Product Description of ProSoft MVI94-DNP

MVI94-DNP (DNP 3.0 Master/Slave Communication Module) is a dual-port DNP 3.0 master station / slave station communication module specially developed by ProSoft for the Rockwell Flex I/O (1794) platform. Through two independent serial interfaces, it enables stable data interconnection between the Flex I/O system and DNP 3.0 intelligent electronic devices (IED), RTUs, and SCADA systems in the power, water supply, and oil/gas industries. It is specifically designed for distributed remote monitoring and data acquisition. 

I. Model Analysis

MVI94: Flex I/O (1794) Platform-specific Series

DNP: DNP 3.0 Distributed Network Protocol

Core Positioning: DNP 3.0 Level 2+, Master + Slave dual mode, dual independent serial ports, RS-232/422/485, single slot, external power supply, massive data points, Report By Exception (RBE)

II. Core Hardware Specifications

Compatible Platforms

Flex I/O (1794) Full Series

Single-slot installation, can be placed at any position in the Flex rack

Backplane Power Consumption: 20mA @ 5.1VDC (extremely low load)

External Power Supply: 12~24VDC, 170~340mA

Serial Interfaces (Dual Ports, Fully Isolated)

Configuration Port (P1): 1 × RS-232 (Mini-DIN/DB9), hardware handshake, used for configuration/debugging

Application Port (P2): 1 × RS-232/422/485 (DB9, on-site jumpers optional)

RS-232: Point-to-Point (15m)

RS-422: Full-Duplex Long-Distance (1200m)

RS-485: Half-Duplex Multi-Point (32 Nodes, 1200m)

Electrical Isolation: 500Vrms Optical Isolation (Port - Backplane, Port - Port)

Baud Rate: 110 ~ 115200 bps

Data Format: 8/N/1, 8/E/1, 8/O/1

Protocols and Functions

Protocol: DNP 3.0 Subset Level 2 (supports some Level 3 functions)

Role: Master (Master) + Slave (Slave) Dual Mode

Master Capabilities

Maximum connection of 40 DNP Slave Stations (IED/RTU)

Support for 300 User-defined Commands

ProSoft Technology Inc

Command Support: Continuous polling, single trigger, event trigger

Slave Capabilities

As a DNP Slave Station connected to the SCADA Master Station

Support for Report By Exception (RBE)

Event Cache and Timestamp

Data Point Capacity (Maximum)

Digital Input (DI): 15630 Points

Digital Output (DO): 15630 Points

Analog Input (AI): 960 Points

Analog Output (AO): 960 Points

Counter (Ctr): 480 Points

LED Status: OK, BP, P1, P2, ERR, COM Status Indicators

Environment and Certification

Operating Temperature: 0°C ~ +60°C

Storage Temperature: -40°C ~ +85°C

Humidity: 5% ~ 95% (No Condensation) 

Vibration Resistance: 30g (Operation), 50g (Non-operation)

Certification: CE, UL/cUL, RoHS

III. Core Functions and Performance

1. DNP 3.0 Master Mode (Active Acquisition)

Active Polling: Flex I/O System actively acquires remote IED, RTU, instrument data

Large-capacity Slave Stations: Single port supports 40 Slave Stations, meeting large-scale remote measurement and control requirements

Command Engine 300 configurable commands: function code, slave station address, data address, point count, polling cycle. ProSoft Technology Inc.

Conditional polling: data change, timing, event trigger, optimizing network bandwidth

Error handling: automatic retry, timeout, fault isolation

Data mapping: direct mapping of DNP data to Flex I/O processor data file

2. DNP 3.0 slave station mode (system access)

SCADA access: Flex I/O as a DNP slave station, directly accessing the power/water SCADA system

Frequent change self-reporting (RBE)

Only report when data changes, significantly reducing network load

Support for event caching, timestamp, priority. ProSoft Technology Inc.

Data security: configurable read-only / read-write areas to protect critical control data

High-speed response: independent processor, zero Flex processor load

3. Dual-port full isolation (high reliability)

Dual-port independence: P1/P2 completely independent, can run simultaneously as master station + slave station or dual master stations / dual slave stations

Three-level electrical isolation: 500Vrms isolation, anti-earth potential difference, lightning protection, anti-strong electromagnetic interference

Multi-topology adaptation: full coverage of RS-232/422/485, suitable for point-to-point, long-distance, multi-point bus

4. Deep integration of Flex I/O system

Ultra-low backplane load: only 20mA @ 5V, does not affect Flex system power consumption budget

Asynchronous data exchange: DNP communication and Flex backplane transmission asynchronous, does not affect I/O refresh

Full status mapping: module status, port status, communication quality, error code → Flex processor label

Configuration tool: ProSoft Configuration Builder (PCB)

Visual DNP address, command list, data point mapping

Online monitoring, event log, message capture

Four. Core advantages

1. Professional DNP 3.0 power-level communication

Level 2+ full support: compatible with all standard DNP 3.0 devices

Master station + slave station dual mode: one module solves the dual requirements of acquisition and access

Mass data points: 15k+ digital quantities, nearly 100 analog quantities, meeting the requirements of large-scale SCADA

Frequent change self-reporting (RBE): industrial remote measurement and control standard, optimal bandwidth

500V full isolation: power / industrial field-level reliability

2. Special optimization for Flex I/O

Single slot, any position: seamless expansion of Flex system

External 12~24V power supply: does not occupy backplane power

Very low backplane load (20mA): safer system design

Plug-and-play: sample programs, configuration templates, rapid deployment

3. Industrial-level reliability

Wide temperature range, shock resistance, no fan

Dual-port redundancy / parallel

Independent processor: does not affect Flex system in case of failure

Global certifications: power, water supply, oil and gas industry standards

Five. Typical application scenarios

Power remote monitoring: Flex I/O accessing DNP 3.0 power grid SCADA, substation IED

Water supply / sewage treatment: pump station, pipeline, water plant DNP 3.0 RTU data acquisition

Oil and gas long-distance pipeline: remote valve room, instrument, RTU distributed monitoring

Mining / metallurgy: remote field equipment DNP 3.0 networking

Upgrade of Flex I/O old system: quickly add DNP 3.0 communication to protect investment Multi-system Interconnection: Flex I/O ↔ DNP 3.0 PLC, RTU, SCADA Master Station

VI. Summary

MVI94-DNP is a dedicated solution for integrating the Rockwell Flex I/O platform with the DNP 3.0 network. With core advantages including DNP 3.0 Level 2+ master/slave dual mode, dual independent fully isolated serial ports (RS-232/422/485), massive data point support, real-time self-reporting (RBE), extremely low backplane power consumption, industrial-level isolation, and deep integration of Flex I/O, it is specifically designed for remote data collection, SCADA access, and distributed measurement and control scenarios in industries such as power, water supply, oil and gas, and mining. It is a high-performance, highly reliable, one-stop standard module for implementing DNP 3.0 industrial networking in the Flex I/O system.