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DIRIS Digiware - 542875G - SOCOMEC
EN
8.2.2. Calculation rules for the max. number of devices on the Digiware BUS
The total power consumed by the equipment connected to the Digiware BUS must not exceed the power from the
24 VDC supply.
Power supply must not exceed 20 W.
Size with P15 power supply (ref: 4829 0120) delivering 15 W
For example, it is possible to use
•
1 DIRIS Digiware D-50 (2.5 W) display
•
1 DIRIS Digiware U-xx (0.72 W) voltage module
• 50 metres of cable (1.5 W)
and
•
19 DIRIS Digiware I-3x current modules (19 x 0.52 = 9.88 W)
Total power = 14.6 W
or
•
9 DIRIS Digiware I-4x current modules (9 x 1.125 = 10.125 W)
Total power = 14.845 W
.
Size with a 24 VDC power supply delivering a maximum of 20 W
For example, it is possible to use
•
1 DIRIS Digiware D-50 (2.5 W) display
• 1 DIRIS Digiware U-xx voltage module (0.72 W)
• 50 metres of cable (1.5 W)
and
•
29 DIRIS Digiware current modules I-3x (29 x 0.52 = 15.08 W)
Total power = 19.30 W
or
•
13 DIRIS Digiware current modules I-4x (13 x 1.125 = 14.625)
Total power = 19.345 W
.
For applications using female/female RJ45 connectors to interconnect several enclosures (e.g Busway with tap-off
boxes), the additional power loss of each connector must be take into account in the overall calculation.
Socomec has estimated (but this can vary from one connector to another) that the power loss of an RJ45 female/
female connector averages 0.1 W and represents an additional 3.33m of RJ45 cable length within the Digiware bus.
