D4-RSDC Remote Serial Data Concentrator

Description

The AutomationDirect D4-RSDC functions as a remote serial data concentrator, bridging the gap between serial-based field devices and D4-series PLC backplanes. It serves as a central translator, converting data from RS-232/485 devices—such as barcode scanners, VFDs, and temperature controllers—into a format compatible with the PLC’s native protocol, and vice versa. This positions it uniquely in the automation stack: above field-level sensors but below the main controller, ensuring that data from disparate devices is standardized before reaching the PLC.

D4-RSDC

What distinguishes the AutomationDirect D4-RSDC is its ability to manage up to 16 concurrent serial connections without data collision, thanks to advanced buffering and prioritization algorithms. It also includes built-in surge protection on all serial ports, safeguarding against voltage transients common in industrial wiring harnesses, and supports both master and slave modes, making it flexible enough to integrate into existing networks or anchor new installations.

D4-RSDC

Technical specifications:
Model Number D4-RSDC
Brand AutomationDirect
Type Remote Serial Data Concentrator
Input Voltage 24V DC (logic)
Operating Temp Range -10°C to 70°C (14°F to 158°F)
Mounting Style DIN Rail, Panel Mount
Dimensions 4.8in x 3.5in x 1.8in (122mm x 89mm x 46mm)
Weight 0.9 lbs (0.41kg)
Interface/Bus D4-series PLC Backplane, 4x RS-232/485 ports
Compliance CE, UL 61010, RoHS
Supported Protocols Modbus RTU, ASCII, D4 native protocol
Typical Power Draw 5W (max)

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D4-RSDC

Main features and advantages:

Choosing the AutomationDirect D4-RSDC delivers tangible operational advantages that enhance system agility and reduce integration complexity. Its ability to consolidate multiple serial devices onto a single backplane connection eliminates the need for separate communication modules, simplifying control cabinet design and reducing wiring clutter—a critical benefit in space-constrained environments. The module’s intelligent data buffering ensures that time-sensitive commands (like emergency stop signals) are prioritized, preventing delays that could lead to equipment damage or safety incidents. For engineers, the AutomationDirect D4-RSDC reduces the learning curve associated with mixed-protocol systems; its intuitive configuration software allows for quick setup of baud rates, parity settings, and device addressing, cutting commissioning time by up to 30% compared to manual serial network configuration. Most importantly, its robust design ensures consistent performance over time, minimizing unplanned maintenance and keeping communication channels open even in environments with high electromagnetic interference.

D4-RSDC

Application areas:

The AutomationDirect D4-RSDC excels in applications where reliable serial communication is the linchpin of operational success. In water and wastewater treatment plants, it connects remote flow meters, level sensors, and valve controllers to the central PLC, ensuring that treatment processes are adjusted in real time based on accurate, timely data—critical for meeting regulatory discharge standards. In warehouse automation, it links barcode scanners, conveyor controllers, and automated guided vehicle (AGV) systems, enabling seamless coordination of inventory movement and order fulfillment. It also proves invaluable in pharmaceutical manufacturing, where it integrates serial-based analytical instruments (like pH meters and dissolved oxygen sensors) with the main control system, ensuring that batch data is accurately logged for compliance and quality control. In each of these settings, the AutomationDirect D4-RSDC thrives under the demands of 24/7 operation, withstanding the humidity, dust, and electrical noise that are common in industrial environments.

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