NI 183283-02 RS485 Null Modem Cable (2 Meters)

The NI 183283-02 is a 2-meter RS485 null modem cable engineered for direct peer-to-peer serial communication between devices implementing RS485 or RS422 interfaces. By reversing transmit (TX) and receive (RX) signals at the connector level, this cable eliminates the need for intermediate modem equipment while maintaining reliable data exchange over short distances. The dual DB-9 female connectors provide a standard interface for industrial automation, data acquisition, and control systems requiring straightforward device interconnection.

– Technical Specifications

• Cable Length: 2 meters
• Interface Type: RS485/RS422 Null Modem
• Connector Configuration: DB-9 Female to DB-9 Female (9-pin)
• Signal Architecture: Transmit (TX) and Receive (RX) signals reversed for direct device-to-device operation

– Key Features

• Null modem signal reversal eliminates external modem requirements
• Dual female DB-9 connectors support standard serial port interfaces
• 2-meter length accommodates mid-range equipment spacing in industrial environments
• RS485 and RS422 compatibility ensures broad integration with legacy and modern control equipment

– Typical Applications

• Industrial automation and control systems
• Data acquisition (DAQ) system interconnection
• GPIB device control via RS232 and RS485 serial ports
• Direct serial communication between incompatible endpoint configurations

– Compatibility & Integration

The cable supports both RS485 and RS422 serial protocols, making it suitable for DAQ applications and GPIB device control scenarios requiring serial-based connectivity. DB-9 female terminations on both ends ensure compatibility with standard serial port equipment without requiring gender adapters. Dimensional drawings are available in PDF and DXF formats to facilitate integration planning and cable routing verification.