1a. “1-WIRE” - Used when “VT10 / 1-Wire module” (extension board ordered separately) is installed in-
side. Serial communication protocol that uses a single data line plus ground reference between master
(VT825/ Monitoring unit) and 1-Wire slave device.
1b. “1-WIRE STATUS” - If the green light is “ON”, then 1-Wire module is on. There’s an element inside moni-
toring unit’s interface that can be switched “ON” and “OFF”, which activates 1-Wire bus.
2. “CAN” - digital connector RJ12 for the connection of CAN sensors and CAN extensions on a CAN bus,
with auto-sensing.
3. “SD” - SD, MicroSD card connector with ejector, needed to store data.
4. “GSM ANTENNA” - connector, used when GSM modem is installed inside of the appliance to connect
GSM antenna. (GSM modem is ordered separately).
5a. “GSM Status” - indicates GSM SIM card status. Blinking = working.
5b. “SIM” - connector with an ejector, used when modem is installed inside of the appliance.
6a. LEDs: “Relais 1, 2” - indicates power relais status.
6b. “DRY CONTACTS 5...12” - Dry contacts terminal (type IN)
6c. “Relais 1, 2” - relays power terminals.
6d. “DC 12V” - power backup terminal.
7a. LEDs: “ACT” - indicates appliance status, “E1” - indicates 12V E1 relay status, “E2” - indicates 12V E2 relay
status, “ERROR»” - indicates error and traffic.
7b. LED: “CAN” - indicates CAN bus stutus.
8. “LAN” - Ethernet 10/100 Base-T port, provides Ethernet connection.
9. “HS USB” - type miniAB USB-port 2.0, required to connect a USB camera or to restore an appliance.
10. “RESTART” or “RESET” - restarts the appliance.
11. “A1..A8” - 8 RJ12 analog sensor inputs with auto-sensing.
12. “DIP SWITCH”
13. “TEMPERATURE SENSOR” - ac/- 1 °C.
14. “DRY CONTACTS 1...4” - Dry contacts terminal (type IN)
15. “OUTPUT 12V 0.25A” - 12V 0.25A output electronic relay teminal
16. “CHASSIS GROUNDING” - External chassis grounding, M4 thread.
15. “Power input” - 230V 2A C14 input.
16. “Fuse” - 2A 5*20 mm fuse.
Connections of your “VT825 / Monitoring unit”
