

The Allen-Bradley 1769-ASCII module is a dedicated serial communication interface engineered for CompactLogix controllers, allowing direct ASCII string handling without additional programming overhead. Designed for factory automation environments, it bridges PLC logic with serial peripherals such as RFID readers, weigh indicators, and label printers. The module supports standard baud rates up to 115.2 kbps and features configurable parity, stop bits, and data length. Its compact form factor fits seamlessly into 1769 I/O banks, and it includes diagnostic LEDs for transmit/receive status. Below is the detailed technical specification table for the 1769-ASCII.
| Parameter | Specification |
|---|---|
| Product Type | Serial Communication Module (ASCII Interface) |
| Compatible Controllers | Allen-Bradley CompactLogix 1769 Series (e.g., 1769-L30ER, 1769-L36ERM) |
| Communication Ports | 1 x RS-232/422/485 (DB9 male connector) |
| Supported Protocols | ASCII, Modbus RTU (via configuration), custom serial |
| Baud Rate Range | 300 bps to 115.2 kbps (software selectable) |
| Data Format | 7 or 8 data bits; odd, even, or no parity; 1 or 2 stop bits |
| Buffer Size | 512 bytes transmit, 512 bytes receive (FIFO) |
| Isolation | 500V DC between port and backplane |
| Power Consumption | 5V DC Standard Models 180 mA (typical) from backplane |
| Operating Temperature | -20°C to +60°C (-4°F to +140°F) |
| Storage Temperature | -40°C to +85°C (-40°F to +185°F) |
| Relative Humidity | 5% to 95% non-condensing |
| Vibration Resistance | 5 g Standard Models 10-500 Hz per IEC 60068-2-6 |
| Shock Resistance | 30 g peak, 11 ms duration per IEC 60068-2-27 |
| LED Indicators | Power, Module Status, Transmit (TX), Receive (RX) |
| Configuration Software | RSLogix 5000 / Studio 5000 (v20 or later) |
| Dimensions (H x W x D) | 118 mm x 35 mm x 87 mm (4.65 in x 1.38 in x 3.43 in) |
| Weight | Approx. 0.15 kg (0.33 lb) |
| Approvals | CE, UL, cUL, ATEX (Zone 2), IECEx |
| Wiring Termination | Removable screw terminal block (included) for RS-422/485 |

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