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Other names: Rack monitoring and control unit, Monitoring and control unit, Mini monitoring and control unit, I/O module, environmental logging,
Keywords: SNMP monitoring,
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Function and purpose
The unit is used for environmental monitoring (e.g. VT335t Remote Monitoring Unit is a cutting-edge solution designed for comprehensive environmental monitoring and control across various applications. This unit excels in tracking critical parameters, including temperature, humidity, voltage, leakage, smoke, airflow). It is also used and airflow, making it ideal for environments like data centers, industrial facilities, and server rooms.
Key Features:
Environmental Monitoring: The VT335t continuously measures essential environmental factors to ensure optimal conditions, preventing equipment damage and operational failures.
I/O Control Capabilities: It functions as an I/O controller
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, enabling control over doors, fans,
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generators,
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UPS systems, and circuit breakers
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. This ensures efficient management of operational workflows.
Flexible Configuration: Users can manage up to 1,000 different elements, including notifications, triggers, timers, and logic schemes,
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allowing for tailored monitoring solutions that meet specific needs.
User-Friendly Interface: A built-in
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web interface
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provides access to virtual sensors, logic schemes,
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and diverse notification types
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,
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simplifying user interaction and enhancing accessibility.
Remote Connectivity: With a dedicated slot for an LTE modem
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Includes x4 analog sensor ports, x1 Ethernet port, x1 Micro USB port, x1 CAN sensor bus port, x2 12V DC 0.25A relays, x4 dry contact inputs, x1 SD card slot, redundant power supply inputs 12V DC.
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, the VT335t ensures a reliable Ethernet connection, making remote monitoring and management convenient and efficient.
Sensor support
Analog sensors, CAN devices/sensors. Supports Modbus TCP/IP.
Possible extensions:
Accessories:
“VT122t / 19” holder” - supports x1 slot for VT335t & x1 slot for VT408
“VT124 / DIN rail holder” (also named DRP-03)
“VT123 / Wall mounting brackets”
Notifications
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E-mail, FTP log, Syslog, SMTP, SNMP Traps, Web-to-SMS, and PUSH.
Protocols
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DHCP; HTTP; HTTPS; DynDNS; SSL; SNMP v1, v2c, v3; SMTP; FTP; Syslog; RADIUS; Modbus RTU; OpenVPN.
Virtual sensors
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PING, timers, triggers, Logic schemes, SNMP GET, x4 IP cameras, Virtual math elements, and others.
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VT335t is a new model and it replaces VT335i. New features include:
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Use cases
Data Centers: Monitor critical environmental conditions to safeguard sensitive equipment.
Industrial Applications: Control operational equipment and automate responses to environmental changes.
Agricultural Settings: Manage humidity and temperature in greenhouses to optimize crop growth.
Rack / Cabinet manufacturers: Server rack or Electrical cabinet environmental monitoring of parameters adds an additional value when selling racks and adds technological innovation and value to the company.
Physical Description
Front panel:
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Back panel:
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1. "Analog sensors: A1..A4" - x4 RJ12 6P4C analog sensor inputs with auto-sensing. Read instructions at "Analog sensors connection", and "Sensor configuration".
2. "CAN" - digital connector RJ12 6P4C for the connection of CAN sensors/extensions/devices on a CAN bus. Modules can be chained together. Read the instructions in "CAN devises connection", and "Setting up CAN".
"LED: CAN" - green LED indicates CAN bus status.
The LED blinks slowly - nothing is connected
The LED blinks fast - configuration is in process
The LED glows constantly - connected to CAN devices
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"USB" - micro USB-port 2.0 is needed for USB camera recording, USB Flash for system logs, and system restoration. Read instructions at "Connecting USB camera", "USB camera settings. How to save a video", "Saving system logs on USB flash drive", and "USB upgrade or restore of default settings".
"LAN port" - Ethernet 10/100 Base-T port, provides an Ethernet connection. Read more in this section "LAN, GSM, LTE, RADIUS, DNS, SSL, VPN".
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Normal mode: The switch is switched to the left ←. The switch should be always in this position.
Restore of appliance: The switch is switched to the right →. Used to load the clean system image from an SD card. Read instructions at “Restore of appliance (for VT335i, VT825i, VT855i, VT960i & VT960ii series and VT855t series)”
7b. "SD card" - MicroSD card slot with an ejector. The card is needed for data storage or the "system restore". Read instructions at "Saving system logs to SD card", and "Restore of the appliance (for VT960 series)"
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11. "DRY CONTACT INPUTS 1...4" - Digital inputs (Type IN). Pitch 3.5mm, 6P. Read the instructions at "Connecting dry contacts", and "Dry contacts settings".
12. "Modem slot" - "VT740 / LTE slot modem" can be installed in this slot. This modem is ordered separately. Read instructions at "VT740 / LTE slot modem", and "LAN, GSM, LTE, RADIUS, DNS, SSL, VPN".
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15. "DC 12V POWER"- 12V DC 2A main power input.
Connection overview diagram
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Drawing dimensions
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DIN rail installation
“VT124 / DIN rail holder” (also named DRP-03) for mounting on DIN rail. VT124 is ordered separately. The package includes a holder and screws.
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Wall installation
“VT123 / Wall mounting brackets” for mounting onto the wall. The package includes 2 brackets and screws.
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19” 1U installation in a rack-cabinet
“VT122t / 19” holder” for mounting onto a 19” 1U rackmount.
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Installing LTE slot modem
VT335t has a slot for “VT740 / LTE slot modem extension”.
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A modem (point 12 in the picture above) can be installed (purchased separately) inside the system.
Extension | Photo |
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VT740 | .png?version=1&modificationDate=1701079429369&cacheVersion=1&api=v2&width=637) |
Extending the number of sensors and devices connected to the system
Example | Picture | Link |
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1 | .jpg?version=1&modificationDate=1708952454092&cacheVersion=1&api=v2&width=441) | You can connect CAN sensors and devices in a CAN bus chain. Read more at: |
2 | .jpg?version=1&modificationDate=1708952454125&cacheVersion=1&api=v2&width=441)  | VT408 / Analog sensor extenion unit increases a number of connected analog sensors. Each unit adds x8 ports. This is a CAN device. Multiple devices can be connected in a CAN bus chain. See example #1. Read more at: |
3 |  | Increases a number of connected dry contact inputs. Each unit adds x64 or x32 contacts. Read more at: VT440 / Dry contacts unit & VT32 / Dry contacts board extension |
4 | Add sensors and devices. See available devices: |
Inventory - Package content VT335t
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Technical details
See a comparison table with technical details for each individual Vutlan monitoring unit at:
https://vutlan.atlassian.net/wiki/spaces/DEN/pages/705855489
Frequently asked questions
Problem | Cause | Solution |
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The unit is not powering up. | The DIP switch is switched to “R” position. | Switch the DIP switch to “N” position (Normal). |
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