VT855t / Data Center Monitoring System

Datasheet page: https://vutlan.atlassian.net/wiki/spaces/DEN/pages/2903769089

Product page: https://vutlan.com/remote-monitoring-units/185-vt855t-remote-monitoring-system.html

Brochure: https://vutlan.com/index.php?controller=attachment&id_attachment=122

Drivers: https://vutlan.atlassian.net/wiki/spaces/DRIV/pages/2912583997

Date of release: 15.05.2023

Keywords: Remote monitoring system, SNMP monitoring device, Master monitoring unit, I/O controller, temperature monitoring, water leakage, remote environment, environment monitoring, IoT monitoring unit, remote environment monitoring, stand-alone monitoring, smoke detector, relay contacts, data center optimization, Server room monitoring, data center safety, data center optimization, remote power switch, server room environment,

Function and purpose

“VT855t / Data Center Monitoring System” 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.

Includes x8 analog sensor ports, x1 Ethernet port, x1 Micro USB port, x1 CAN sensor bus port, x2 NC/NO/COM relays, x2 12V DC 0.25A relays, x32 dry contact inputs, x8 dry contact outputs, x1 SD card slot, power reservation option for AC and DC, LTE extension slot, Modbus RTU or OSDPv2 reader extension slot.

Supports a full range of Vutlan analog sensors and CAN devices/sensors. Supports Modbus TCP/IP.

Possible extensions:

Notifications include E-mail, FTP log, Syslog, SMTP, SNMP Traps, Web-to-SMS, and PUSH.

Protocols include DHCP; HTTP; HTTPS; DynDNS; SSL; SNMP v1, v2c, v3; SMTP; FTP; Syslog; RADIUS; Modbus RTU; OpenVPN.

Virtual sensors include PING, timers, triggers, Logic schemes, SNMP GET, x4 IP cameras, Virtual math elements, and others.

Order options / Dimensions

System	Description
VT855t	x1 230V AC power inlet.
VT855tt	x2 230V AC power inlets, providing a redundant power supply for A&B power distribution.
VT855tDC	x1 230V AC power inlet and x1 24-48V DC power inputs.
VT855DC	x1 24-48V DC power input.
VT855DCDC	x2 24-48V DC power input.

System	Diagram
VT855t
VT855tt
VT855tDC
VT855DC
VT855DCDC

Physical Description

Front panel:

Back panel:

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

2. "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).

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

4. "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).

5. "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".

6. "CAN 1 / CAN 0" - x2 RJ12 ports for the connection of CAN sensors/extensions/devices on a CAN bus. Modules connected to these connectors can be chained together. Read the instructions at "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

7. “USB” - Micro USB ports is 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".

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

9.1 "Activity" - 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;

9.2 "Error" - 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;

9.3 "Alarm" - The LED can be programmed from the interface for alarm indication.

10. "TEMPERATURE SENSOR" - accuracy +/- 1 °C.

11.1 "E1, E2" - LED status indicators for 12V 0.25A Relay Outputs.

11.2 "R1, R2" - LED status indicators for x2 NC/NO/COM relays.

12. "DRY CONTACT INPUTS 1...32" - Dry contact input terminals (Type IN). Read the instructions at "Connecting dry contacts", and "Dry contacts settings".

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

14. “Battery Extension Slot” - Extension slot for “VT-ACCU / Rechargeable reservation battery” or “VT-6F22 / Reservation battery 9V”. Only one extension can be installed into this slot. Each extension is purchased separately.

15. "RESERVE" - Reserve power inlet. 100-240VAC, 50/60Hz, Fuse 2A, Fuse 5x20mm, type C14. Please refer to the section "Order options" in this document.

16. "MAIN" - Power inlet. 100-240VAC, 50/60Hz, Fuse 2A, Fuse 5x20mm, type C14. Please refer to the section "Order options" in this document.

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

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).

18. "OUTPUTS 12V 0.25A" - 12V 0.25A (for each output) terminals outputs (electronic relay). LED indicators are located on the front panel. Read the instructions at "Connecting 12V devices to 12V 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).

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

20. “N - R" - DIP switch is used for different system modes.

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 the instructions at “Restore of appliance”.

21. "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)".

22. “Extension slot” - Only one of the two extensions can be installed “VT485m / Modbus RTU extension” or “VT485r / OSDP v2 reader extension”. Ordered separately.

23. "DC 12V BACKUP POWER" - This is a third backup option. The PCB has three power lines.

24. "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.

25. "RESERVE INPUT 24-48V" - Reserve power inlet. 24-48V DC, 5.08mm 2EDGK power plug, 18-72VDC to 12VDC/0.84A. Please refer to the section "Order options" in this document.

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

Connection overview diagram

Drawing dimensions

19” 1U installation in a rack-cabinet

1.1		x2 19” brackets should be located in the package together with the system. Use x3 M3 screws to mount the brackets on each side of the unit.
1.2
2		Use x4 captive nuts and x4 M6 Screws to attached the unit to the rack.

Installing VT485m / RTU modem extension slot

VT855t has a slot for an extension. You can install only one module in this slot. You can install the “VT485m / Modbus RTU modem extension slot” or the “VT485r / OSDPv2 reader extension slot”. Both modules are ordered separately.

Extension	Photo with the module installed
VT485r
VT485m

Installing LTE slot modem

VT855t has a slot for “VT740 / LTE slot modem”. The modem is ordered separately.

Extension

Photo

VT740

Installing reservation battery

The unit has an “Extension battery slot” at the back of the unit. You can install VT-BAT / Reservation battery 6F22 9V or VT-ACCU / Rechargeable reservation battery.

Extending the number of sensors and devices connected to the system

Example	Picture	Link
1		You can connect CAN sensors and devices in a CAN bus chain. Read more at: CAN devices connection Setting up CAN
2		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: VT408 / Analog sensor extension unit
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: Sensors and meters www.vutlan.com

Package content VT855t series

Make sure that the contents of the delivery meet the following configuration. Report a missing or damaged component to your supplier. If damage occurred during transportation, contact the appropriate delivery service.

	Package content	Description	Quantity
	Package content	Description	VT855t	VT855tt	VT855tDC	VT855DC	VT855DCDC
1		Monitoring unit VT855.	1 pc
2		OTG Micro USB cable adapter	1 pc
3		RJ-45 3m patch cable. For LAN Ethernet connection.	1 pc
4		Self-adhesive rubber foot	4 pcs
5		19" rack brackets	2 pcs
6		M3 x 8mm Phillips flat-head screws	6 pcs
7		Configuration manual	1 pc
8		Warranty card	1 pc
9		Terminal plug 6 pins, 5.08mm, 6P. For NC NO COM relays.	1 pc
10		Terminal plug 3 pins, 3.81 mm. For 12V relays (E1 & E2).	1 pcs
11		Terminal plug 6 pins, 3.5 mm. For connecting dry contact inputs.	8 pcs
12		Terminal plug 8 pins, 3.5 mm. For connecting dry contact outputs.	2 pcs
13		Terminal plug 2 pins, 5.08mm, 2P. For power input 24-48VDC.	-	-	1 pc	1 pc	2 pc
14		Terminal plug 3.81mm, 2P. For reserve power input 12VDC.	1 pc	1 pc	1 pc	1 pc	1 pc
15		EU Schuko C13 0.75 мм². 230V 10A cable.	1 pc	2 pc	1 pc	-	-
16		IEC C13/C14 230V 10A	-	2 pc	-	-	-