DVP40EH00R3 DELTA DVP-EH3 Series High-Performance PLC

Product Overview

The DVP40EH00R3 (DVP40EH00R3) is a premier 40-point main processing unit from Delta's flagship DVP-EH3 series. Representing the latest "R3" hardware revision, this PLC is engineered for demanding industrial environments that require a balance of high-speed logic execution and robust load switching. As a "Base Unit," it integrates 24 digital inputs and 16 relay outputs in a single chassis. The EH3 series is the most powerful in the DVP-E line, featuring superior program capacity and enhanced communication capabilities, making the DVP40EH00R3 ideal for complex applications such as large-scale HVAC systems, water treatment facilities, and automated production lines with mixed-voltage actuators.

Technical Configuration

The DVP40EH00R3 hardware architecture is built around a high-speed CPU capable of executing basic instructions in just 0.24 $\mu s$. It features 24 high-speed digital inputs and 16 mechanical relay outputs. The "R" designation indicates dry-contact outputs, which provide the versatility to switch both AC and DC voltages (up to 250 VAC / 30 VDC) without additional circuitry. The unit boasts a massive 30k step program capacity and 12k words of data registers. For system integration, it is equipped with three independent communication ports (RS-232 and dual RS-485), allowing it to act as a central hub for HMIs, drives, and sensors via the Modbus protocol.

Technical Specifications

Technical FAQs

What are the key improvements in the "R3" version?

The "R3" suffix indicates the latest hardware revision for the EH3 series. It maintains full backward compatibility with the "R2" version but typically includes optimized internal power regulation and improved electromagnetic interference (EMI) protection to ensure stable operation in increasingly noisy industrial electrical environments.

Can the DVP40EH00R3 be used for motion control?

While the DVP40EH00R3 features high-speed inputs for encoder feedback (up to 200 kHz), its relay outputs are mechanical and cannot be used for high-frequency pulse-train output (PTO) required for servo drives. For PTO motion control, a transistor model (e.g., DVP40EH00T3) is required. However, the relay model is excellent for basic position control using VFDs and limit switches.

How many expansion modules can I add?

The EH3 series supports up to 512 total I/O points. You can add a wide variety of right-side expansion modules, including digital I/O, analog I/O, temperature measurement (PT/TC), and specialized communication modules.

Engineering & Installation Guide

• Relay Durability: Mechanical relays are rated for approximately 2 A per point. When switching inductive loads (like motor contactors or solenoids), the resulting back-EMF arc can degrade the contacts. It is highly recommended to install an RC snubber for AC loads or a flyback diode for DC loads across the external device to significantly extend the life of the PLC’s internal relays.

• Wiring Precision: Given the 40-point density, ensure all field wiring uses insulated ferrules to prevent "stray hair" short circuits. The "H Type" AC input (100–240 VAC) should be connected with a dedicated circuit breaker. Always connect the "G" terminal to a low-resistance earth ground to maintain the integrity of high-speed input signals.

• Mounting and Airflow: Install the unit horizontally on a 35 mm DIN rail. To ensure proper heat dissipation for the high-speed CPU, maintain at least 50 mm of vertical clearance above and below the unit. Avoid mounting the PLC directly above high-heat sources like power transformers or braking resistors.