Product Overview

The DVP40EH00R2 (DVP40EH00R2) is a versatile 40-point main processing unit from Delta's DVP-EH2/EH3 series. Engineered for reliability in standard industrial automation tasks, this base unit features a robust relay output configuration, making it an excellent choice for controlling high-voltage devices or applications where electrical isolation between the PLC and the field load is required. Its compact design and high-performance instruction set provide a stable foundation for small-to-medium-scale machine control, ranging from packaging lines to conveyor monitoring and specialized factory floor automation.

Technical Configuration

As a standard base unit, the DVP40EH00R2 is powered by an AC input, facilitating easy integration into cabinets utilizing standard 100–240 VAC power supplies. The relay-type outputs offer high versatility for switching diverse loads, including AC contactors, solenoids, and indicators, without requiring intermediate interfacing components. This model is part of the EH series, which is recognized for its high-speed processing capabilities and extensive instruction library, allowing for efficient development of complex control logic for repetitive industrial sequences.

Technical Specifications

FAQs

What are the advantages of using relay outputs?

Relay outputs are highly flexible as they can switch both AC and DC loads and provide significant electrical isolation between the internal PLC circuitry and the external field devices. This makes them ideal for applications involving high-voltage switching where secondary isolation might otherwise be required.

Is this unit compatible with high-speed input/output functions?

While the EH2/EH3 series is powerful, relay outputs have mechanical switching time limitations. For high-speed applications like servo positioning or pulse-train output, a transistor-output model (T-type) is recommended. The relay model (R-type) is best suited for slower-cycling industrial tasks.

How does this unit fit into the EH3 series ecosystem?

The DVP40EH00R2 is fully integrated into the EH3 series standard, meaning it shares the same programming syntax and software tools (WPLSoft/ISPSoft) as other EH3 units, allowing for straightforward expansion and code reuse within the Delta automation platform.

Installation and Operational Guidelines

• Mechanical Mounting: Secure the PLC horizontally on a standard 35 mm DIN rail. To ensure effective cooling, maintain at least 50 mm of unobstructed clearance above and below the chassis, as relay modules generate internal heat during frequent switching cycles.

• Safety Interlocks: Because relay contacts are mechanical, they are subject to wear over time. For critical safety functions or processes with very high switching frequencies, use the PLC to drive an external interposing relay or contactor to preserve the life of the PLC’s internal relays.

• Noise Mitigation: When switching inductive loads (coils, solenoids), always install a surge suppression device (such as an RC circuit or flyback diode) across the load to prevent back-EMF from arcing across the relay contacts, which can cause premature contact failure.