Comprehensive Product Summary – ExpertDAQ EX9065D-M RS485 Modbus Digital I/O Module

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### 1. Product Overview

Product Name: ExpertDAQ EX9065D-M
Model: EX9065D-M
Series: EX-9000 Series (Digital I/O Modules)
Article Number: EX9065D-M
Manufacturer: ExpertDAQ

The ExpertDAQ EX9065D-M is a robust, industrial-grade digital I/O module designed for distributed control systems and remote data acquisition applications. It provides a combination of 4 isolated digital input channels and 5 relay output channels, communicating via RS-485 using the Modbus RTU protocol. The module is engineered for high reliability, wide temperature operation, and seamless integration into industrial automation networks.

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### 2. Key Features

- Dual Functionality: 4 isolated digital inputs and 5 relay outputs (Form A, normally open).
- Communication Interface: RS-485, 2-wire, supporting Modbus RTU protocol.
- High Channel Isolation: 3750 Vrms isolation for inputs and 4000 V surge strength for outputs.
- Relay Output Capacity: Each relay channel supports up to 5A at 250 VAC or 5A at 30 VDC.
- Wide Power Supply Range: Operates from +10 VDC to +30 VDC, allowing flexible power integration.
- LED Indicators: 11 status LEDs for real-time monitoring of input/output states.
- Extended Temperature Range: Reliable operation from -25°C to +75°C.
- Dual Watchdog System: Hardware and software watchdogs ensure continuous operation and system safety.
- Galvanic Isolation: Complete isolation between input, output, and communication circuits for noise immunity.
- Compact and Durable Design: Built for industrial environments with high electrical noise and temperature variations.
- Modbus RTU Compatibility: Fully compliant with Modbus RTU standard for easy integration with PLCs, SCADA, and HMI systems.
- EEPROM Configuration Storage: Retains configuration data such as address, baud rate, and protocol settings even after power loss.
- Manual or Software Configuration: Supports both hardware-based INIT* mode and software configuration commands.

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### 3. Technical Specifications

Digital Inputs (DI):
- Channels: 4 isolated input channels (common source)
- Input Type: Dry contact, open collector, or TTL/CMOS compatible
- Input Impedance: 3 kΩ
- Logic Level 0: +1 V max
- Logic Level 1: +4 V to +30 V
- Isolation Voltage: 3750 Vrms

Digital Outputs (DO):
- Channels: 5 relay output channels (Form A, normally open)
- Contact Rating: 5A @ 250 VAC / 5A @ 30 VDC
- Surge Strength: 4000 V
- Operate Time: 6 ms max
- Release Time: 3 ms max
- Minimum Life Expectancy: 10⁵ operations
- Isolation: 4000 V between channels and logic

Electrical Characteristics:
- Power Supply: +10 VDC to +30 VDC
- Power Consumption: 1.5 W typical
- Communication Interface: RS-485, 2-wire
- Baud Rates Supported: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 bps
- Protocol: Modbus RTU (default), switchable to Normal mode

Environmental:
- Operating Temperature: -25°C to +75°C
- Storage Temperature: -30°C to +75°C
- Humidity: 10% to 90% RH, non-condensing

Mechanical:
- Mounting: DIN-rail or panel mount
- Enclosure: Industrial-grade plastic housing
- LED Indicators: 11 (for DI/DO status and power)
- Isolation: Galvanic isolation between I/O and communication lines

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### 4. Functionality

The EX9065D-M functions as a remote digital I/O expansion module for industrial control systems. It connects to a host controller (PLC, PC, or HMI) via RS-485 and communicates using the Modbus RTU protocol.

Operation:
- The 4 digital inputs can detect logic states, switch closures, or TTL signals.
- The 5 relay outputs can control external devices such as solenoids, lamps, or contactors.
- Each channel’s status is displayed via onboard LEDs for easy diagnostics.
- The module supports both manual configuration (via INIT* switch) and software configuration (via Modbus commands).

Use Cases:
- Industrial automation and process control
- Building management systems (BMS)
- Remote monitoring and data acquisition (DAQ)
- Machine control and equipment interfacing
- Energy management and environmental monitoring

Compatibility:
- Compatible with Modbus RTU master devices such as PLCs, SCADA systems, and industrial PCs.
- Supports up to 256 modules on a single RS-485 network (without repeater, up to 1200 m cable length).

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### 5. Components & Accessories

Included Components:
- EX9065D-M module
- User manual and configuration guide
- Mounting hardware (DIN-rail clips)

Optional Accessories:
- RS-485 to USB converter for PC configuration
- RS-485 repeaters for extended communication distance
- Power supply (10–30 VDC external source)
- Terminal blocks for I/O wiring

Connectors:
- Screw terminal blocks for DI/DO and power connections
- RS-485 communication terminals (D+, D–, GND)

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### 6. Installation & Setup

Requirements:
- DC power supply (10–30 VDC)
- RS-485 network connection (2-wire twisted pair)
- Host controller with Modbus RTU master capability

Mounting Options:
- DIN-rail mounting (standard)
- Panel mounting (optional)

Configuration:
- Default Modbus RTU settings:
- Address: 01
- Baud Rate: 9600 bps
- Data Format: 8N1
- INIT* Mode: Used to reset or reconfigure module parameters.
- Accessed via INIT* pin or rear switch.
- Allows resetting address, baud rate, and checksum settings.

Setup Steps:
1. Connect power supply and RS-485 lines.
2. Configure module address and baud rate via Modbus commands or INIT* mode.
3. Connect input and output devices to terminal blocks.
4. Verify LED indicators for power and I/O status.
5. Integrate into Modbus network and test communication.

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### 7. Performance & Capabilities

Speed & Communication:
- RS-485 communication up to 115.2 kbps
- Supports Modbus RTU function codes for reading/writing digital I/O and counters

Capacity:
- 4 digital input channels
- 5 relay output channels
- Up to 256 modules per RS-485 network

Efficiency & Reliability:
- Low power consumption (1.5 W)
- Fast switching (6 ms operate, 3 ms release)
- Dual watchdog system ensures continuous operation
- EEPROM retains configuration data after power loss

Limitations:
- Relay outputs limited to 5A per channel
- Maximum cable length 1200 m without repeater
- Requires external DC power supply

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### 8. Standards & Compliance

Communication Standards:
- RS-485 (EIA/TIA-485 compliant)
- Modbus RTU protocol (industry standard)

Electrical & Safety:
- Input isolation: 3750 Vrms
- Output surge strength: 4000 V
- Dielectric strength: 2500 Vrms

Environmental Compliance:
- Designed for industrial temperature range (-25°C to +75°C)
- RoHS compliant materials
- EMC immunity suitable for industrial environments

Certifications:
- CE compliant (EMC and safety)
- RoHS compliant

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### 9. Additional Information

Watchdog Features:
- Module Watchdog: Hardware circuit monitors internal operation and resets module if malfunction occurs.
- Host Watchdog: Software function monitors communication with host; if timeout occurs, outputs revert to safe state.

Safe and Power-On Values:
- Configurable safe and power-on output states ensure predictable behavior after reset or communication loss.
- Commands `~AA4V` and `~AA5V` allow reading and setting these values.

Maintenance:
- Minimal maintenance required; periodic inspection of wiring and terminal connections recommended.
- Firmware version can be read via `$AAF` command for update verification.

Firmware & Updates:
- Firmware version readable via Modbus command `$AAF` (e.g., version D03.11).
- Updates available through ExpertDAQ support channels.

Warranty & Support:
- Standard manufacturer warranty (typically 2 years, depending on region).
- Technical support and documentation available from ExpertDAQ.
- Software tools provided for configuration and diagnostics.

Modbus Mapping Summary:
| Address Range | Function | Access | Description |
|----------------|-----------|---------|-------------|
| 00001–00005 | Digital Outputs (DO1–DO5) | R/W | Relay output control |
| 00033–00036 | Digital Inputs (DI0–DI3) | R | Input status |
| 00065–00068 | DI Latch High | R | Latched high input states |
| 00097–00100 | DI Latch Low | R | Latched low input states |
| 00264 | Clear Latch | W | Reset latched input states |
| 30001–30004 | DI Counters | R | Input pulse counters |
| 00513–00516 | Clear DI Counters | W | Reset input counters |

Modbus Function Codes Supported:
- 0x01: Read Coil/Output Status
- 0x02: Read Discrete Inputs
- 0x03/0x04: Read Input Registers (Counters, WDT values)
- 0x05: Write Single Coil / Clear Counter
- 0x0F: Write Multiple Coils / Set Safe or Power-On Values
- 0x06: Set Watchdog Timeout Value

Network Integration:
- Supports up to 256 modules per RS-485 bus
- Maximum cable length: 1200 m (without repeater)
- Termination resistors recommended at both ends of the RS-485 line

Safety & Reliability:
- Galvanic isolation prevents ground loops and protects against voltage surges.
- Dual watchdogs prevent system hang-ups.
- EEPROM ensures configuration persistence.

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### Summary

The ExpertDAQ EX9065D-M is a versatile and reliable RS-485 Modbus RTU digital I/O module designed for industrial automation, remote monitoring, and control applications. With 4 isolated digital inputs and 5 relay outputs, it provides flexible interfacing between field devices and control systems. Its wide operating voltage, extended temperature range, and robust isolation make it suitable for harsh industrial environments.

The module’s dual watchdog system, EEPROM configuration storage, and Modbus RTU compliance ensure high reliability and easy integration into existing automation infrastructures. Whether used in factory automation, building control, or process monitoring, the EX9065D-M delivers dependable performance and long-term stability.

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Manufacturer: ExpertDAQ
Model: EX9065D-M
Interface: RS-485 (Modbus RTU)
I/O Configuration: 4 DI / 5 DO (Relay)
Isolation: 3750–4000 Vrms
Operating Voltage: 10–30 VDC
Operating Temperature: -25°C to +75°C
Relay Rating: 5A @ 250 VAC / 30 VDC
Communication Speed: Up to 115.2 kbps
Compliance: CE, RoHS
Applications: Industrial automation, remote I/O, SCADA, BMS, machine control

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End of Product Summary – ExpertDAQ EX9065D-M