as solenoid valves, relays, pilot lamps, and small actuators. The “E” designation indicates enhanced protection, meaning each channel is protected against overload, short circuit, and thermal conditions.
Its compact form factor and modular design make it well suited for installation in modern control cabinets where space optimization and reliability are essential.
The POINT I/O platform enables distributed automation by allowing I/O modules to be installed closer to field devices, reducing wiring and improving system performance.
| Parameter | Specification |
|---|---|
| Model | 1734-OB4E |
| Output Type | Digital DC Sourcing Output |
| Channels | 4 |
| Rated Voltage | 24V DC |
| Voltage Range | 10–28.8V DC |
| Output Current | 2 A per channel (limited by protection) |
| Total Module Current | Approx. 4 A |
| Protection | Electronic (overload, short circuit, thermal) |
| Output Delay | Approx. 0.1 ms |
| Leakage Current | ≤ 0.5 mA |
| Isolation Voltage | 50V continuous |
| POINTBus Current | Approx. 75 mA @ 5V DC |
| Power Dissipation | Approx. 3–4 W |
| Mounting | DIN Rail |
| Operating Temperature | -20°C to +55°C |
| Storage Temperature | -40°C to +85°C |
| Protection Rating | IP20 |
| Dimensions | Approx. 75 × 12 × 56 mm |
| Weight | ≈ 0.04 kg ( 0.04 ) |
The 1734-OB4E is engineered to deliver both performance and protection in demanding industrial environments.
These features make it a strong choice for applications where both reliability and safety are required.
The module is widely used in industrial automation systems where DC outputs must be controlled safely and efficiently.
Typical application areas include:
It is particularly suitable for systems where output protection is critical, such as high-load or safety-sensitive environments.
Built-in electronic protection reduces the risk of module damage and improves system safety.
Supports relatively high current loads for demanding applications.
Slim housing allows installation in tight control cabinets.
Stable performance ensures consistent switching of DC loads.
Easily integrates into modular distributed I/O systems for scalable automation design.
| Model | Type | Channels | Voltage | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 1734-OB4 | Digital DC Output | 4 | 24V DC | 75 × 12 × 56 | 0.03 ( 0.03 ) |
| 1734-OB2EP | Protected DC Output | 2 | 24V DC | 56 × 12 × 75 | 0.05 ( 0.05 ) |
| 1734-OB8E | Protected DC Output | 8 | 24V DC | 75 × 12 × 56 | 0.10 ( 0.10 ) |
| 1734-OW4 | Relay Output | 4 | AC/DC | 75 × 12 × 56 | 0.12 ( 0.12 ) |
| 1734-IB4 | Digital DC Input | 4 | 24V DC | 75 × 12 × 56 | 0.10 ( 0.10 ) |
These modules can be combined within the same distributed I/O system to create flexible and efficient configurations.
| Model | Type | Channels | Voltage | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 1756-EN2T | Ethernet Communication | — | — | 145 × 140 × 35 | 0.45 ( 0.45 ) |
| 1756-IB16 | Digital Input | 16 | 24V DC | 145 × 140 × 35 | 0.40 ( 0.40 ) |
| 1756-OB16E | Digital Output | 16 | 24V DC | 145 × 140 × 35 | 0.42 ( 0.42 ) |
| 1769-IF4 | Analog Input | 4 | Analog | 118 × 87 × 35 | 0.30 ( 0.30 ) |
| 1769-OB16 | Digital Output | 16 | 24V DC | 118 × 87 × 35 | 0.30 ( 0.30 ) |