The Allen Bradley 1771-NOC is a PLC-5 series communication module designed for the 1771 I/O platform. It provides serial communication capability between PLC-5 systems and external industrial devices such as HMIs, barcode readers, printers, weighing systems, and third-party automation equipment.
This module is commonly used in industrial environments where reliable serial data exchange and device integration are required within legacy PLC-5 architectures.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Allen Bradley (Rockwell Automation) |
| Catalog Number | 1771-NOC |
| Module Type | Serial Communication Module |
| System Family | PLC-5 / 1771 I/O |
| Communication Ports | 2 serial communication ports |
| Supported Protocols | ASCII / serial data communication |
| Interface Type | RS-232 / RS-422 / RS-485 compatible |
| Data Transmission Mode | Full duplex / half duplex |
| Baud Rate | Configurable industrial serial speeds |
| Data Handling | Message-based serial communication |
| Backplane Current Draw | ~1.2 A @ 5 V DC |
| Power Dissipation | Industrial low-power operation |
| Isolation | Electrical isolation for communication protection |
| Mounting Type | 1771 chassis slot |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Weight | ~0.5 kg |
| Dimensions (L×W×H) | 203 mm × 76 mm × 127 mm |
System Role Overview
The 1771-NOC module is designed to provide industrial serial communication connectivity for PLC-5 control systems.
Core functions include:
- Serial communication with external devices
- ASCII data transmission and reception
- Interface integration for industrial equipment
- Data exchange between PLC systems and peripherals
- Support for third-party device connectivity
It enables PLC-5 systems to communicate with a wide range of industrial serial devices without requiring additional external converters.
Recommended Related Modules
| Model | Function |
|---|---|
| 1771-DMC | Data Highway communication module |
| 1771-ASB | Remote I/O adapter |
| 1771-IFE | Analog input module |
| 1771-IBD | DC input module |
| 1771-OBD | Digital output module |
| 1771-P7 | Chassis power supply |
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| Model | Function |
|---|---|
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