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Allen-Bradley 1769-ASCII Compact I/O Module

Product Description

The 1769-ASCII is a specialized communication module designed for Allen-Bradley CompactLogix and MicroLogix 1500 control systems. It provides serial ASCII communication capabilities, enabling direct interfacing with barcode scanners, printers, weigh scales, and other ASCII-compatible devices in industrial automation applications .

Key Features

Serial Communication
- Supports RS-232 and RS-485 interfaces (configurable via software) .
- Baud rates up to 115.2 kbps for high-speed data transfer .
Flexible Data Handling
- 2 independent ports (Port 0: RS-232; Port 1: RS-232/485 selectable) .
- Protocol emulation for devices like Allen-Bradley DF1, Modbus RTU, and custom ASCII strings .
Integration & Compatibility
- Works with CompactLogix L3x, Compact GuardLogix, and MicroLogix 1500 controllers .
- Hot-swappable (RIUP compliant) for reduced downtime .
Diagnostics & Configuration
- LED status indicators for port activity and errors .
- Configured via RSLogix 5000 or Connected Components Workbench (CCW) .
Compact Design
- Single-slot width (35mm) for space efficiency .
- DIN rail or panel mounting .

Technical Specifications

Parameter	Value
Model	1769-ASCII
Communication Ports	2 (Port 0: RS-232; Port 1: RS-232/485)
Baud Rate	300–115,200 bps
Data Bits	7 or 8
Stop Bits	1 or 2
Parity	None, Odd, Even
Protocols	DF1, Modbus RTU, Custom ASCII
Power Consumption	5V DC @ 220 mA, 24V DC @ 120 mA
Operating Temp.	0°C to +60°C
Dimensions	118 × 35 × 87 mm
Weight	0.23 kg

Applications

Barcode Scanning (logistics, inventory tracking) .
Weigh Scale Integration (food processing, packaging) .
Printer Control (labeling, reporting) .
Legacy Device Connectivity (RS-232/485 equipment) .

Installation & Usage Notes

Wiring
- Use shielded cables for RS-485 to reduce noise .
- Ensure proper grounding per NEC/CE standards .
Configuration
- Set baud rate, parity, and protocol to match the connected device .
- Test communication with ASCII strings (e.g., "*IDN?" for device queries) .
Troubleshooting
- Check LED indicators for port activity/errors .
- Verify termination resistors for RS-485 networks .