Comprehensive Product Summary – EX9251‑MTCP

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### 1. Product Overview

Product Name: Modbus TCP/IP to Isolated Digital I/O Module
Model: EX9251‑MTCP
Series: EX‑92xx‑MTCP Digital I/O Series (Dual LAN Port)
Article Number: EX9251‑MTCP
Manufacturer: TOPSCCC (Taiwan)
Website: [www.topsccc.com.tw](http://www.topsccc.com.tw)

The EX9251‑MTCP is an industrial‑grade Ethernet data acquisition and control module designed for distributed digital I/O applications. It belongs to the EX‑92xx‑MTCP family, which integrates mixed digital input, digital output, and counter channels in a single compact device. The module supports Modbus/TCP and UDP protocols for open connectivity with SCADA, PLC, and HMI systems. It features dual RJ‑45 Ethernet ports with auto‑bypass protection, enabling daisy‑chain network topologies without communication loss during power interruptions.

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### 2. Key Features

- Mixed I/O Configuration:
10 isolated digital inputs (dry contact), 4 isolated digital outputs (open collector, NPN type), and 2 isolated differential hardware counters.

- Industrial Ethernet Interface:
Dual 10/100 Mbps RJ‑45 ports with built‑in Ethernet switch and auto‑bypass protection for daisy‑chain networking.

- Protocol Support:
Fully compliant with Modbus/TCP over TCP/IP and UDP/IP. Supports up to eight simultaneous UDP data stream destinations.

- Isolation & Protection:
3750 Vrms optical isolation between I/O channels and logic circuitry. Over‑voltage and power‑reversal protection on supply input.

- Advanced Digital Output Modes:
- DIO Synchronization (Mirror DI to Local/Remote DO): Automatically mirrors input states to local or remote outputs.
- Auto‑Off Time Mode: Monostable output operation with programmable timeout.
- High/Low Delay Output: Configurable delay for rising or falling transitions.
- Pulse Output Mode: Up to 300 Hz per channel.

- Counters:
Two 32‑bit hardware counters (DI10, DI11) with differential inputs, up to 4.5 kHz frequency, 30 V DC max input.

- Power‑On & Safe Values:
User‑definable output states at power‑up or host watchdog timeout.

- Software Ecosystem:
Supported by TOPSCCC’s Windows utility, Modbus/TCP OPC server, DLL API, and TCPDAQ ActiveX controls for integration with Visual Basic, C++, Delphi, and SCADA systems.

- Web Server:
Embedded HTTP server for remote monitoring and control via standard web browsers.

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### 3. Technical Specifications

| Parameter | Specification |
|------------|---------------|
| Digital Inputs | 10 × isolated single‑ended (dry contact, common source) |
| Input Logic | Logic 0 = closed to GND; Logic 1 = open |
| Counter (software) | 300 Hz, 32‑bit + 1‑bit overflow |
| Digital Outputs | 4 × isolated open‑collector (NPN) |
| Output Voltage | +5 V – 30 V DC |
| Max Load Current | 500 mA per channel |
| Pulse Output | 300 Hz max |
| Hardware Counters | 2 × differential inputs (C0 = DI10, C1 = DI11) |
| Counter Range | 0 – 4,294,967,285 (32‑bit + overflow) |
| Input Frequency | 4.5 kHz max |
| Input Impedance | 2 kΩ |
| Input Voltage | Logic 1 = +5 – 30 V DC; Logic 0 = ≤ +2 V DC |
| Isolation Voltage | 3750 Vrms (optical) |
| Ethernet Interface | Dual RJ‑45 10/100 Base‑T IEEE 802.3/802.3u with auto‑bypass |
| Communication Protocols | Modbus/TCP (TCP port 502), UDP (ASCII port 1025, event port 5168), HTTP (port 80) |
| Power Supply | Unregulated +10 V – +30 V DC input |
| Power Consumption | 3.5 W typical |
| Indicators | Power LED (yellow), Link/Activity LEDs (green) |
| Operating Temperature | –10 °C to +70 °C (14 °F to 158 °F) |
| Storage Temperature | –25 °C to +85 °C (–13 °F to 185 °F) |
| Humidity | 5 – 95 % RH non‑condensing |
| Mounting | DIN‑rail or wall mount |
| Wiring | 14 – 28 AWG terminal block connections |
| Dimensions / Weight | Compact industrial enclosure (typical EX‑92xx form factor) |

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### 4. Functionality

Operation Principle:
The EX9251‑MTCP acts as a remote digital I/O node on an Ethernet network. It converts Modbus/TCP or UDP commands into isolated digital input/output operations. Inputs detect dry‑contact closures, while outputs drive external devices via open‑collector transistors. Two differential counter channels capture high‑speed pulse signals such as from encoders or flow sensors.

Use Cases & Applications:
- Industrial automation and process control
- Remote machine monitoring and alarm systems
- Building management and energy metering
- Production line data acquisition
- Distributed I/O expansion for PLCs or SCADA systems
- Event counting and digital signal timing applications

Compatibility:
Interoperable with any Modbus/TCP‑compliant controller, PLC, or HMI. Supported by TOPSCCC’s OPC server and Windows utility. Provides DLL and ActiveX interfaces for custom software development.

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### 5. Components & Accessories

Included in Package:
- EX9251‑MTCP module (assembled with DIN‑rail clip)
- Product CD (manuals, drivers, utilities)
- Panel mounting bracket
- Quick start manual

Optional Accessories:
- External 24 V DC power supply
- Ethernet cables (Cat 5 or better)
- Additional DIN‑rail mounting hardware

Connectors:
- Dual RJ‑45 Ethernet ports (auto‑MDI/MDIX)
- Plug‑in screw terminal blocks for I/O and power connections

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### 6. Installation & Setup

Requirements:
- IBM‑compatible PC (Pentium or higher)
- Windows 95/98/2000/NT/XP/7/8/10 or later
- 10/100 Mbps Ethernet interface
- Power supply +10 – 30 V DC

Mounting Options:
DIN‑rail or wall‑mount installation. Ensure adequate ventilation and protection from corrosive gases.

Network Configuration:
- Factory default IP: 10.0.0.1
- Subnet Mask: 255.255.255.0
- Gateway: 10.0.0.1
- DHCP: Disabled (can be enabled via utility)
- Web Server: Disabled by default

Each module must have a unique IP address. Configuration can be performed using the EXPERTDAQ Ethernet I/O Utility or via ASCII commands. The INIT switch on the rear panel allows resetting to factory defaults.

Daisy‑Chain Networking:
Modules can be linked in series using the dual Ethernet ports. Auto‑bypass protection maintains network continuity within ~1 s if a module loses power. Maximum segment length per link: 100 m.

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### 7. Performance & Capabilities

- Data Rate: Up to 100 Mbps Ethernet throughput
- Digital Input Response: Supports latch and counter modes (300 Hz software count)
- Counter Performance: 4.5 kHz hardware count rate, 32‑bit resolution
- Digital Output Switching: 300 Hz pulse rate, 500 mA load per channel
- Latency: Deterministic Modbus/TCP response for real‑time control
- Reliability: Auto‑bypass network recovery ≈ 1 s after power loss
- Watchdog Functions: Dual watchdog system (module and host) ensures fail‑safe operation
- Limitations: Total load current per module should not exceed aggregate thermal limits; maximum Ethernet segment length 100 m per link.

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### 8. Standards & Compliance

- Ethernet Standards: IEEE 802.3 (10 Base‑T), IEEE 802.3u (100 Base‑TX)
- Communication Protocols: Modbus/TCP (Port 502), UDP (Ports 1025 and 5168), HTTP (Port 80)
- Electrical Safety: 3750 Vrms isolation between I/O and logic
- Environmental: Designed for industrial temperature range –10 °C to 70 °C
- EMC and ESD Protection: Meets industrial immunity requirements for electrostatic discharge and surge protection
- Regulatory Compliance: Conforms to industrial automation and network equipment standards for Ethernet I/O modules

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### 9. Additional Information

Warranty: 1 year limited manufacturer warranty against defects in materials and workmanship.
Repairs or replacements are provided free of charge within the warranty period for authorized returns.

Support & Maintenance:
- Technical support via TOPSCCC website and authorized distributors
- Firmware updates available through the utility software
- Regular inspection recommended for terminal tightness and environmental conditions

Software & Integration Tools:
- EXPERTDAQ Ethernet I/O Utility: Graphical configuration and monitoring tool.
- TCPDAQ ActiveX Control: For Visual Basic, Delphi, C++, and Borland C++ Builder integration.
- TCPDAQ DLL API: Comprehensive function library for TCP/UDP communication, stream/event handling, and Modbus operations.
- OPC Server: For integration with OPC client applications and SCADA systems.
- Web Server Interface: Built‑in HTTP monitoring page for real‑time I/O status and control.

Maintenance Guidelines:
- Operate within specified temperature and humidity limits.
- Protect against static discharge in low‑humidity environments.
- Use proper grounding and shielded cables for noise immunity.
- Periodically verify firmware version and update if necessary.

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### Summary

The TOPSCCC EX9251‑MTCP is a robust, high‑performance Ethernet digital I/O module that combines 10 isolated digital inputs, 4 isolated digital outputs, and 2 high‑speed counters in a single compact unit. Its dual LAN architecture with auto‑bypass protection ensures network reliability in industrial environments. Supporting standard Modbus/TCP and UDP protocols, the module integrates seamlessly with existing automation systems and SCADA software. Advanced features such as DIO synchronization, auto‑off timing, and programmable delay outputs provide flexible control capabilities. With 3750 Vrms isolation, wide power input range, and comprehensive software support, the EX9251‑MTCP is an ideal solution for distributed data acquisition and industrial Ethernet I/O applications.