VT855ii / Redundant monitoring unit
Monitoring system with redundant power supply
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 elements - notifications, triggers, timers, logic schemes, sensors, and dry contacts. Has a built-in Web interface with virtual sensors, logic schemes, different types of notifications, and control panels. Has a slot for a VT740 LTE Slot modem (ordered separately!) for an ethernet connection reservation.
Order options:
VT855i x1 230V AC power inlet
VT855ii x2 230V AC power inlets
VT855iDC x1 230V AC and x1 24-48V DC power inlets
VT855DC x1 24-48V DC power inlet
VT855DCDC x2 24-48V DC power inlets.ts.
Order options
VT855i | x1 230V AC power inlet. |
VT855ii | x2 230V AC power inlets, providing a redundant power supply for A&B power distribution. |
VT855iDC | x1 230V AC and x1 24-48V DC power inlets. |
VT855DC | x1 24-48V DC power inlet. |
VT855DCDC | x2 24-48V DC power inlets. |


Device Management: | VT855i / VT855ii |
---|---|
Web, SNMP, manually via SMS | ✓ |
Interface | |
LAN: Ethernet 10/100 Mbit | ✓ |
OS: Linux | v.5.40 |
RAM: | 128Mb |
CPU speed: | 600mHz |
Clock: Built-in clock Watchdog: Built-in watchdog timer | ✓ |
Max. amount of sensors: physical sensors, dry contacts, relays | 150 |
Max. amount of elements: notifications, triggers, timers, logic, sensors, dry contacts, SNMP Get, SNMP Trap, and other elements | 1000 |
Protocol support | |
Network protocols: DHCP; HTTP; HTTPS; DynDNS; SSL/TLS; SNMP v1, v2c, v3; SMTP; FTP; Syslog; RADIUS; Modbus RTU; OpenVPN | ✓ |
VPN: secure data communications; secure change of connection between LTE and LAN | ✓ |
SSH: Provided as a separate patch. | ✓ |
Alerts / Notifications | |
Alert types: E-mail, FTP log, Syslog, SMTP, SNMP Traps, SMS (Modem is ordered separately), Web-to-SMS, PUSH | ✓ |
A maximum number of "mail to" recipients in an E-mail notification: | 20 |
A maximum number of "SMS to" recipients in an SMS notification: also the maximum amount of phone numbers | 20 |
Virtual sensors | |
Pings: Built-in function for server pinging. Test the reach-ability of a host in a network. | ✓ |
IP cameras: Connect the IP MJPEG camera with a proxy via the master module. Only view. | 4 |
Get SNMP: Read data from external equipment via SNMP PDU GET (v1/2c) | ✓ |
User keys: Add users who have access using RFID reader. | ✓ |
Logic schemes: Used to specify automatic actions to events that occur in the system. | ✓ |
Timers: Allows you to plan the events in the system. | ✓ |
Triggers: Generate events in the system if logic is triggered. | ✓ |
SNMP traps | ✓ |
Virtual Math element (combine several sensor data and calculate new data) | ✓ |
Logic schemes | ✓ |
Modbus TCP/IP: read/write | ✓ |
Power | |
Note: The system is sold in different order options. The power inputs will depend on your options. | |
Power input AC: | 90-230V |
Power input DC: | 24 ÷ 48V |
Fuse: Fuse at the inlet | 1A |
Max. power consumption: | 30W |
The maximum current load on the relay: | 10А |
Redundant power supply: built-in voltage monitor, voltage range 9-12.6V. Available only for systems with two power supplies. See order options. | Yes, for redundant order options. |
Outputs | |
Relay outputs: latching relays 240V*10A | 2 |
Relays outputs: 12V 0.25A | 2 |
Max. dry contact outputs (contact closures/digital outputs) | 8 |
Inputs | |
Analog port: 6P6C for connection of any analog sensor. | 8 |
CAN port: Max number of sensors Use CAN-12V-1A for connecting more than 12 devices. | 32 |
Dry contact inputs: | 32 |
Modbus: (Max. 32 sensors, Max. line length 1000m) | 1 |
Reader 1-Wire | 1 |
Video | |
Video cameras: | USB, x1 IP |
Other connectors | |
Ethernet port: 10/100Mbit | ✓ |
USB 2.0 Type A | 1 |
USB 2.0 micro | 1 |
External Memory | |
SD card slot | ● |
Extensions (modules are ordered separately) | |
Modem (extensions) | |
4G LTE Slot modem: ordered separately. | VT740 |
Modem modes:
| Gateway / Access / SMS |
Embedded sensors | |
Temperature sensor: +/- 1 °C Case temperature. | ✓ |
Power supply voltage sensor: Accuracy (1%) | 2 |
Environmental characteristics | |
Operating temperature: -10 to 80 °C | ✓ |
Storage temperature: –25 to 85 °C | ✓ |
Operating humidity: 0 to 90 %, non-condensing | ✓ |
Storage humidity: 0 to 95 %, non-condensing | ✓ |
Other Features | |
Installation: | 19” 1U |
Dimensions (L x W x H) in mm: | 440*44*90 |
Weight: | 1,5 kg |
External chassis grounding: M4 thread | ✓ |
Web interface (panels) | |
Dashboard panel: | ✓ |
System tree panel: sensors and devices displayed in a hierarchy | ✓ |
Event log panel: | 300 |
List of latest sent SMS messages: | 200 |
Supported Vutlan environmental sensors | |
Temperature, Outdoor Temperature, Humidity, Water leakage, Wind speed meter, Access sensor, Door sensor, Water Level, AC / DC current meters, AC voltage monitor, Smoke detector, Vibration, Motion / PIR, Converter and etc. | ✓ |

Monitoring system with redundant power supply
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 elements - notifications, triggers, timers, logic schemes, sensors, and dry contacts. Has a built-in Web interface with virtual sensors, logic schemes, different types of notifications, and control panels. Has a slot for a VT740 LTE Slot modem (ordered separately!) for an ethernet connection reservation.
Order options:
VT855i x1 230V AC power inlet
VT855ii x2 230V AC power inlets
VT855iDC x1 230V AC and x1 24-48V DC power inlets
VT855DC x1 24-48V DC power inlet
VT855DCDC x2 24-48V DC power inlets.ts.
related products
4G LTE slot modem for Vutlan monitoring units. Allows to receive and send SMS messages. Provides Ethernet over 4G LTE. Power-cycling is an embedded function. The package includes two LTE antennas.
Can be used together with VT960i & VT960ii.
Monitoring system with redundant power supply
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, 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 a VT740 LTE Slot modem (ordered separately!) for an ethernet connection reservation.
Order options:
VT855i x1 230V AC power inlet
VT855ii x2 230V AC power inlets
VT855iDC x1 230V AC and x1 24-48V DC power inlets
VT855DC x1 24-48V DC power inlet
VT855DCDC x2 24-48V DC power inlets.