Comprehensive Product Summary – Dataforth MAQ20‑VSN Voltage Input Module

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### 1. Product Overview

Product Name: MAQ20‑VSN
Model Number: MAQ20‑VSN
Series: MAQ®20 Industrial Data Acquisition and Control System
Article Number: MAQ20‑VSN
Manufacturer: Dataforth Corporation, Tucson, Arizona, USA
Product Type: DIN‑rail‑mounted, 16‑channel, single‑ended voltage input module for the MAQ20 system backbone

The MAQ20‑VSN is part of Dataforth’s modular MAQ®20 family of high‑performance, industrial‑grade signal conditioning and data acquisition modules. It provides 16 single‑ended voltage input channels with individually configurable ranges and alarm settings. Designed for rugged industrial environments, it integrates seamlessly into the MAQ20 backbone for distributed measurement and control applications.

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### 2. Key Features

- High‑Density Input: 16 single‑ended voltage input channels per module.
- Selectable Input Ranges: ±5 V, ±10 V, ±20 V, ±40 V, ±60 V (default ±5 V).
- High Accuracy: ±0.035 % of span typical, including linearity, hysteresis, and repeatability.
- High Isolation: 1500 Vrms channel‑to‑bus isolation for one minute.
- Robust Input Protection: 240 Vrms continuous field I/O protection; ANSI/IEEE C37.90.1 transient protection.
- Wide Power Range: Operates from 7 VDC to 34 VDC system power.
- Industrial Temperature Range: –40 °C to +85 °C operating and storage.
- Per‑Channel Configuration: Each channel independently configurable for range, alarms, and averaging.
- Advanced Alarm Functions: High, Low, High‑High, and Low‑Low alarms with tracking or latching behavior and programmable deadbands.
- Signal Averaging: Configurable exponential averaging with selectable weighting (2⁰–2¹⁵).
- High Scan Rate: 200 channels per second aggregate throughput.
- Hot‑Swappable: Modules can be inserted or removed without system power‑down.
- Automatic Registration: System firmware automatically detects and registers modules.
- CE and ATEX Compliance (pending): Designed for heavy industrial EMC environments.
- Software Integration: Fully supported by Dataforth ReDAQ Shape and MAQ20 Configuration Software Tool; Modbus‑compatible memory map for easy integration.

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### 3. Technical Specifications

| Parameter | Specification |
|----------------|------------------|
| Input Channels | 16 single‑ended voltage inputs |
| Input Ranges | ±5 V, ±10 V, ±20 V, ±40 V, ±60 V (default ±5 V) |
| Over/Under‑Range | ±2 % beyond nominal range measurable |
| Accuracy | ±0.035 % of span |
| Linearity/Conformity | ±0.02 % of span |
| Resolution | 0.012 % of span |
| Zero Tempco | ±15 ppm/°C |
| Span Tempco | ±35 ppm/°C |
| Bandwidth | 3 Hz |
| Scan Rate | 200 channels/s |
| Common‑Mode Voltage (CMV) | 1500 Vrms channel‑to‑bus isolation |
| Channel‑to‑Channel Isolation | 0 V (single‑ended configuration) |
| Common‑Mode Rejection (CMR) | 100 dB @ 50/60 Hz |
| Normal‑Mode Rejection (NMR) | 30 dB @ 50/60 Hz |
| Input Protection | 240 Vrms continuous, ANSI/IEEE C37.90.1 transient |
| 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. 100 g (typical) |
| Operating Temperature | –40 °C to +85 °C |
| Storage Temperature | –40 °C to +85 °C |
| Relative Humidity | 0–95 %, non‑condensing |
| EMC Emissions | EN 61000‑6‑4 ISM Group 1, Class A |
| EMC Immunity | EN 61000‑6‑2 ISM Group 1, Performance A/B |
| Certifications | CE, UL/CUL Class I Div 2 Groups A–D (pending), ATEX (pending) |

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### 4. Functionality

The MAQ20‑VSN module converts analog voltage signals from field sensors into digital data accessible through the MAQ20 system’s Modbus‑compatible memory map. Each channel can be configured for a specific voltage range, alarm thresholds, and averaging parameters. The module communicates with the MAQ20‑COMx communications module via the system backbone, which distributes both power and data.

Typical Use Cases:
- Industrial process monitoring (pressure, flow, level, voltage feedback)
- Test and measurement systems requiring multiple voltage inputs
- Distributed data acquisition in manufacturing or energy facilities
- Laboratory instrumentation and automated test stands
- Remote monitoring via Ethernet/Modbus TCP through MAQ20‑COMx

Compatibility:
- Works with all MAQ20 backbones (MAQ20‑BKPLx)
- Controlled via MAQ20‑COMx communication modules (Ethernet, USB, RS‑232/485)
- Supported by ReDAQ Shape HMI software, MAQ20 Configuration Tool, and LabVIEW VIs
- Modbus register addressing ensures interoperability with third‑party SCADA or PLC systems

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### 5. Components & Accessories

Included:
- MAQ20‑VSN module with pluggable terminal block for field wiring
- ESD‑safe packaging and documentation

Optional Accessories:
- MAQ20‑BKPLx backbones (various slot counts)
- MAQ20‑COMx communication modules
- MAQ20‑PWR3 auxiliary power supply module
- ReDAQ Shape software (Developer #MAQ20‑940, User #MAQ20‑941)
- MAQ20‑945 Configuration Software Tool
- IPEMotion software interface (MAQ20‑952)
- DIN‑rail mounting hardware and extension cables

Connectors:
- 20‑position pluggable terminal block (field side)
- Shield terminals tied to field common, isolated from bus
- External shield‑to‑ground connection if required

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### 6. Installation & Setup

Mounting:
- DIN‑rail mountable; designed for quick insertion/removal.
- Align top rear hook with DIN rail, slide down, and snap into place.
- Modules can be mounted in 3U vertical spacing increments.
- Hot‑swappable—no need to power down the system.

System Integration Steps:
1. Install MAQ20‑BKPLx backbone on DIN rail.
2. Insert MAQ20‑COMx communication module in the leftmost slot and apply power.
3. Insert MAQ20‑VSN module into any available slot; automatic registration occurs within one second.
4. Connect field wiring to the terminal block and verify LED indicators.

Configuration:
- Channel ranges, alarms, and averaging configured via Modbus registers or Dataforth software tools.
- Settings can be saved to EEPROM for retention after power cycles.
- Modules identified by registration number rather than physical position; software tools allow reordering.

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### 7. Performance & Capabilities

Measurement Performance:
- 16 simultaneous single‑ended inputs with independent configuration.
- 200 samples per second aggregate throughput.
- 3 Hz analog bandwidth suitable for low‑frequency process signals.
- Hardware low‑pass filtering for 50/60 Hz noise rejection.

Alarm System:
- Four alarm types per channel: High, Low, High‑High, Low‑Low.
- Configurable as tracking or latching.
- Programmable deadbands to prevent false triggers.
- Alarm status accessible via Modbus registers; red ALM LED indicates active alarms.

Averaging and Data Handling:
- Exponential running average with selectable weighting (2⁰–2¹⁵).
- Registers store current, minimum, maximum, and average values.
- Last eight readings per channel available for trend analysis.

Reset and Reliability:
- Standard Reset restores last saved configuration.
- Reset‑to‑Default returns to factory settings.
- Power‑on and brown‑out detection ensure predictable startup.
- Watchdog and communication error counters accessible for diagnostics.

Limitations:
- Single‑ended inputs share common reference; not suitable for high differential isolation between channels.
- 3 Hz bandwidth limits use for high‑frequency signals.

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### 8. Standards & Compliance

- Quality System: ISO 9001:2008‑registered QMS
- Electrical Safety: UL/CUL Class I Division 2 Groups A, B, C, D (pending)
- EMC Compliance:
- EN 61000‑6‑4 (Emission, ISM Group 1 Class A)
- EN 61000‑6‑2 (Immunity, ISM Group 1 Performance A/B)
- Transient Protection: ANSI/IEEE C37.90.1
- Environmental: Designed for heavy industrial environments, –40 °C to +85 °C operation.
- CE Marking: Conforms to applicable EU directives.
- ATEX Certification: Pending for hazardous locations (Class I Div 2).

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### 9. Additional Information

Warranty:
- Standard hardware warranty: one (1) year from date of delivery.
- Software warranty: thirty (30) days from delivery.
- Special products: sixty (60) days.
- Warranty covers defects in materials and workmanship; excludes misuse, over‑stress, or improper handling.
- Returns require a Return Material Authorization (RMA).

Repair & Returns:
- Contact Dataforth Customer Service at +1 520‑741‑1404 or 800‑444‑7644.
- Ship prepaid to:
Dataforth Corporation
3331 E. Hemisphere Loop, Tucson, AZ 85706 USA
- Include model number, serial number, contact information, and RMA number on the package.

Support & Documentation:
- Technical support: techinfo@dataforth.com
- Website: [www.dataforth.com](https://www.dataforth.com)
- Manuals:
- MA1041 Hardware User Manual (this document)
- MA1036 Quick Start Guide
- MA1037 Configuration Software Tool Manual
- MA1038 ReDAQ Shape User Manual
- Application engineers available for system design assistance.

Maintenance:
- Modules are hot‑swappable; replacement does not require system shutdown.
- Periodic inspection of terminal connections recommended.
- Firmware updates available via Dataforth website.

LED Indicators:
- PWR (Blue): Power status; solid = normal.
- STAT (Green): Module status; 1 Hz blink = normal, 5 Hz blink = module detect.
- TX/RX (Yellow): Communication activity; rapid blink = active.
- ALM (Red): Alarm condition; solid = alarm active.

Corporate Information:
Dataforth Corporation designs and manufactures high‑performance signal conditioning, data acquisition, and data communication products for industrial automation. With over 25 years of experience and a global distribution network, Dataforth maintains ISO 9001:2008 certification and provides worldwide technical support.

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### Summary

The Dataforth MAQ20‑VSN is a precision, 16‑channel, single‑ended voltage input module engineered for the MAQ20 modular data acquisition platform. It combines high accuracy, robust isolation, and flexible configuration in a compact DIN‑rail form factor. Each channel supports multiple voltage ranges and independent alarm and averaging settings, making the module ideal for scalable, distributed measurement systems in demanding industrial environments. With 1500 Vrms isolation, 240 Vrms continuous protection, and operation from –40 °C to +85 °C, the MAQ20‑VSN delivers reliable performance in harsh conditions. Integration with Dataforth’s ReDAQ Shape and configuration tools ensures rapid setup, intuitive monitoring, and seamless connectivity to Modbus‑based control systems.