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- 1747-L30D
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- 17.8 × 15.2 × 15.2 cm
- 2.1kg
- Xiamen, China
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Allen Bradley 1747-L30D Detailed Product Introduction and Technical Specifications
Product Overview
The Allen Bradley 1747-L30D is a fixed hardware PLC controller belonging to the SLC 500 series. It is designed for small to medium industrial automation systems that require integrated control logic, built-in I/O, and stable real-time processing performance.
This controller combines a processor, power supply interface, digital inputs, and relay/triac outputs into a single compact unit, reducing the need for external I/O modules and simplifying cabinet wiring.
It is commonly used in industrial machines, production lines, packaging equipment, conveyor systems, and general-purpose automation control applications where reliability and simplicity are required.
The 1747-L30D is part of a mature and widely deployed PLC platform, often found in legacy systems that continue to operate in industrial environments worldwide.
Brand Information
| Item | Details |
|---|---|
| Brand | Allen Bradley |
| Product Model | 1747-L30D |
| Product Type | Fixed Hardware PLC Controller |
| Product Family | SLC 500 Series |
| Series | SLC 500 Series |
| Main Function | Integrated PLC Control Unit |
| Communication | DH-485 (Slave Mode) |
| Installation Type | Fixed Base Controller |
Product Series Introduction
SLC 500 Series Overview
The SLC 500 series is a modular and fixed PLC platform designed for industrial automation and machine control applications.
It supports scalable architectures ranging from compact fixed controllers to modular rack-based systems with expandable I/O and communication modules.
The series is widely known for its durability, stable operation, and long lifecycle in industrial environments.
The 1747-L30D belongs to the fixed controller category, where CPU, I/O, and power circuitry are integrated into one unit for simplified control applications.
Detailed Technical Specifications of 1747-L30D
| Parameter | Specification |
|---|---|
| Model | 1747-L30D |
| Product Type | Fixed PLC Controller |
| Series | SLC 500 |
| Program Memory | 1K Instructions |
| Input Configuration | 18 × 24V DC Sink Inputs |
| Output Configuration | 12 × AC Triac Outputs |
| Output Load Capacity | 0.5A per output channel |
| Power Supply | 120/240V AC |
| Frequency | 47–63 Hz |
| Backplane User Power | 24V DC, 200 mA |
| Communication Port | DH-485 |
| High-Speed Counter | Supported |
| Scan Time | ~8 ms / 1K instructions |
| Input Voltage Range | 10–30V DC |
| Isolation | 150V AC optical isolation |
| Memory Type | Capacitor-backed RAM |
| Backup Options | EEPROM / UVPROM |
| Cable Type | Belden 9463 |
| Connector Type | 6-Pin Phoenix Connector |
| LED Indicators | Power / Run / Fault / I/O / Battery |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity Range | 5%–95% non-condensing |
| Shock Resistance | Industrial grade |
| Dimensions | 17.8 × 15.2 × 15.2 cm |
| Weight (kg) | 2.10 kg |
Product Features
1. Integrated PLC Architecture
The 1747-L30D integrates CPU, power supply, and I/O into a single compact structure.
This reduces system complexity and eliminates the need for external input/output modules in small automation systems.
2. Built-in Digital Input and Output Capability
The controller includes 18 DC digital inputs and 12 AC triac outputs.
This allows direct connection to sensors, switches, relays, and actuators without additional expansion hardware.
3. Stable Industrial Control Performance
The processor delivers consistent scan cycle performance suitable for deterministic machine control tasks.
It ensures stable execution of control logic in real-time industrial environments.
4. DH-485 Communication Support
The built-in DH-485 port enables communication with programming terminals and other PLC systems.
This supports program upload/download, monitoring, and basic network communication.
5. High-Speed Counting Function
The controller supports high-speed counter input for applications requiring pulse counting, speed detection, or position tracking.
6. Industrial Durability
The hardware is designed to operate in harsh industrial environments with electrical noise, vibration, and temperature fluctuations.
It provides long-term stable operation in factory automation systems.
Product Applications
Manufacturing Equipment
Used in general-purpose manufacturing machines such as presses, cutters, and assembly equipment.
Packaging Systems
Controls sealing, filling, labeling, and packaging line automation processes.
Conveyor Systems
Manages motor control, product counting, and sequencing operations in conveyor lines.
Process Automation
Used in small-scale process control applications requiring basic analog and digital logic control.
Legacy Industrial Systems
Widely used in older installations where SLC 500 architecture remains in operation.
Product Advantages
| Advantage | Description |
|---|---|
| Integrated Design | CPU + I/O + power in one unit |
| Reduced Wiring Complexity | No need for external I/O racks |
| Stable Operation | Reliable industrial-grade control |
| Built-in I/O | Direct sensor/actuator connection |
| Cost Efficiency | Suitable for small automation systems |
| Easy Maintenance | Simple diagnostic LED indicators |
| Legacy Compatibility | Works within SLC 500 ecosystem |
| Rugged Construction | Designed for harsh environments |
Recommended Models from the Same Series or Related Series
| Model | Product Type | Main Function | Application | Dimensions | Weight (kg) |
|---|---|---|---|---|---|
| 1747-L20C | Fixed PLC Controller | Compact control unit | Small machines | 17.8 × 15.2 × 15.2 cm | 1.36 kg |
| 1747-L30D | Fixed PLC Controller | Medium I/O control | Production systems | 17.8 × 15.2 × 15.2 cm | 2.10 kg |
| 1747-L40A | Modular CPU | Expanded control system | Industrial automation | 18 × 15 × 16 cm | 1.50 kg |
| 1747-L541 | Advanced Processor | High-performance control | Process industries | 20 × 16 × 17 cm | 1.80 kg |
| 1747-L553 | High-end CPU | Network-capable controller | Complex systems | 21 × 17 × 18 cm | 2.10 kg |
Recommended Popular Models from Same Brand
| Model | Product Category | Main Features | Application Area | Dimensions | Weight (kg) |
|---|---|---|---|---|---|
| 1756-EN2TR | Ethernet Module | Dual Ethernet/IP ports | Industrial networking | 14 × 11 × 8 cm | 0.45 kg |
| 1769-L33ER | PLC Controller | Integrated Ethernet/IP | Machine automation | 18 × 12 × 9 cm | 0.92 kg |
| 1756-IB16 | Digital Input Module | 16 input channels | Factory systems | 15 × 11 × 6 cm | 0.30 kg |
| 1769-IF8 | Analog Input Module | 8-channel analog input | Process control | 12 × 9 × 5 cm | 0.35 kg |
| 1783-US8T | Ethernet Switch | Managed industrial switch | Network systems | 16 × 12 × 5 cm | 0.80 kg |
System Role in Industrial Automation
The 1747-L30D functions as a standalone control unit capable of executing logic, processing inputs, and driving outputs directly.
It reduces dependency on external modules and simplifies system design in compact automation setups.
Its DH-485 communication capability allows basic integration into larger control networks and programming environments.
Installation and Maintenance
The controller is installed as a fixed unit in control cabinets.
Wiring is simplified due to integrated I/O terminals.
LED indicators provide clear system diagnostics for power, run status, fault detection, and I/O activity.
Maintenance requirements are minimal due to its integrated structure and stable hardware design.
Industrial Reliability
The 1747-L30D is designed for continuous industrial operation and has been widely deployed in long-life automation systems.
Its robust construction ensures stable performance under electrical noise, vibration, and temperature variation conditions.
It remains a dependable solution in legacy SLC 500 installations still operating in production environments.
Summary
The Allen Bradley 1747-L30D is a fixed SLC 500 PLC controller designed for compact industrial automation systems.
It integrates CPU and I/O into one unit, providing stable, reliable, and cost-effective control functionality.
Its simplicity, durability, and strong legacy compatibility make it a widely used controller in industrial automation systems worldwide.