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Comparison chart: Master modules

Comparison chart: Master modules

Owned by Vladimir Tayzhev
Last updated: May 22, 2025 by Vasily T.

VT335x, VT336x, VT825x, VT855x, VT960x are the monitoring units and can not connect. For scalability please use extension units and embedded boards.

 

 

 

●  Built-in       □  None       ♦ Extension possible       ◊ Not extendable

 

VT855

VT825t

VT336t

VT335t

VT225t

 

VT855

VT825t

VT336t

VT335t

VT225t

Device Management: Web, SNMP

Yes

Yes

Yes

Yes

Yes

Sensor access: Three-level by login

Yes

Yes

Yes

Yes

Yes

 

Interface

VT855t

VT825t

VT336t

VT335t

VT225t

LAN: Ethernet 10/100 Mbit

100 Mbit

100 Mbit

100 Mbit

100 Mbit

100 Mbit

OS: Linux

v.6.2

v.6.2

v.6.2

v.6.2

v.6.2

Interface: Any browser

Yes

Yes

Yes

Yes

Yes

Memory RAM:

128 Mb

128 Mb

128 Mb

128 Mb

128 Mb

CPU speed:

1 GHz

720 MHz

720 MHz

720 MHz

600 MHz

Total CPU cores:

2

2

2

2

2

Clock: Built-in clock

Yes

Yes

Yes

Yes

Yes

Timer: Built-in watchdog

Yes

Yes

Yes

Yes

Yes

The maximum amount of sensors: physical sensors, dry contacts, relays

150

130

100

100

100

The maximum amount of elements: notifications, triggers, timers, logic, sensors, dry contacts, SNMP Get, SNMP Trap, Dial task, and other elements

1000

1000

700

700

700

 

Networking / Protocol support

VT855t

VT825t

VT336t

VT335t

VT225t

LTE Gateway mode: Internet access (routing for internal network) (modem ordered separately)

Yes

Yes

Yes

Yes

-

LTE Access mode: Internet access over LTE (modem ordered separately)

Yes

Yes

Yes

Yes

-

Network protocols: DHCP; HTTP; HTTPS; SNMP v1, v2c, v3; SMTP; FTP; Syslog; TLS (v1.0, v1.1, v1.2, v1.3)

Yes

Yes

Yes

Yes

Yes

Modbus RTU

Using extension VT485m

Using extension VT485m

Using extension VT485m

Using extension VT485m

-

RS485 / OSDPv2: reader access control

Using extension VT485R

Using extension VT485R

Using extension VT485R

Using extension VT485R

-

Modbus TCP / IP

Yes

Yes

Yes

Yes

Yes

Static routing

Yes

Yes

Yes

Yes

Yes

Dynamic DynDNS

Yes

Yes

Yes

Yes

Yes

Access via RADIUS server

Yes

Yes

Yes

Yes

Yes

VPN: secure data communications; secure change of connection between LTE and LAN

Yes

Yes

Yes

Yes

-

SSL installation

Yes

Yes

Yes

Yes

Yes

NTP server

Yes

Yes

Yes

Yes

Yes

 

Alerts / Notifications

VT855t

VT825t

VT336t

VT335t

VT225t

Alert types: E-mail, FTP log, Syslog, SMTP, SNMP Traps, SMS (Modem is ordered separately), Web-to-SMS,

Yes

Yes

Yes

Yes

Yes

A maximum number of "mail to" recipients in an E-mail notification:

20

20

20

20

20

A maximum number of "SMS to" recipients in an SMS notification: also the maximum amount of phone numbers

20

20

20

20

-

 

Virtual sensors

VT855t

VT825t

VT336t

VT335t

VT225t

Pings: Built-in function for server pinging. Test the reachability of a host in a network.

Yes

Yes

Yes

Yes

Yes

IP cameras: Connect the IP MJPEG camera with a proxy via the master module. Only view, no record.

4

4

4

4

4

Get SNMP: Read data from external equipment via SNMP PDU GET (v1/2c)

Yes

Yes

Yes

Yes

Yes

User keys: Add users who have access using an RFID reader.

Yes

Yes

Yes

Yes

-

Logic schemes: Used to specify automatic actions to events that occur in the system.

Yes

Yes

Yes

Yes

Yes

Timers: Allows you to plan the events in the system.

Yes

Yes

Yes

Yes

Yes

Triggers: Generate events in the system if logic is triggered.

Yes

Yes

Yes

Yes

Yes

SNMP traps

Yes

Yes

Yes

Yes

Yes

Virtual Math element (combine several sensor data and calculate new data)

Yes

Yes

Yes

Yes

Yes

Logic schemes

Yes

Yes

Yes

Yes

Yes

Modbus TCP/IP: read/write

Yes

Yes

Yes

Yes

Yes

 

Power

VT855t

VT825t

VT336t

VT335t

VT225t

Energy efficiency: (EU Energy level)

Grad A

Grad A

Grad A

Grad A

Grad A

Power input (230V AC):

Two inputs option

 Two inputs option

-

-

-

Power input (24 ÷ 48V DC):

Two inputs option

Two inputs option

Yes

Yes

-

Power input (12V DC):

Inpu

Input

Two inputs

Input

Input

Fuse:  Fuse at the inlet

1 A

1 A

PTC

PTC

PTC

Min. power consumption:

1 W

1 W

1 W

1 W

1 W

Max. power consumption:

10 W

10 W

10 W

10 W

6 W

The maximum current load on the relay:

10А

10А

250mА

250mА

250mА

Redundant power supply: built-in voltage monitor, voltage range 9-12.6V.

Yes

AC/DC; DC/DC

Yes

AC/DC; DC/DC

Yes

DC/DC

Yes

DC 12V

-

Reduntant battery

Yes

Yes

 

 

 

 

Outputs

VT855t

VT825t

VT336t

VT335t

VT225t

Relay outputs: latching relays 240V*10A

2

2

 

 

 

Relays outputs: 12V 0.25A

2

2

2

2

2

Max. dry contact outputs (contact closures/digital outputs)

8

 

5

 

 

 

Inputs

VT855t

VT825t

VT336t

VT335t

VT225t

Analog port: 6P6C  for connection of an analog sensor. (extendable using CAN bus)

8 built-in ports, 

extended using extension unit

8 built-in ports, 

extended using extension unit

4 built-in ports, 

extended using extension unit

4 built-in ports, 

extended using extension unit

4 built-in ports, 

extended using extension unit

CAN port: Max number of sensors

Use CAN-12V-1A for connecting more than 12 devices.

x2 port, x32 devices in total

x1 port, max. 32 devices

x1 port, max. 32 devices

 

x1 port, max. 32 devices

x1 port, max. 10 devices

Dry contact inputs: (contact closures/digital inputs)

32

16

8

4

2

Modbus RTU (RS-485): Max. line length 1000m

Using extension VT485m

Using extension VT485m

Using extension VT485m

Using extension VT485m

-

OSDP v2 reader extension:

Using extension VT485R

Using extension VT485R

Using extension VT485R

Using extension VT485R

-

 

Video

VT855t

VT825t

VT336t

VT335t

VT225t

USB cameras

1

1

1

1

1

IP cameras

x4

x4

x4

x4

x4

 

Other connectors

VT855t

VT825t

VT336t

VT335t

VT225t

Ethernet port: 10/100Mbit

1

1

1

1

1

USB 2.0 Type C

1

1

1

1

1

Switch Normal / Recovery: returns the device to factory settings

Yes

Yes

Yes

Yes

Yes

 

External Memory / Logs

VT855t

VT825t

VT336t

VT335t

VT225t

Micro SD memory card slot (SDXC up to 512 Gb)

Yes

Yes

Yes

Yes

Yes