GBK60027 DX-SLM Installation Manual Issue 5
Example:
Consider a Power Module connected to an SLM via five other DX Modules using 1
metre cables.
Example of DX Module interconnection
The total resistance of the 0 V return path, between the Power Module and SLM is:
6 X (2 * R
ct
+ R
ca
) = 111 mOhms
This means that the maximum load that the SLM can drive and not exceed the1.0 V
drop requirement is 1 / 0.111 = 9 A.
If, for example, the servo motor and lighting that the SLM is required to drive has a
peak current of 10 A, the interconnection order of the DX modules will have to be
changed to place the SLM closer to the Power Module.
The above example illustrates a fundamental rule of DX Module interconnection: all
DX Modules that connect to high current loads (e.g. actuators / motors and lights)
must be connected as close to the Power Module as possible.
The above example is simplified and does not include current to other DX Modules.
The DX BUS maximum current rating of 12 A is for the entire DX System.
Operation of the SLM at its maximum rating of 30 A peak current is not possible from
the DX BUS supply. To supply greater than the 12 A DX BUS current see section 5.4.4.
DX
Module
DX
Module
DX
Module
DX
Module
DX
Module
Battery
24V
I
SLM
Servo Motor
DX Power Module
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T
