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WebDAQ 504 Datasheet
Internet Enabled Vibration/Acoustic Logger

The WebDAQ 504 intelligent logger features remote monitoring andcontrol of real-time acoustic and vibration data.

Overview
The WebDAQ 504 is a stand-alone, acoustic and vibration logger designed for remote monitoring and control. All
the intelligence is built into the WebDAQ, eliminating the need for a PC or additional software. By using theembedded WebDAQ web server, users can easily configure simple or sophisticated applications, log vibration data,
update digital outputs and/or send notifications based on alarm conditions, and view real-time data from any
location and any device with a web browser.
The WebDAQ 504 performs high-accuracy measurements from up to four IEPE (Integrated Electronic Piezoelectric)
sensors. Housed in a heavy-duty chassis, the WebDAQ 504 is rugged enough for industrial applications such as
noise and vibration testing.

Integrated Software and Hardware
The WebDAQ Series embedded OS and web server provides an all-in-one package for stand-alone data logging andalarming. Users can monitor and control their applications from anywhere with a web browser. The WebDAQ web

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WebDAQ 504 Datasheet – Rev 1, June 2024
server is optimized for both desktop and mobile use. Users can perform data acquisition tasks from phones,
tablets, and laptops with a single, intuitive user interface.

Remote Access and Control
Install the WebDAQ 504 on any network and access it using any device with a web browser to remotely monitor
and control all operations.

Wireless Communication
After the WebDAQ is detected on a wired network, users can connect an approved WiFi adapter to the rear panel
and communicate with the WebDAQ over a wireless network. Refer to our website for a list of the WiFi adapters
approved for use with WebDAQ Series hardware.

Flexible Triggering
Start or stop the acquisition based on analog or digital thresholds, alarm states, or date/time values. On-demand
push button triggering is also supported.

WebDAQ Web Interface
An embedded web server provides a clean, intuitive interface to access all configuration and data managementtasks. Hardware, trigger, and alarm settings are contained in a single task, or “job”. Multiple “jobs” can be run in a“schedule” for more complex data logging applications. For example, users can create a schedule of jobs in which
one job automatically runs after an alarm condition is triggered on a different job, such as when a digital inputchanges.

Device-independent operation lets you remotely monitor and control the WebDAQ 504 from any device with a web browser.
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WebDAQ 504 Datasheet – Rev 1, June 2024

Introduction
Easy Setup – Powerful Capabilities
Jobs are the building blocks of WebDAQ. The ability to define different data logging jobs, or tasks, and add them toa schedule unleashes flexibility not seen in any other data logger.
Whether you want to set up a simple logging task or a complex task, jobs and a schedule make it easy andstraightforward.

What is a Job?

What is a Schedule?

The basic building block of WebDAQ, a job defineschannel configuration, logging options, start and stop
conditions, and alarming.

A schedule is a collection of jobs that gives flexibility todynamically change data logging attributes, such as
sampling rate, active channels configuration, or alarm levels.

Example:Switching from static acquisition to dynamic acquisition.
1 Schedule and 2 Jobs
Users can easily set up a job for a slow, static acquisition anda fast dynamic acquisition. When a trigger condition is met(i.e. over/under alarm), Job 1 (slow acquisition) ends and Job
2 (fast acquisition) begins. When the trigger condition returns
to normal, job 1 can be restarted.

Clear, Concise, Data Displays
WebDAQ users don’t need to rely on the small screens anddifficult to navigate displays of most other loggers. With
WebDAQ’s intuitive web interface, users can easily see theirdata and alarm conditions in real time or after the acquisition
is complete.

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WebDAQ 504 Datasheet – Rev 1, June 2024

Features
Alarm and Event Notifications
Create multiple alarms using analog or digital channel
sources. Configure alarms to reset and re-arm when
the condition clears or reset them remotely with yourbrowser. View the alarm status on the web interface.
Users can configure one or more events to record
when a job is started, stopped, or triggered, or if anerror condition is detected. Receive alarm and event
notifications on one or more addresses using email
and SMS messaging.

Virtually Unlimited Storage
Store data files and configuration settings locally ininternal flash memory or save to external media or
network folders. Users can map a network drive or
FTP server as the location to log data or store files.
Easily transfer files between WebDAQ storage
locations and mapped network storage locations.

Share Folders
Users can share a WebDAQ storage location or
specific folder over a local network.

Real-Time Data Display
View data as it is acquired or from a stored file. Data
can be plotted on strip chart and FFT displays. Users
can specify a range of data to view and zoom in or out.
Real-time FFTs allow continuous monitoring andanalysis. Users can apply windowing parameters with
software.

Control Read and Write Access
Users can control who can view and modify job
settings by defining a password and setting thesecurity level for the admin account. A “share”
password can be used to access a shared folder or FTP
server running on the WebDAQ.

Run the Schedule on Startup
Automatically run the schedule when the systemstarts up. Multiple jobs in the schedule are runconsecutively.

Real-Time ClockA real-time clock provides an absolute time reference
for timestamping data. The clock can be set to any
time zone and may be synchronized to the internet
time server.

Simultaneous Sampling
The WebDAQ performs simultaneous measurementsfrom up to four analog inputs at rates of up to 51.2

kS/s per channel. Users can configure each input forvoltage or IEPE sensor measurements.

Sensor Measurements
Users can configure IEPE channels to measureacceleration, sound pressure, velocity, and force. AC
coupling is automatically enabled for IEPE channels.
WebDAQ provides a minimum of 4 mA excitation
current and IEPE compliance voltage up to 19 V todrive internal circuitry. Users can configure voltage
channels for AC or DC coupling.

FFT Display
An FFT is displayed for each active channel in a job ona single FFT plot. The WebDAQ 504 performs aspectrum function on the time-domain data anddisplays the amplitude of the frequency response.
The data is scaled in dB based on the full-scale rangeof the sensor for that channel.
Users can configure the window type to apply to the
FFT data for each channel. The following window
types are supported: Hann, Hamming, BlackmanHarris, Blackman, Flattop, or None (Uniform).
The peak amplitude and frequency can be shown or
hidden, as desired.

FFT Triggering
An FFT trigger can be used for starting or stopping an
acquisition. Users can configure the channel to use as
the FFT trigger source, the FFT size, and the window
type to apply to the FFT data for the trigger. The
following window types are supported for the FFTtrigger: Hann, Hamming, Blackman-Harris, Blackman,
Flattop, or None (Uniform).
The WebDAQ 504 performs a Power Spectrum
function on the time-domain data of the selected FFTtrigger source.
The power frequency band and the total power inband threshold level to use for the FFT trigger areuser-configurable.
Users can also specify the number of samples toacquire before the trigger occurs.

Anti-alias Filtering
Built-in anti-alias filters automatically adjust to thesampling rate. Analog and digital filtering accurately
represents in-band and out-of-band signals. Signals
within the passband have frequency-dependent gain.

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WebDAQ 504 Datasheet – Rev 1, June 2024
A stopband filter attenuates all signals above thestopband frequency.

Isolated Digital I/O
The four isolated digital I/O lines can be used either
as triggers to start or stop the acquisition or as alarm
outputs.

Flexible Power Requirements
A Provide power with the 9 volt, 2.2 amp supply thatships with the device, or connect any 6 to 16 DC
supply.

Firmware Updates
Device firmware is bundled with the operating system
and web server in one update file. This allows the
WebDAQ to be updated in the field.

Calibration
The WebDAQ is factory-calibrated using a NISTtraceable calibration process. Specifications areguaranteed for one year. Return the device to thefactory for recalibration.

Functional Block Diagram

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WebDAQ 504 Datasheet – Rev 1, June 2024

Front and Rear Panels
Front Panel
BNC connectors and detachable screw terminals allow quick sensor and digital connections.

Rear Panel
The rear panel provides Ethernet and power connections, LED indicators, dual USB ports, one SD card slot, buttons,
and a ground connector.

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WebDAQ 504 Datasheet – Rev 1, June 2024

Specifications
All specifications are subject to change without notice. Typical for 0 °C to 50 °C unless otherwise specified.
Analog Input
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Number of channels: 4 analog input channels
ADC resolution: 24 bits
Type of ADC: Delta-Sigma (with analog prefiltering)
Sampling mode: SimultaneousInternal master timebase (fM)o Frequency: 13.1072 MHzo Accuracy: ±50 ppm max
Data rate range (fs): 1.652 kS/s min, 51.2 kS/s max. The data rate must remain within the appropriate data
range.
Data rates (fs): (fM ÷ 256)/n, where n = 1, 2, ..., 31.
Input coupling: AC/DC, software-selectable
AC cutoff frequency
o –3 dB: 0.5 Hzo –0.1 dB: 4.6 Hz max
Input range: ±5 V
AC voltage full-scale range: ±5 Vpk min, ±5.1 Vpk typ, ±5.2 Vpk max
Common-mode voltage range, AI- to earth ground: ±2 V max
IEPE excitation current; software selectable on/off: 2.0 mA min, 2.1 mA typ
Power-on glitch: 90 μA for 10 μs
IEPE compliance voltage: 19 V max
Overvoltage protection, with respect to chassis groundo Signal source connected to AI+ and AI–: ±30 V
o Low-impedance source connected to AI+ and AI–: –6 V to 30 V
Input delay: (40 + 5/512)/fs + 2.6 μs
Gain drift: 0.14 mdB/°C (16 ppm/°C) typ, 0.45 mdB/°C (52 ppm/°C) max
Offset drift: 19.2 μV/°C typ, 118 μV/°C max
Channel-to-channel matchingo Phase (fin in kHz): fin × 0.045° + 0.04 max
o Gain 0.01: dB typ, 0.04 dB max
Passbando Frequency: 0.45 × fs
o Flatness (fs = 51.2 kS/s): ±40 mdB (pk-to-pk max)
Phase nonlinearity, fs = 51.2 kS/s: ±0.45° max
Stopbando Frequency: 0.55 × fs
o Rejection: 100 dB
Alias-free bandwidth: 0.45 × fs
Oversample rate: 64 × fs
Crosstalk (1 kHz): –110 dB
CMRR, fin ≤ 1 kHz, 40 dB min: 47 dB typ
SFDR, fin = 1 kHz, –60 dBFS: 120 dB
Input impedance

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WebDAQ 504 Datasheet – Rev 1, June 2024ooCalibrated

Differential: 305 kΩ
AI– (shield) to chassis ground: 50 Ω
Measurement Accuracy
Measurement Conditions% Reading (Gain Error)
0 °C to 50 °C max±0.34%, ±0.03 dB ±25 °C ±5 °C typ±0.07%, ±0.006 dB

Idle Channel
Noise
Noise density

Idle Channel and Noise Density
51.2 kS/s
25.6 kS/s
97 dBFS
99 dBFS
50 µVrms
40 µVrms
310 nV/√Hz
350 nV/√Hz

Input AmplitudeTotal Harmonic Distortion (THD)
Condition–1 dBFS

Input amplitude–20 dBFS
Intermodulation distortion (–1dBFS)

DIN 250 Hz/8 kHz 4:1 amplitude
ratio
CCIF 11 kHz/12 kHz 1:1 amplitude
ratio% Reading (Offset Error)1±0.14%, ±7.1 mV±0.01%, ±0.5 mV

2.048 kS/s
103 dBFS
25 µVrms
780 nV/√Hz

Specification
1 kHz: –95 dB
8 kHz: –87 dB
1 kHz: –95 dB
8 kHz: –80 dB–80 dB–93 dB

Digital input/output
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Digital type: CMOS (Schmitt trigger) input / open drain output
Number of I/O: One port of 4 bits
Configuration: Bit configurable for input or output
Power on conditions: Power on reset is input mode
Pull-up configuration: Each bit is pulled up to 5 V with a 100 kΩ resistor
Input frequency range: DC – 10 kHz
Input high voltage threshold: 1.9 V min, 3.6 V max
Input low voltage threshold: 2.3 V max, 1.0 V min
Schmitt trigger hysteresis: 0.6 V min, 1.7 V max
Input high voltage limit: 15 V absolute max
Input low voltage limit: –0.5 V absolute min, 0 V recommended min
Output off state leakage current: 10 µA max
Output sink current capability: 100 mA max (continuous) per output pin
Output transistor on-resistance (drain to source): 1.6 Ω

Network•

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Ethernet type: 100 Base-TX, 10 Base-T

Range = 5.1 Vpk.
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WebDAQ 504 Datasheet – Rev 1, June 2024•••

Communication rates: 10/100 Mbps, auto-negotiatedConnector: RJ-45, 8 position
Cable length: 100 meters (328 feet) max

Network Configuration
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Network IP configuration: DHCP, link-local, statico DHCP may be disabled by the user and a static IP address assignedo If DHCP is enabled but is unsuccessful at obtaining an IP address the device will fall back to linklocal and request the IP address 169.254.100.100.
Network device name: The name used for detecting the device using mDNS (zero-conf). This name may bechanged using the web interface.
Network name publication: By mDNS
User accounts: admin and share. These accounts are case-sensitive and cannot be changed using the webinterface.

Factory default settings
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Factory default IP address: 192.168.0.101
Factory default subnet mask: 255.255.255.0
Factory default Gateway: 192.168.0.1
Factory default DHCP setting: DHCP + link-local enabled
Factory default password for admin account: admin. Passwords are case sensitive and can be changed
using the web interface.
Factory default password for share account: share. Passwords are case sensitive and can be changed using
the web interface.
Factory default device name: webdaq-xxxxxx, where xxxxxx is the last 6 digits of the MAC address (printed
on the label on the underside of the device).
Note: When factory defaults are restored, any shared folders or mapped drives are reset.

USB ports•••

Number of USB ports: Two, for connection to a mass storage device or approved WiFi adapter.
USB device type: USB 2.0 (high-speed)Device compatibility: USB 1.1, USB 2.0, USB 3.0

SD memory card slot••

Memory card type: SD, SDHC, SDXC, MMC, TransFlash
File systems supported: FAT16, FAT32, exFAT, ext2/3/4, NTFS

Push buttons•••

Power (POWER):o W1 jumper installed (factory default): Turns device on or off.
o W1 jumper removed (device on when power is applied): Reboots the device.
Function (FUNC): Unmounts external media, or starts/stops an acquisition.
Reset (CONFIG RESET): Restores network and alarm settings to factory default values.

Ground connector

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WebDAQ 504 Datasheet – Rev 1, June 2024•

Connector port for the #6-32 ground screw.

Power
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Input voltage: Center positive, 6 VDC to 16 VDC
Input wattage: 4 W typ, 10 W max
External AC adapter: 9 VDC, 2.2 amps, 110 VAC to 240 VAC input range
Battery: One 3 V button cell lithium battery (BR1225 or CR1225); replaceable

Shock
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Operating shock: 30 g, 11 ms half sine; 18 shocks at 6 orientations

Mechanical••

Dimensions (L × W × H): 158.8 × 146.1 × 38.1 mm (6.25 × 5.75 × 1.50 in.)o With BNC connectors: 178.8 × 146.1 × 38.1 mm (7.04 × 5.75 × 1.50 in.)
Weight: 680 g (1.5 lb)

Environmental
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Operating temperature range: : 0 °C to 50 °C max operating, –40 °C to 85 °C storage
Ingress protection: IP 30
Humidity: 10-90% RH, noncondensing (Operating), 5-95% RH (Storage)
Maximum altitude: 2,000 m (6,562 ft)
Pollution Degree: 2
The WebDAQ 504 is intended for indoor use only but may be used outdoors if installed in a suitableenclosure.

Ordering Information
HardwarePart No.
6069-410-006-1

Description
WebDAQ 504: Internet enabled vibration and acoustic logger with four analog inputs,
simultaneous sampling, IEPE signal conditioning, embedded operating system and web
server; includes the ATS018T-W090V power supply with USA, UK, and Europe plugs.

Accessories
Part No.
6069-240-005
6069-240-006

Description
ACC-205: DIN-rail mounting kit; requires the ACC-404 panel/ wall mounting kit.
ACC-404: Panel/wall mounting kit; use with the ACC-205 to mount on a DIN rail.

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WebDAQ 504 Datasheet – Rev 1, June 2024

WebDAQ Series

6069-410-005-1

WebDAQ 316: Internet enabled data logger with 16 thermocouple inputs and 4 DIO lines,
embedded operating system and web server; includes the ATS018T-W090V power supply
with USA, UK, and Europe plugs.

6069-410-007-1

WebDAQ 904: Internet enabled universal input logger with four analog inputs,
simultaneous sampling, support for multiple measurement types, embedded operating
system and web server; includes the ATS018T-W090V power supply with USA, UK, andEurope plugs.

About Digilent
Digilent is committed to making engineering accessible, offering competitive pricing, portable products, andcomprehensive documentation. Specializing in test and measurement devices, Xilinx-based FPGA development
boards, a variety of expansion modules for customizing applications, and robust options for DAQ and datalogging,our design philosophy champions your creativity. By emphasizing speed, modularity, customizability, and worldclass support, we provide the building blocks while you bring the brilliance.

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