Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 1203-GD1 |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Product Type | Remote I/O Communications Module |
| Product Line | 1203 Communication Modules |
| Input Voltage | 85 to 264 V AC, 1-Phase |
| Input Current | 35 mA maximum |
| Input Frequency | 45 to 63 Hz |
| SCANport Load | 60 mA DC |
| Communication Interface | SCANport / Allen-Bradley Remote I/O |
| Baud Rates | 57.6K, 115.2K, 230.4K |
| Rack Sizes | 1/4, 1/2, 3/4, Full |
| Operating Temperature | 0 to 50 °C |
| Storage Temperature | -40 to 85 °C |
| Relative Humidity | 0 to 95%, non-condensing |
| Dimensions (H × W × D) | 76 mm × 45 mm × 123 mm |
| Enclosure | NEMA Type 1 (IP30) |
| DIN Rail Standard | 35 × 7.5 mm |
Main Features and Advantages
SCANport to Remote I/O Protocol Conversion: The 1203-GD1 performs real-time translation between the SCANport peripheral protocol and Allen-Bradley‘s Remote I/O network protocol, enabling drives and other SCANport products to be controlled and monitored as standard RIO devices . This conversion allows existing PLC-5, SLC 500, and Logix5550 controllers to integrate drives without requiring specialized communication hardware or software beyond the RIO scanner already present in the control system.
Stand-Alone DIN Rail Mounting: Unlike rack-mounted communication cards, the 1203-GD1 mounts independently on a standard 35 mm DIN rail, requiring only an external power supply and cable connections to become operational . This stand-alone design simplifies installation in existing cabinets, allows the module to be placed near the drive it serves, and eliminates the need for a dedicated PLC rack slot for RIO communication.
Comprehensive Diagnostic Indicators: The 1203-GD1 features five front-panel LED indicators: Fault (red), SCANport STS, Health, Remote I/O ACT, and Remote STS (green) . These LEDs provide immediate visual confirmation of module power, SCANport communication status, RIO network activity, and fault conditions, enabling technicians to quickly diagnose cabling issues or configuration problems without external test equipment.
Broad SCANport Product Compatibility: The 1203-GD1 supports a wide range of Allen-Bradley SCANport products including 1305 AC MICRO Drive, 1336 IMPACT, 1336 PLUS, 1336 PLUS II, 1336 FORCE, 1336 REGEN, 1336 SPIDER, 1394 AC Multi-Axis Motion Control System, SMC Dialog Plus, SMP-3 Smart Motor Protector, 1397 Digital DC Drive, 1557 Medium Voltage Drive, and 2364F Regenerative DC Bus Supply . This extensive compatibility makes the 1203-GD1 a versatile communication solution across multiple drive families.
Configurable Rack and Baud Settings: The 1203-GD1 provides DIP switches for configuring rack size (1/4 through full rack), starting group, rack address, last rack designation, fault action, and baud rate . The module also includes a built-in selectable termination resistor (150 ohm) that can be enabled via jumper J2, simplifying RIO link termination in single-adapter configurations .
