Release date: 06 April 2020

End-of-Sale date: 16 May 2024

End-of-Support date: 16 May 2027

Documentation page: https://vutlan.atlassian.net/wiki/spaces/DEN/pages/2604007425/VT855i+VT855ii+Data+Center+Monitoring+Unit

Product page: https://vutlan.com/remote-monitoring-units/160-vt855i-data-center-monitoring-unit.html

Drivers: Latest Vutlan drivers for VT855i series (VT335i, VT825i, VT855i)

Function and purpose

The unit is used for environmental monitoring (e.g. temperature, humidity, voltage, leakage, smoke, airflow). It is also used as an I/O controller (e.g. door control, fans, generator, control panels, UPS, circuit breakers, and alarms). Can use up to 1000 different elements - notifications, triggers, timers, logic schemes, sensors, dry contacts. Has a built-in Web interface with virtual sensors, logic schemes, different types of notifications, and control panels. Has a slot for an LTE modem for an ethernet connection reservation.

Order options / Dimensions

System	Diagram
VT855i
VT855ii
VT855iDC
VT855DC
VT855DCDC

Physical Description

The front panel for VT855i & VT855ii:

VT855i back panel:

VT855ii back panel:

VT855DCDC back panel:

1. "1U 19-inch brackets" - x2 pcs for mounting brackets into a 1U 19" rack slot.

2. "Logo sticker" - Displays the article number of the monitoring unit.

3. "Sticker space" - A place for a sticker, can be used by a user to place an identifier of the system (for example, an IP address).

4. "Analog sensors: A1..A8" - 8 RJ12 analog sensor inputs with auto-sensing. Read instructions at "Analog sensors connection", and "Sensor configuration".

5. "LAN port" - Ethernet 10/100 Base-T port, provides an Ethernet connection. Read more in this section "LAN, GSM, LTE, RADIUS, DNS, SSL, VPN".

• "Orange LED" - orange LED for Ethernet port. It shows network traffic.

• "Green LED" - green LED for Ethernet port. It shows network traffic. Flashes green when the system starts up. Shows the connection state (constant green light - the connection is established, blinking green - the connection attempt).

6. "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".

7. USB ports are needed for USB camera recording, USB Flash for system logs, and system restoration. Read instructions in "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".

• a. "USB 0" - type micro USB-port 2.0, required to connect a USB camera.

• b. "USB 1" - type USB-port 2.0, required to connect a USB camera or a USB Flash card.

8. "SD card" - MicroSD card slot with an ejector. The card is needed for data storage or the "system restore". Read the instructions at "Saving system logs to SD card", and "Restore the appliance (for VT960 series)".

9a. "CAN DEVICES" - digital connector RJ12 for the connection of CAN sensors/extensions/devices on a CAN bus. Modules can be chained together. Read the instructions in "CAN devices 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

10ab. Modbus port for Modbus RTU devices/meters/sensors with reading/write functionality. Read instructions in "Connecting Modbus RTU sensors to VT336 & VT336PoE", and "Configuring Modbus devices".

• LED: "LED: TX" - Modbus data sent activity (Transmission).

• LED: "LED: RX" - Modbus data received activity (Receiving).

• "MODBUS" - port for connecting Modbus RTU / RS-485 sensors and devices.

11. "TEMPERATURE SENSOR" - Accuracy +/- 1 °C.

12. "LED: ACT" - green LED indicates appliance system status,

• - operating mode of the device: switches at a frequency of 2 times per second;

• - successful completion of the software update process: switches at a frequency of 4 times per second;

    "LED: ALARM" - The button can be programmed from the interface for alarm indication.

    "LED: ERR" - red LED indicates error and traffic.

• the operating mode of the device: If everything is normal, the LED is extinguished, if not - there's a constant glow;

•  software update mode: switches at a rate of 2 times per second;

13. "Dip switch" 

• 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 “https://vutlan.atlassian.net/wiki/spaces/DEN/pages/2417491974”.

14a. "OUTPUTS 12V 0.25A" - 12V 0.25A (for each output) terminals outputs (electronic relay). Read the instructions at "Connecting 12V devices to 12V outputs".

• "LEDs: E1, E2" - status indicators for two 12V 0.25A outputs.

• The LED is ON (orange) - the output is ON (the initial state can be configured).

• The LED is OFF (orange) - the output is OFF ((the initial state can be configured).

15. "Relays 1, Relay 2" - NC / NO power relay terminals. Read instructions at "Connecting NC/NO relays", "A relay switching (NC NO)", and "Relays (Outlets) (SNMP)".

• "LEDs: R1, R2" - status indicators for x2 relays at the back of the unit.

• The LED is ON (orange) - the relay is ON (the initial state can be configured).

• The LED is OFF (orange) - the output is OFF ((the initial state can be configured).

16. "DRY CONTACT INPUTS 1...32" - Digital inputs (Type IN). Read the instructions at "Connecting dry contacts", and "Dry contacts settings".

17. "ISOLATED DRY CONTACTS OUTPUTS 1...8" - Digital outputs 24VDC / 15mA (type OUT). Read the instructions at "Connecting dry contacts", and "Dry contacts settings".

18/19. Please refer to the section "Order options" in this document.

• 18. "RESERVE" - Reserve power inlet. 100-240VAC, 50/60Hz, Fuse 2A, Fuse 5x20mm, type C14.

• 19. "MAIN" - Power inlet. 100-240VAC, 50/60Hz, Fuse 2A, Fuse 5x20mm, type C14.

20. Buttons

• 20a. "Restart" - the button restarts the appliance. Hold the button for 2 seconds and then let go, and the system will restart.

• 20b. "Reset settings" - reset settings to default factory settings. Keep pressing the button for more than 5 seconds. The “ERR” LED will start blinking. This indicates that the factory restoration has started. Wait for 20-60 seconds for the system to restart. The “ACT” LED will start blinking once the system has been restarted. The device can be accessed now.

• 20c. "Factory reset" - Do not use this button.

21. "1-WIRE READER" - For connecting RFID reader or 1-Wire sensors. A serial communication protocol that uses a single data line plus ground reference between master and 1-Wire slave devices. Read instructions at "Connecting 1-Wire devices", "Access control", and "Setting up 1-Wire".

22. "DC 12V BACKUP POWER" - optional order option. Only available for custom orders.

23. "Chassis grounding" - Chassis grounding, M4 thread. Enhances the immunity of the equipment against conducted and radiated RF disturbances. Please contact a professional electrician before connecting it.

24. "POWER 24-48V DC" - optional order option for some of the units. Please refer to the section "Order options" in this document.

• 24a. "RESERVE" - Reserve power inlet. 24-48V DC, 5.08mm 2EDGK power plug, 18-72VDC to 12VDC/0.84A

• 24b. "MAIN" - Power inlet. 24-48V DC, 5.08mm 2EDGK power plug, 18-72VDC to 12VDC/0.84A

Connection overview diagram

The front panel of VT855i & VT855ii:

The back panel of VT855ii:

Drawing dimensions

Installing the device into a 19" rack

Use x3 pcs of supplied screws (M3 6mm) for each bracket to fix it on each side of the enclosure as shown in the picture below. The screws and brackets are supplied with the unit.

Installing a backup battery

It is possible to attach a backup battery holder for a battery at the back of the system.

VT101i product page: https://vutlan.com/mounting-brackets-holders/170-vt101i-battery-holder.html

CL-18650-29E/3S1P: https://www.tme.eu/sk/details/cl-18650-29e_3s1p/akumulatory/cellevia-batteries/

Installing LTE slot modem

Inventory

Technical details

Copyright:

Vutlan s.r.o. (LLC)

Remote Infrastructure Monitoring and Control

43 ul.Svornosti, 821 06 Bratislava,

Slovak Republic

www.vutlan.com