Page Comparison

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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

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

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Function and purpose

“VT825t / Remote 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.

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

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

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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:

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Back panel:

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

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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.

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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.

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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).

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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)".

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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

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Drawing dimensions

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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.