Guidelines for Station Planning
D301087 0308 - BL20 CANopen6-6
The calculation shows that no further Bus Refreshing module is
required.
Example 2:
The BL20 station comprises 15 BL20-1AI-U(-10/0...+10VDC)
modules, 10 BL20-2AO-U(-10/0...+10VDC) modules,
10 BL20-2DI-24VDC-P modules and 5 BL20-2DO-24VDC-0.5A-P
modules.
The required number of Bus Refreshing modules is calculated as
follows:
The calculation shows that an additional/further Bus Refreshing
module is required at the latest following the last BL20-2AO module.
This Bus Refreshing module is sufficient to supply the remaining
modules.
Gateway 430 mA
15 BL20-1AI-U(-10/0...+10VDC) 15 x 41 mA 615 mA
10 BL20-2AO-U(-10/
0...+10VDC)
10 x 43 mA 430 mA
10 BL20-2DI-24VDC-P 10 x 28 mA 280 mA
5 BL20-2DO-24VDC-0.5A-P 5 x 32 mA 160 mA
Total: 1 915 mA
Maximum permissible current via module bus: 1 500 mA
Note
The power requirements of the BL20 gateway is to be considered
when calculating the required number of Bus Refreshing modules.
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