VAR4 / VAR12 / VAR20 - Operation Manual
Is
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Note:
If using a VAR12 or 20, in order to optimise response time, it is sensible to distribute them
across the alternative busses.
4. Pressing the SELECT key saves the configuration and displays the sub-menu which allows the user to
configure the Remote I/O unit inputs and outputs, see Section “
16.2
Remote I/O Unit Analogue Input
Configuration
”.
sue: 03 complete, approved
16
ASL BMB01 Remote I/O Expander Configuration
The VAR Router is able to support the connection of up to 9 Remote I/O Expander units (BMB01).
These units extend the control and interfacing capability of the VAR Router by providing:
•
12 analogue inputs
•
12 opto-isolated digital inputs (contacts)
•
12 open collector digital outputs
16.1
Remote I/O Unit RS485 Bus Configuration
The VAR4 provides a single RS485 bus for connection of Remote I/O units. The VAR12 and 20 provide 2
and 3 such busses respectively. The remote I/O units can be connected to any of the RS485 busses.
If using a VAR12 or 20, in order to optimise response time, it is sensible to distribute them across the
alternative busses.
In order to configure a Remote I/O Unit on a RS485 bus proceed as follows.
1. Select
Configuration
Æ
System
Æ
Router
Æ
Control
Æ
Remote
.
2. Move to scroll the Remote I/O unit list until the required unit is displayed:
[Remote I/O unit=n] Not Configured
Default value:
‘Remote
I/O
unit=1’
Possible I/O units: 1 to 3 for VAR4
1 to 6 for VAR12
1 to 9 for VAR20
3. Move to, and scroll the RS485 busses available until the required bus is displayed:
Remote I/O unit=n [Not Configured]
•
Not Configured
Select this option if the Remote I/O unit is not connected.
•
Bus-1
Connects the selected Remote I/O unit to the RS485 bus on the VAR Router base unit (VAR4,
VAR12 and VAR20 units).
•
Bus-2
Connects the selected Remote I/O unit to the RS485 bus on the expand unit 1 (VAR12 and VAR20
units).
•
Bus-3
Connects the selected Remote I/O unit to the RS485 bus on the expand unit 2 (VAR20 units).
Pressing the BACK cancels any changes, and returns to the parent menu.
Содержание VAR12
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