Comparison chart: Master modules (i series) (legacy)
VT335i, VT336, VT825i, VT825ii, VT855i, VT855ii, VT960i, and VT960ii are the monitoring units and can not connect to each other. For scalability please use extension units and embedded boards.
● Built-in □ None ♦ Extension possible ◊ Not extendable
Versions | ||||
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Device Management: Web, SNMP, manually via SMS | Yes | Yes | Yes | Yes |
Sensor access: Three-level by login | Yes | Yes | Yes | Yes |
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Interface | ||||
LAN: Ethernet 10/100 Mbit | Yes | Yes | Yes | Yes |
OS: Linux | v.5.10 | v.5.40 | v.5.40 | v.5.40 |
Interface: Any browser | Yes | Yes | Yes | Yes |
Memory RAM: | 1 Gb | 128 Mb | 128 Mb | 64 Mb |
CPU speed: | 720 MHz | 600 MHz | 600 MHz | 600 MHz |
Total CPU cores: | 4 | 1 | 1 | 1 |
Clock: Built-in clock | Yes | Yes | Yes | Yes |
Timer: Built-in watchdog | Yes | Yes | Yes | Yes |
The maximum amount of sensors: physical sensors, dry contacts, relays | 400 | 150 | 150 | 100 |
The maximum amount of elements: notifications, triggers, timers, logic, sensors, dry contacts, SNMP Get, SNMP Trap, Dial task, and other elements | 2000 | 1000 | 1000 | 700 |
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Networking / Protocol support | ||||
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; | Yes | Yes | Yes | Yes |
Modbus RTU | Yes | Yes | No | No |
RS485 / OSDPv2: reader access control | No | No | No | No |
Modbus TCP / IP | Yes | Yes | Yes | Yes |
Static routing | Yes | Yes | Yes | Yes |
Dynamic DynDNS | Yes | Yes | Yes | Yes |
Access via RADIUS server | 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 |
NTP server | Yes | Yes | Yes | Yes |
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Alerts / Notifications | ||||
Alert types: E-mail, FTP log, Syslog, SMTP, SNMP Traps, SMS (Modem is ordered separately), Web-to-SMS, | Yes | Yes | Yes | Yes |
A maximum number of "mail to" recipients in an E-mail notification: | 50 | 20 | 20 | 20 |
A maximum number of "SMS to" recipients in an SMS notification: also the maximum amount of phone numbers | 50 | 20 | 20 | 20 |
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Virtual sensors | ||||
Pings: Built-in function for server pinging. Test the reachability of a host in a network. | 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 |
Get SNMP: Read data from external equipment via SNMP PDU GET (v1/2c) | Yes | Yes | Yes | Yes |
User keys: Add users who have access using an RFID reader. | Yes | Yes | Yes | No |
Logic schemes: Used to specify automatic actions to events that occur in the system. | Yes | Yes | Yes | Yes |
Timers: Allows you to plan the events in the system. | Yes | Yes | Yes | Yes |
Triggers: Generate events in the system if logic is triggered. | Yes | Yes | Yes | Yes |
SNMP traps | Yes | Yes | Yes | Yes |
Virtual Math element (combine several sensor data and calculate new data) | Yes | Yes | Yes | Yes |
Logic schemes | Yes | Yes | Yes | Yes |
Modbus TCP/IP: read/write | Yes | Yes | Yes | Yes |
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Power | ||||
Power input (230V AC): | x2 inputs option | x2 inputs option | x2 inputs option | No |
Power input (24 ÷ 48V DC): | x2 inputs option | x2 inputs option | x2 inputs option | No |
Power input (12V DC): | No | x1 input option | x1 input option | x2 inputs |
Fuse: Fuse at the inlet | 1 A | 1 A | 1 A | 1 A |
Min. power consumption: |
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Max. power consumption: | 30 W | 10 W | 10 W | 10 W |
The maximum current load on the relay: | 10А | 10А | 10А | 250mА |
Redundant power supply: built-in voltage monitor, voltage range 9-12.6V. | Yes AC/DC DC/DC | Yes AC/DC DC/DC | Yes AC/DC DC/DC | Yes DC 12V |
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Outputs | ||||
Relay outputs: latching relays 240V*10A | 2 | 2 | 2 | - |
Relays outputs: 12V 0.25A | 2 | 2 | 2 | |