Comprehensive Product Summary – Dataforth MAQ20-DIOH

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### 1. Product Overview

Product Name: MAQ20-DIOH
Model Number: MAQ20-DIOH
Series: MAQ20® Industrial Data Acquisition and Control System
Article Number: MAQ20-DIOH
Manufacturer: Dataforth Corporation
Manufacturer Address: 3331 E. Hemisphere Loop, Tucson, AZ 85706, USA
Website: [www.dataforth.com](http://www.dataforth.com)
Contact: techinfo@dataforth.com | Phone: +1 520-741-1404 | Toll-Free: 800-444-7644

The MAQ20-DIOH is a high-voltage discrete input/output module designed for the MAQ20® modular data acquisition and control platform. It provides 4 isolated digital input channels (90–280 VAC/VDC) and 4 isolated digital output channels (24–280 VAC). The module mounts directly on a DIN rail and connects to the MAQ20 backbone for power and communication distribution. It is engineered for rugged industrial environments, offering high isolation, transient protection, and compliance with industrial EMC and safety standards.

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### 2. Key Features

- High-Voltage Discrete I/O:
- 4 isolated input channels supporting 90–280 VAC/VDC.
- 4 isolated output channels rated for 24–280 VAC loads.

- Industrial-Grade Isolation:
- 1500 Vrms channel-to-bus isolation.
- 300 Vrms channel-to-channel isolation.
- ANSI/IEEE C37.90.1 transient protection.

- Rugged Design:
- Operates from –40 °C to +85 °C.
- 240 Vrms continuous field I/O protection.
- Reverse polarity and overload protection on all channels.

- System Integration:
- Fully compatible with the MAQ20 backbone and COM modules.
- Automatic module registration and hot-swappable design.
- Modbus-compatible memory map for easy integration with SCADA and PLC systems.

- Advanced Functionality:
- Supports seven programmable special functions (pulse/frequency counting, waveform measurement, PWM, etc.).
- Configurable alarms (High, Low, High-High, Low-Low) with mappable outputs.
- User-defined default output states for safe startup conditions.

- Ease of Use:
- DIN-rail mountable with pluggable terminal blocks.
- LED indicators for power, status, communication, and alarms.
- Supported by Dataforth’s ReDAQ Shape and Configuration Software tools.

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### 3. Technical Specifications

| Parameter | Specification |
|----------------|------------------|
| Input Channels | 4 isolated, 90–280 VAC/VDC |
| Output Channels | 4 isolated, 24–280 VAC |
| Isolation | 1500 Vrms channel-to-bus, 300 Vrms channel-to-channel |
| Input Protection | Continuous 350 VAC/VDC, reverse polarity protected |
| Output Protection | Continuous 350 VAC/VDC, reverse polarity protected |
| Transient Protection | ANSI/IEEE C37.90.1 |
| Input Turn-On/Off Time | 20 ms / 30 ms (AC), 1 ms / 1 ms (DC) |
| Output Response Time | 0.5 cycle typical |
| Power Supply Current | 30 mA typical |
| Dimensions (H × W × D) | 114.6 mm × 15.3 mm × 82.8 mm (4.51 × 0.60 × 3.26 in) |
| Weight | Approx. 150 g |
| Operating Temperature | –40 °C to +85 °C |
| Storage Temperature | –40 °C to +85 °C |
| Humidity | 0–95 % RH, non-condensing |
| Mounting | DIN rail, MAQ20 backbone |
| Compliance | CE, EN61000-6-2, EN61000-6-4, ATEX pending, UL/CUL pending |
| Enclosure | Industrial-grade ventilated housing |

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### 4. Functionality

The MAQ20-DIOH module provides discrete signal interfacing for high-voltage AC or DC systems. Each input channel detects logic states based on voltage thresholds, while each output channel uses solid-state switching to control external loads.

Operation Principles:
- Inputs: Detect ON/OFF states of AC or DC signals within 90–280 V range.
- Outputs: Control AC loads up to 280 V using solid-state relays.
- Logic Convention: Inverted logic—writing “0” closes the output switch; reading “0” indicates input above threshold.
- Isolation: Each channel is galvanically isolated to prevent ground loops and ensure signal integrity.

Applications:
- Industrial automation and process control.
- Machine monitoring and equipment interlocking.
- Power distribution and facility management systems.
- Remote I/O expansion for PLCs and SCADA systems.
- High-voltage signal interfacing in manufacturing and utilities.

Compatibility:
- Works with all MAQ20-COMx communication modules (Ethernet, USB, RS‑232/485).
- Configurable via Dataforth’s ReDAQ Shape or MAQ20 Configuration Software.
- Modbus RTU/TCP accessible for third-party integration.

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### 5. Components & Accessories

Included Components:
- MAQ20-DIOH module.
- Pluggable terminal block for field I/O connections.
- DIN-rail mounting clip.
- Quick start documentation.

Optional Accessories:
- MAQ20-BKPLx backbones (various slot counts).
- MAQ20-COMx communication modules.
- MAQ20-PWR3 auxiliary power supply module.
- ReDAQ Shape software (Developer/User versions).
- IPEMotion software for advanced data acquisition.

Connectors:
- 20-position pluggable terminal block for field wiring.
- Backbone connector for power and communication bus.

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### 6. Installation & Setup

Mounting Procedure:
1. Align the module with the DIN rail and MAQ20 backbone.
2. Hook the top edge onto the rail and rotate downward until it snaps into place.
3. Connect field wiring to the pluggable terminal block.
4. Power the system via the MAQ20-COMx module.

Setup Process:
- Modules auto-register upon installation.
- Each module receives a unique registration number for addressing.
- Configuration is performed via software tools or Modbus registers.
- Default output states can be defined and stored in EEPROM.

Requirements:
- 7–34 VDC system power (supplied through backbone).
- Proper ESD handling during installation.
- Adequate ventilation for thermal dissipation.

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### 7. Performance & Capabilities

Electrical Performance:
- Input detection threshold: 90 V minimum (AC/DC).
- Output switching: 24–280 VAC, 0.5 cycle response.
- Channel-to-channel isolation ensures no cross-interference.

Functional Performance:
- Supports up to 24 modules per system (384 channels total).
- Scan/update rate: 3500 channels per second.
- Hot-swappable without system shutdown.
- Distributed processing: Each module handles local data acquisition and control.

Special Functions (Programmable):
1. Pulse/Frequency Counter: Up to 10 MHz counting, 10 M events.
2. Pulse/Frequency Counter with Debounce: 3 kHz max, noise rejection.
3. Waveform Measurement: Frequency, duty cycle, pulse width, period.
4. Time Between Events: Measures timing between two input events.
5. Frequency Generator: 0–10 kHz square wave output.
6. PWM Generator: 200 µs minimum period, dual outputs per timer.
7. One-Shot Pulse Generator: Programmable pulse width and delays.

Alarm Capabilities:
- Configurable High, Low, High-High, and Low-Low alarms.
- Alarms can trigger discrete outputs or software notifications.
- Tracking or latching modes available.

Limitations:
- Output derating required at high ambient temperatures or full load.
- Adjacent high-power modules may require spacing for thermal management.

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### 8. Standards & Compliance

Quality Management:
- Manufactured under ISO 9001:2008-registered QMS.

Electrical & EMC Compliance:
- EN61000-6-4: Industrial emissions, Class A.
- EN61000-6-2: Industrial immunity, Group 1.
- ANSI/IEEE C37.90.1: Surge and transient protection.

Safety & Environmental:
- CE compliant for heavy industrial environments.
- UL/CUL Class I, Division 2 (Groups A, B, C, D) pending.
- ATEX certification pending for hazardous locations.

Environmental Ratings:
- Operating temperature: –40 °C to +85 °C.
- Humidity: 0–95 % non-condensing.
- Designed for harsh industrial and outdoor environments.

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### 9. Additional Information

Warranty:
- Hardware: 1 year from date of delivery.
- Software: 30 days from delivery.
- Special products: 60 days.
- Warranty covers defects in materials and workmanship.
- Excludes damage from misuse, overvoltage, or improper installation.

Support & Service:
- Technical support via phone or email.
- Application engineering assistance available.
- RMA (Return Material Authorization) required for returns or repairs.

Maintenance:
- Modules are maintenance-free under normal operation.
- Periodic inspection of wiring and terminal connections recommended.
- Firmware updates available through Dataforth’s website.

Repair Policy:
- Return defective units to Dataforth (Tucson, AZ) with RMA number.
- Out-of-warranty repairs billed at current service rates.

Critical Application Notice:
Dataforth products are not intended for life-support or safety-critical systems. Use in such applications is at the user’s own risk.

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### Summary

The Dataforth MAQ20-DIOH is a robust, high-voltage discrete I/O module engineered for industrial automation and control systems requiring reliable AC/DC signal interfacing. With four isolated input and output channels, wide voltage ranges, and comprehensive protection features, it ensures safe and accurate operation in demanding environments. Its integration within the MAQ20 modular platform provides scalability, distributed intelligence, and seamless communication via Modbus. The module’s programmable functions, alarm capabilities, and software configurability make it a versatile component for complex control architectures, while its rugged design and compliance with industrial standards guarantee long-term reliability in mission-critical applications.