Helmholz 700-200-LAN01 User manual

Helmholz GmbH & Co. KG | Hannberger Weg 2 | 91091 Großenseebach | Germany 30.01.2024
Phone [phone] | Fax [phone] | [e-mail] | www.helmholz.de
Quickstart Guide
Ethernet Cable Guard
Order number: 700-200-LAN01
Version
en
1

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Content
1Safety instructions ................................................................................................ 3
2Introduction ......................................................................................................... 3
3Function of the Ethernet Cable Guard .................................................................. 4
4Connection........................................................................................................... 4
4.1 Power supply ............................................................................................................................... 4
4.2 Network ....................................................................................................................................... 5
5Initial commissioning ........................................................................................... 5
5.1 Display of the operating statuses via the LEDs............................................................................... 6
6Website ................................................................................................................ 7
6.1 Access to the website.................................................................................................................... 7
6.2 Main view.................................................................................................................................... 7
6.3 Firmware Update.......................................................................................................................... 8
6.4 Factory Reset ................................................................................................................................ 8
7Technical data ...................................................................................................... 9

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1Safety instructions
Target audience
This description is only intended for trained personnel qualified in control and automation
engineering who are familiar with the applicable national standards. For installation,
commissioning, and operation of the components, compliance with the instructions and
explanations in this operating manual is essential. The specialist personnel is to ensure that the
application or the use of the products described fulfills all safety requirements, including all applicable laws,
regulations, provisions, and standards.
Intended use
The device has a protection rating of IP 20 (open type) and must be installed in an electrical
operating room or a control box/cabinet to protect it against environmental influences. To
prevent unauthorized operation, the doors of control boxes/cabinets must be closed and
possibly locked during operation. The consequences of improper use may include personal
injury to the user or third parties, as well as property damage to the control system, the product, or the
environment. Use the device only as intended!
Operation
Successful and safe operation of the device requires proper transport, storage, setup, assembly,
installation, commissioning, operation, and maintenance. Operate the device only in flawless
condition. The permissible operating conditions and performance limits (technical data) must
be adhered to. Retrofits, changes, or modifications to the device are strictly forbidden.
Security
The device is a network infrastructure component and therefore an important element in the
security consideration of a plant. When using the device, therefore, observe the relevant
recommendations to prevent unauthorized access to installations and systems.
2Introduction
This document explains the initial commissioning of the Ethernet Cable Guard.
The latest version of the documentation can be found at www.helmholz.de or
scan the QR code directly.

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3Function of the Ethernet Cable Guard
The Ethernet Cable Guard enables the service life monitoring of Ethernet data cables (100Base-TX) with a
focus on dynamic applications in automation technology, such as a trailing cable to moving machine
parts (robots). With the Ethernet Cable Guard, system availability can be increased, and downtimes can
be planned. This enables a significant reduction in maintenance costs.
The Cable Guard is looped into the cable harness to be monitored and can provide information about the
quality of the cable connection via a status LED, a separate network connection or a digital output. The
feedback can be displayed as a PWM signal at the output. The alarm limit value can be set individually
("lifetime" 99 - 50 %).
For integration into IIoT structures, the monitored cable status can also be sent via MQTT by the Cable
Guard.
The particularly compact design is suitable for use in decentralized control cabinets and can be mounted
on standard DIN rails.
The Cable Guard is also suitable for EtherCAT, EtherNet/IP and 2-pair PROFINET applications.
4Connection
4.1 Power supply
The Cable Guard be supplied with DC 24 V at the wide-range input DC 18 ... 28 V via the
supplied connector plug.
The housing of the Cabel Guard is not grounded. Please connect the functional earth terminal
(“FE”) of the PN/PN Coupler properly to the reference potential.
The device is intended to be supplied by an isolated Limited Energy Source according to UL61010-1
(3rd ed cl. 9.4) or according to UL60950-1/UL62368-1 or Class 2 according to NEC. Please use Cu
power supply wires, AWG 28-12. Maximum length of removed insulation is 10 mm. Temperature
cable rating is 87 °C.

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4.2 Network
The Cable Guard has two "DATA" RJ45 connections for the link to be monitored.
The cable to be monitored (e.g. a trailing cable) must be connected to the lower
connection ("Guard"). The upper DATA connection should then be connected to
the communication partner (e.g. the control unit) using another standard
industrial Ethernet cable.
The Cable Guard is thus looped into the cable to be monitored via these two
connections.
The cable measurement is carried out at the lower "Guard DATA" connection over the entire cable
(minimum length 2 m) up to the connected communication partner. The Cable Guard does not
change the content of the data transmission between the DATA connections.
Data transmission between the two DATA connections only works if the Cable Guard is supplied
with power and is in normal operating mode!
The left RJ45 Ethernet socket "LAN" is used to connect a TCP/IP network for accessing the web interface
and sending MQTT messages.
5Initial commissioning
Please connect the device to the power supply. Please also note the information above on using the
functional earth (FE).
As soon as the DATA connections are connected via Ethernet cables and the links are in place (see ports
of the RJ45 connections), a teach-in must be carried out for the device to function correctly (this also
applies to any cable replacement).
To do this, press the SET button for 20 seconds. As soon as the PWR and
STATUS LEDs light up red continuously, the teach-in is started. Now
release the SET button. The PWR LED now lights up green and the status
LED flashes green, the teach-in is carried out and the cable is now
calibrated.
Once the teach-in process is complete, the PWR and STATUS LEDs light up green continuously. This is
the normal operating status of the device. Monitoring of the cable is now active.
The teach-in values are permanently stored in the device and are retained even in the event of a power
failure or a firmware update (software update).
The teach-in process is only necessary after reinstalling the Cable Guard or after replacing the cable.

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The status of the line is displayed via the STATUS LED:
Green = The cable is OK
Flashing red = Maintenance of the cable is required (plan replacement)
Permanently red = The cable is defective
Data transmission between the two DATA connections only works if the Cable Guard is supplied
with power and is in normal operating mode!
Further configuration and more information about the status of the Cable Guard can be found on the
device's website.
If the Cable Guard is restarted after a teach-in or if there has been a power failure, the measurement
takes a few seconds until a measured value is available again. This is indicated after the restart by a
green flashing STATUS LED (initialization).
5.1 Display of the operating statuses via the LEDs
Ready for operation &
Line is OK:
PWR and STATUS are
permanently green
Teach-In / Initialization:
PWR is permanent green
STATUS flashes green
Maintenance required:
PWR is permanent green
STATUS flashed red
Cable defective:
PWR is permanent green
STATUS is permanent red
No teach-in performed:
Only PWR is green
Teach-in faulty:
PWR flashes alternately
red/green

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6Website
6.1 Access to the website
Connect the LAN interface of the Cable Guard to your PC using a standard Ethernet cable. When
accessing the website for the first time, set your PC interface to the appropriate subnet, e.g. with the IP
address 192.168.0.1 with subnet mask 255.255.255.0 for LAN access.
Open the website in a current browser with "https://192.168.0.32".
For security reasons, the web interface can only be accessed via a secure HTTPS connection. To
access the website, an exception rule may need to be confirmed in the browser. In the "Settings"
menu, you can store your own certificate for securing the connection if required.
When you log in for the first time, you will be asked to set a password for the default
user "admin". The password must be at least 8 characters long.
Please memorize the password well! For security reasons, there is no way to
reset the password without resetting the device to factory settings.
6.2 Main view
After logging in, the Cable Guard "Home"
website always opens.
The main view contains information
about the device and cable status.
The menu on the left-hand side contains
additional functions for further
configuration or firmware updates
For further information on the
configuration options, please refer to the
manual.

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6.3 Firmware Update
The firmware update can be accessed on the
web interface via the "Update" menu item.
The current firmware version is displayed and
a new firmware can be uploaded to the device
using the "Browse new firmware file" button.
The Cable Guard saves the firmware file in its
internal memory. After the device is restarted,
the firmware is checked. If the content is
correct, the firmware is used, otherwise the
device is restarted with the old firmware.
Operation of the Cable Guard is interrupted during the update process.
Data transmission between the two DATA connections is interrupted during the update.
Do not switch off the device during the update process! Switching off the power supply can destroy
the device.
All settings, the teach-in values and the current measurement of the cable are not changed by the
firmware update.
6.4 Factory Reset
The Cable Guard can be reset to factory settings using the "SET" button when the device is switched on.
When the Cable Guard is reset, the complete configuration and all measurement data are irretrievably
deleted and IP settings are reset to the factory settings. The firmware remains up to date.
To activate a reset to factory settings, disconnect the Cable Guard from the power supply. Now press and
hold the SET button and switch the power supply back on. After 8 seconds, the PWR LED flashes
alternately red/green.
Now release the SET button. The factory reset is now performed, and the Cable Guard then restarts.

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7Technical data
Order number 700-200-LAN01
Name
Ethernet Cable Guard
Scope of delivery
Ethernet Cable Guard with power supply plug
Dimensions (D x W x H)
35 x 48,5 x 75,5 mm
Weight
Approx. 110 g
LAN interface
Number
1
Connection
RJ45
Transmission rate
10/100 Mbit/s, full duplex
Protocols HTTPS web access, MQTT V3.1.1 & V5
DATA Interface
Number 2, IN / OUT („Guard“)
Connection RJ45
Transmission rate 100 Mbits/s (100BaseTX)
Delay 735 ns at 100 Mbit/s
Outputs (Q1 / Q2)
Number 2
Type Q1: Push-Pull (NO) / Q2: Push-Pull (PWM)
Current Max 0,2 A
Protection Overload protection, short-circuit protection
Status indication
Function status
3 LEDs
Ethernet status
6 LEDs
Power supply
Voltage supply
24 V DC (18 … 30 V DC)
Current dray
max. 75 mA at 24 V DC
Power dissipation
Max. 1.9 W
Ambient conditions
Ambient temperature
-40° C bis 65° C
Transport and storage temp. -40° C bis 80° C
Relative air humidity 95% r H without condensation
Protection rating IP20
Pollution degree 2
Mounting position As desired
Approvals CE

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The contents of this Quick Start Guide have been checked by us to ensure that they match the hardware and
software described. However, we assume no liability for any existing differences, as these cannot be fully ruled
out. The information in this Quick Start Guide is, however, updated on a regular basis. When using your
purchased products, please make sure to use the latest version of this Quick Start Guide, which can be viewed
and downloaded on the Internet from www.helmholz.de.
Our products contain open-source software, among others. This software is subject to the respectively relevant license
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Our customers are important to us, we are happy to receive suggestions and ideas for improvement. If you have any questions
regarding the use of the product, please contact Helmholz Support by phone or send an e-mail to [e-mail].
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The representation and naming serve exclusively to explain the use and setting options of the products documented here.