D301087 0308 - BL20 CANopen 6-5
Power Supply
6
Power Supply
Gateway Supply
Module Bus Refreshing
The number of BL20 modules that can be supplied by the gateway
or a separate Bus Refreshing module via the internal module bus
depends on the respective nominal current consumption of the indi-
vidual modules on the module bus.
The following examples show the calculation for the required
number of Bus Refreshing modules:
Example 1:
The BL20 station consists of 20 BL20-1AI-I(0/4...20MA) modules.
The number of additional Bus Refreshing modules required is calcu-
lated as follows:
Note
On a BL20 station including a gateway without integrated power
supply unit, the first module to be mounted after the gateway is a
Bus Refreshing module with either a BL20-P3x-SBB or a BL20-P4x-
SBBC base module with tension clamp or screw connection.
Attention
The sum total of the nominal current consumption of the connected
BL20 modules must not exceed 1.5 A.
Gateway 430 mA
20 BL20-1AI-I(0/4...20MA) 20 x 41 mA 820 mA
Total: 1250 mA
Maximum permissible current via module bus: 1 500 mA
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