Technical Specifications
Supports a maximum of seven groups with up to eight modules per group. Width is 2.63 inches (66.8 mm) and height is 5.04 inches (128 mm) excluding power supply. Two 26-pin female D-shell expansion ports are provided. Top port is for inbound expansion cable, bottom port is for daisy-chaining or terminator plug. Data transfer rates are 5 Mbps or 2.765 Mbps depending on implementation. Backplane current is 70 mA at 5V or 20 mA at 3.3V. Three on-board LED lights indicate device status.
Functional Features
Maximum cable length is 15 meters (50 feet) for multi-rack and 1 meter (3.3 feet) for single-ended. Power supply installation on the module provides power to connected expansion modules. If
Application Scenarios
System expansion beyond single-rack limits, distributed I/O architectures, large-scale machine control, and process systems requiring extended module counts.
Performance Parameters
5 Mbps data transfer rate supports high-speed expansion. Seven groups of eight modules each provide significant expansion capacity. LED diagnostics indicate power, communication, and fault status.
Material Composition
Industrial-grade housing with D-shell connectors and backplane interface circuitry.

Structural Characteristics
Compact module with two 26-pin D-shell expansion ports. Requires companion power supply for expansion rack operation.
Working Principle
The module receives expansion bus signals from the transmitter or upstream receiver via the top port. It regenerates backplane signals for local modules and passes data to downstream racks via the bottom port.
Installation Requirements
Install in expansion rack. Connect expansion cable from transmitter or previous receiver to top port. Install terminator plug or next rack cable to bottom port. Mount required power supply on this module.
Usage Precautions
Do not exceed maximum cable lengths for reliable communication. Ensure proper power supply sizing for all connected modules. Verify data transfer rate matches the transmitter setting.













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