Introduction
The Allen Bradley 1771-ASB/E is a serial communication module for the PLC-5 family, designed to facilitate data exchange between PLC-5 processors and external devices via serial interfaces. From a system integration standpoint, this module allows engineers to connect PLC-5 systems to remote I/O, operator panels, or third-party instruments. Its design ensures deterministic, reliable communication while maintaining compatibility with legacy industrial networks, making it indispensable for multi-rack or distributed PLC architectures.
Technical Specifications
| Parameter | Description |
|---|---|
| Modèle Number | 1771-ASB/E |
| Module Type | Serial Communication Module |
| Compatible Platform | Automate Allen Bradley-5 |
| Communication Interface | RS-232 / RS-422 serial communication |
| Baud Rate | Configurable 300–38,400 bps |
| Isolation | Optical isolation between module electronics and backplane |
| Number sur Channels | 1 serial port |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | –40°C to +85°C |
| Dimensions (H × W × D) | 140 mm × 35 mm × 160 mm |
| Poids | ≈ 0.30 kg |
| Mounting | Standard PLC-5 1771 chassis slot |
Applications
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Connecting PLC-5 processors to remote devices using serial communication
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Integration with legacy instrumentation, HMIs, and third-party automation equipment
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Multi-rack PLC-5 systems requiring inter-rack serial communication
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Process control systems with distributed I/O requiring remote data acquisition
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Systems where Ethernet or modern fieldbus networks are unavailable
Advantages
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Deterministic serial communication: Reliable timing ensures predictable system performance
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Single-port simplicity: Easy configuration and minimal footprint for serial connectivity
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Electrical isolation: Protects PLC backplane and I/O modules from network surges
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Flexible integration: Compatible with RS-232 and RS-422 devices
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Compact design: Efficient use sur chassis space while maintaining robust performance
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