VT825 / Remote monitoring unit

MSRP price: €559.00

  End of Life:  31.03.2022

Middle-level unit is used in computer rooms, remote & industrial facilities, offices. Can use up to 100 different elements - notifications, triggers, timers, logic, sensors, dry contacts.

There are built-in servers and agents like HTTP, HTTPS, SNMP v1, 2c, 3, SMTP, Radius, Syslog, FTP, DHCP, Watchdog.  

Sensor ports

Connect sensor by a supplied RJ-11 (6P4C) cable to any sensor port "A1 .. A8". Determination of the sensor type and connection will occur automatically.

Temperature sensor

The temperature sensor is built-in on a board and sticks out on the front panel of the unit for better measurement. Accuracy equals +/- 1°C.

12V outputs

The unit has two 12V 0.25A outputs (electronics relays). E.g. the appliance has the possibility to connect alarm beacons managed by built-in electronic relays.

CAN port

Connecting CAN devices on a common bus allows you to collect data from the sensors with a large area, or from a large distance and to transmit them to the network. VT825 has a LED for CAN bus status indication.

Dry contact inputs

VT825 has 4 dry contact inputs. Can be used together with any contacts, for example with door or window contacts, circuit breakers, etc.

1-wire extension.jpg or

Extension: Modbus or 1-Wire

VT825 has the possibility to install the "VT85 / Modbus extension board" or the "VT10 / 1-Wire board" extension (ordered separately).

1-wire extension.jpg


VT825 has the possibility to install "VT85 / Modbus extension board" or "USB485 / RS-485 to USB adapter" extensions (ordered separately).

Extension: GSM modem

VT825 has the possibility to install GSM or USB modem. VT700 GSM modem is mounted and connected inside of the master unit. It is used for sending SMS notifications and receiving SMS commands.

VT18 extension (for VT825).jpg

Extension: VT18 (ordered separately)

Board is mounted and connected inside of "VT825 / Monitoring unit". Adds 8 dry contacts (IN), 2 loads (latching relays with LEDs indicators on front panel) & a 12V DC power backup terminal. VT825 allows to install either VT18 or VT10, both extensions can not be installed at the same time.

1-wire extension.jpg

Extension: "VT10 / 1-Wire board" (ordered separately)

1-Wire board can be installed inside the monitoring unit to connect access reader or accurate temperature sensors. VT825 allows to install either VT18 or VT10, both extensions can not be installed at the same time.

IP cameras

Using a built-in interface it is possible to add up to four IP cameras. This will allow viewing footage from surveillance cameras remotely,

USB camera

One USB camera (class Linux UVC Webcam which supports MPEG) can be connected to the "USB" port. More USB devices can be connected to one USB port using a USB hub.

USB flash drive

USB flash drive can be connected to VT825 using OTG miniUSB cable and can be used by the system for saving logs. More USB devices can be connected to one USB port using a USB hub.



"ACT" - indicates appliance status, "E1" - indicates 12V "E1" relay status, "E2" - indicates 12V "E2" relay status, "ERROR»" - indicates error and traffic, "CAN" - indicates BUS status.

Chassis earthing

Chassis external ground earthing, to suppress electromagnetic interference.


Ethernet 10/100 Base-T port, provides a network connection.

Inlet 2A.jpg

Power input

The inlet uses a 2A fuse (5x20mm) which can be easily changed.

Data sheet

Product dimensions
Width 440 x Height 44.45 (1U) x Depth 79.4 mm
Packaging weight
1,5 kg
Power input
90-240V, IEC C14
Fuse 2A
Power Consumption
12 Watt
Operating temperature
Temperature : Min. -10° C - Max.+80° C
Chassis grounding (M4 thread)
Recovery switch
Restart button
Mounting possibilities
19" rack mountable
Wall turnable mount (with extension)
Max. distance from the unit
300 m
Manufactured in (country)
Manufactured in Slovak Republic, E.U.
HS Code
8471 50 000
Package includes
19" mounting brackets 2pcs
Cable EU Schuko C13 0.5mm2 230V 10A
Patch cable RJ45 3m
Screws 6pcs M3 8mm
Self-adhesive rubber foot 4 pcs
Short description and connection guide
Terminal plug 3 pins 3.81mm 1pcs
Terminal plug 6 pins 3.5 mm 1pcs
Warranty card
Brackets (accessories)
VT101 / Battery holder (for VT825, VT825DC) (ordered separately)
VT112 / Rotatable mounting brackets (ordered separately)
Inputs terminals
Analog sensor ports: x8 ports
CAN bus sensor port
Dry contacts / Digital inputs: 4 contacts (pitch 3,5mm, type IN)
Expansions (ordered separately) *
"VT10 / 1-Wire Board" or "VT18 / Extension board"
VT700 / GSM modem
Processor *
ARM926-300 MHz / 64 MB / Linux-2.6.38
Network Interface *
1-Wire (with extension)
CAN bus
Ethernet 10/100 Mbit/s
Built-in sensors *
Power supply voltage sensor (1%)
Temperature sensor (Accuracy 1%)
Outputs terminals
SD card slot
Two 12V 0,25A outputs (pitch 3,81mm, 3P)
USB port for saving logs (USB flash)
Status Indicators *
Error LED
LED indication for CAN bus connection
LED indication for Power / Network connectivity
Two relay status LEDs

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VT825 Brochure EN

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