...
3. "TR" - is the nearest switch to CAN inputs. This switch should be turned "ON" on the last sensor in the CAN chain. The last sensor in the long - chain with a length of more than 10 meters, the terminator should be in "OFF" position.
"FR" - the memory switch, is necessary for reprogramming the module (the switch remote from the CAN connectors).
| Note |
|---|
Do not use the DIP switch "FR" labeled "1", it should always be OFF. If this switched switch is turned ON, the module will turn off. This switch is only needed for programming purposes |
...
ERROR is lit continuously, RUN blinks - the unit has no connection with the monitoring unit.
ERROR is continuously lit, RUN repaid - extension unit communicates with a monitoring unit, however, but it is not included in the monitoring system (not configured).
ERROR repaid, RUN lights up continuously - the extension unit is included in the work as part of a monitoring system.
...
| Include Page | ||||
|---|---|---|---|---|
|
Function
VT408 module is developed to expand the number of analog sensors connected to the monitoring system. The picture below illustrates the expansion example:
...
There are mounting holes on the bottom of the unit. x2 central holes on the bottom for a DIN rail extension for DIN rail mounting. x4 holes on the sides on the bottom for wall mount brackets VT123 (ordered separately!) . It is also possible to mount a unit standard 19" side brackets VT125 (ordered separately!).
.jpg?version=1&modificationDate=1535716169649&cacheVersion=1&api=v2&height=250)
.jpg?version=1&modificationDate=1535716255405&cacheVersion=1&api=v2&width=500)
DIN rail extension , and wall brackets are purchased separately.
...
Connect CAN input of the unit by RJ11/RJ12 cable supplied to the CAN input of the previous CAN unit or monitoring system. The red LED lights up. Match the TR bus terminators on the attached CAN units. CAN bus terminators TR (position 2 in VT450) should be in the ON state only at the end CAN units port and in Off states (1,2) for all intermediate units. One CAN bus can have not more than 8 CAN units, sensors, and/or another CAN device.
Normally 12V 0.5A external power supply is connected to the jack labeled PWR (point 2 in the general scheme). But if the only VT408 unit is connected and the length of the cable from the monitoring unit to the VT408 does not exceed 10m allowed the extension unit operation without any external power supply. In all other cases, the use of an external power supply is desirable.
Configuration
To connect the CAN unit to the system, open the interface and go 
Click "Configure" and wait. The system starts the CAN bus line survey , and displays the list of connected CAN units and sensors. On the CAN devices, the green LEDs light up.
...
If the survey is reset after click clicking "Configure", it means that the line is not connected (bad cable and/or bad connectors) or not matched terminators on the bus. It is necessary to check and change the status of the line or the TR terminations.
...