Log4 PoE

The best inline PoE power logging system.

About The Log4 PoE

The Log4 PoE displays accurate readings of voltage, current, and power while also simultaneously logging all measurement data to a MicroSD card and/or the free dedicated PC software.

The Log4 PoE device is specifically designed to measure the low positive voltages of Power over Ethernet (PoE) connected equipment with high accuracy.

Log4 POE

Features




Graphic Display

Each Log4 can display readings in both numeric and graphic formats, with a high refresh rate, and very low power consumption. The display offers great sunlight readability and includes an adjustable backlight for low light viewing.

Battery Powered

Each Log4 device is independently powered by a compact internal lithium polymer battery. This allows for measurement with greater accuracy as the Log4 itself draws no power from the supply of the device you test.

Alarms

Alarm thresholds can be optionally set to trigger both audible and visual alarms. The communications protocol also allows for seamlesss event-based broadcast of these alarms.

Open Protocol

Data is streamed from the Log4 via both USB and TTL level serial connections. The format of the transmitted data is an open protocol which can be utilized by devices such as an Arduino or Raspberry Pi.

Isolated Serial

Both data terminals are isolated from the measurement connections so that the connected PC and the devices being tested are protected from potential earth loops and voltage spikes.

.csv file Format

Logged session data is recorded to a micro-SD card in standard .csv format. Your data can be readily opened, reviewed, edited, and plotted using standard spreadsheet applications.

Terminal Connection

Alternate connection can be made via spring terminals so that you can wire the Log4 directly into a circuit and test a wider range of voltages in numerous other measurement applications.

Desktop Application

Each Log4 partners with a freely downloadable desktop application that supports both Mac and PC platforms. This software can be used to display detailed real-time graphical and statistical information.

Specifications





Measurement

Range:
Auto Ranging
Resolution:
24 bit, PGA Enhanced
Channels:
2


Voltage measurement
Maximum:
70V
Minimum:
0V

Current measurement
Maximum:
5000mA
Minimum:
50uA

Sampling

Range:
Adjustable
Timestamp:
Realtime Clock,
User/Auto-set,
Date & Time


Sampling period Limits
Maximum:
60 minutes
Minimum:
STANDALONE - 2 millisecond
DESKTOP - 1 millisecond (PC performance dependent)

Battery

Chemistry:
3.7V, 1-cell Lithium Polymer
Capacity:
1200mAh
Battery Life:
5.1 days @ 10ms sampling
Charging:
200mA/h, Isolated,
via MicroUSB port

Inputs & Outputs

Measurement connections
Ethernet:
IN RJ45-8P8C, OUT RJ45-8P8C
Terminals:
RJ45 Breakout Adaptor
(option)


Isolated data interface
USB:
Micro-USB, Type B
USART:
Standard 100mil Header,
3V3 & 5V logic compatible

Standalone logging
Media:
MicroSD Card

Alarms

Types:
Visual - LED (Bi-colour)
Audible - Integrated Buzzer
Thresholds:
OVER - Voltage, Current, Power
UNDER - Voltage, Current, Power

Display

Resolution:
128 x 128 Pixels
Color Depth:
Monochrome
Technology:
Sharp Memory LCD
Backlight:
Discrete, Adjustable

Size & Weight

Dimensions:
85.7 x 65.0 x 28.4
(W x D x H, mm)
Weight:
145 grams
Note: Specifications are preliminary and subject to change. See Kickstarter for details.

Software



Windows

Version: 2.5.2

System requirements

PC running Windows xp sp3 or higher
FTDI VCP Drivers
DOWNLOAD 
PC 


MD5 checksum: 239f42ec94743bb8aaceec9fe6ca84c7

MAC

Version: 2.5.2

System requirements

MAC running OS X 10.6.8 or higher
FTDI VCP Drivers (Only For < OS X 10.9)
DOWNLOAD 
Mac 


MD5 checksum: b6e111d5ef40cb917f820f72a8f79b4f

LINUX - PC

Version: 2.4.1

System requirements

PC running x64 Ubuntu Linux 18.04 or higher
Installation Guide
DOWNLOAD 
PC TAR Package 


MD5 checksum: eb302a7cec87a0fc2e4b68aa9e6eb5f0

Raspberry Pi 4 Image

Version: 2.4.1

System requirements

Raspberry Pi 4 (4GB RAM) and a SD Card (16GB or higher)
Installation Guide
DOWNLOAD 
Raspberry Pi Image 


MD5 checksum: bbb0823b5cc2e2d5e748ab09923d476d

Linux - ARMV8 x64

Version: 2.4.1

System requirements

Raspberry Pi 4 running x64 Ubuntu 19.10 Server or higher
OR
Jetson Nano running Image R32.2.1 or higher
Installation Guide
DOWNLOAD 
ARM TAR Package 


MD5 checksum: 649bcb6db1ca9acd8d768555a93f20f5

Documentation


Datasheet
19/07/2017
PDF
Manual
27/10/2020
PDF
Protocol
06/05/2020
PDF
Protocol
11/12/2018
PDF
Git
-
LINK [EXTERNAL]
FTDI Download Center
-
LINK[EXTERNAL]

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