Emerson AXIMA 2000, Installation Manual

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48
AXIMA 2000/4000 Installation Manual
Your power supply must be capable of supplying enough current for
the dedicated load requirements. (Enable Drive, Drive Status,
Overtravel L.S.) as well as the input and output load requirements.
Each Input: (# of inputs) * (12 mA)
Each Output: (# of outputs) * (Load Current)
Dedicated Circuits:
Inputs:
CW Limits SW 5 mA
CCW Limit SW 5 mA
Status 5 mA
Output:
Enable Drives 8 mA
For example
Suppose you had four axes of dedicated I/O, four inputs (# 1 through
4), and four outputs (# 1 through 4) with a 150 mA load, and your
power supply was 24 VDC, in the worst case scenario (all inputs and
outputs are being used simultaneously) the current load on the power
supply would be 0.74 amps. This value was found using the following
formula:
(12 mA * 4 IN) + (150 mA * 4 OT) + (8 mA * 4 R) + 4 axis (5 mA * 3 D)
= 0.74 Amps
Where
IN = inputs
OT = outputs
R = relays for Enable Drives
D = dedicated inputs
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