VT825t Remote Monitoring System

Datasheet page: https://vutlan.atlassian.net/wiki/spaces/DEN/pages/2903736321/VT825t

Product page: https://vutlan.com/remote-monitoring-units/182-vt825t-remote-monitoring-system.html

Brochure: https://vutlan.com/index.php?controller=attachment&id_attachment=120

Drivers: https://vutlan.atlassian.net/wiki/spaces/DRIV/pages/2912583997/Latest+Vutlan+drivers+for+T+series+VT325t+VT335t+VT825t+VT855t

Function and purpose

The VT825t / Remote Monitoring System is designed for comprehensive environmental monitoring and I/O control in various industries. Its primary features include:

Environmental Monitoring: Measures critical parameters like temperature, humidity, voltage, leakage, smoke, and airflow. Supports analog, CAN bus, Modbus TCP IP, Modbus RTU (with extension) and other sensors.
I/O Controller: Manages devices such as doors, fans, generators, control panels, UPS systems, circuit breakers, and alarms. You can manage relays, and dry contacts.
Scalability: Supports up to 1000 elements, including notifications, triggers, timers, logic schemes, and sensors.
Built-in Web Interface: Provides a user-friendly interface with virtual sensors, logic schemes, notifications, and control options.
LTE Modem Slot (extension): Ensures connection redundancy with an option for LTE modem integration in case of ethernet failure.

This system is ideal for monitoring and controlling complex environments in data centers, industrial automation, and facility management.

Extensions:

VT740 / LTE slot modem: Ensures connection redundancy with an option for LTE modem integration in case of ethernet failure.
VT485m / Modbus RTU extension or VT485r / OSPDv2 reader extension
VT-BT / Reservation battery charger

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.

Use cases

The VT825t / Remote Monitoring System offers a versatile solution across a range of applications, making it ideal for:

Data Centers: It monitors temperature, humidity, leakage under raised floors, and airflow to ensure optimal conditions for servers and network equipment. It also controls cooling systems and monitors UPS status, providing alerts in case of power failures or temperature spikes.
Industrial Automation: The VT825t can monitor voltage, leakage, and smoke in factories or manufacturing plants while controlling machinery like fans, circuit breakers, or alarms. It ensures the safety and efficiency of automated processes.
Building Management: It acts as an I/O controller to monitor HVAC systems, smoke detectors, and door control systems in office buildings, ensuring proper functioning and security.
Telecommunication Facilities: Used to manage backup power generators, environmental conditions, and network devices, ensuring continuous uptime for telecommunications infrastructure.
Critical Infrastructure: For facilities like power plants or water treatment plants, it monitors environmental factors and controls equipment to prevent system failures, offering notifications and control via its web interface.

Each of these use cases takes advantage of the VT825t's robust features for environmental monitoring, logic-based control, and notifications, ensuring reliable performance in mission-critical environments.

Order options / Dimensions

System	Description
VT825t	x1 230V AC power inlet.
VT825tt	x2 230V AC power inlets, providing a redundant power supply for A&B power distribution.
VT825tDC	x1 230V AC power inlet and x1 24-48V DC power inputs.
VT825DC	x1 24-48V DC power input.
VT825DCDC	x2 24-48V DC power input.

System	Diagram
VT825t
VT825tt
VT825tDC
VT825DC
VT825DCDC

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 DEVICES" - digital connector RJ12 for the connection of CAN sensors/extensions/devices on a CAN bus. Modules 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.

11.3 "CAN" - green LED indicates CAN bus status.

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

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

14. "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.

15. “Battery extension slot” - “VT-BAT / Battery reservation extension” can be installed in this slot. The extension is ordered separately.

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

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

18. "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).

19. "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).

20. "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.

21. “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”.

22. "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)".

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

24. "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.

25. "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

VT825t 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

VT825t has a slot for “VT740 / LTE slot modem”. The modem is ordered separately.

Extension

Photo

VT740

Package content VT825t 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	VT825t	VT825tt	VT825tDC	VT825DC	VT825DCDC
1		Monitoring unit.	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.	4 pcs
13		Terminal plug 2P 3.81 for reserve power input	x1
			VT825t	VT825tt	VT825tDC	VT825DC	VT825DCDC
14		Terminal plug 2 pins, 5.08mm, 2P. For power input 24-48VDC.	-	-	1 pc	1 pc	2 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	-	-	-