AMD5x Passive Infeed Unit and AMD5x Servo Drive - User Guide
ANCA MOTION
D-000129 Rev 09
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The current demand of the 24 Vdc supply must be sized on the number and types of Drives, types of encoders,
and additional loads such as probes. A conservative estimate is 0.3 A for the PIU and 1 A for each Drive. This is
based on two high current encoders and both Proximity Switches being used.
In practice, a closer estimate can be made based upon the following:
PIU base load: 0.27 A
Each Fan current: 0.27 A (refer
10.5.5 Wall and Recessed Cooling
for number of fans for each product).
Drive base load: 0.27 A (with no Encoders or Proximity Switches connected)
Encoder current: 0.28 A
Example Wall Mount system with: PIU, 35A, 20A, 12A. The 20A drive has two encoders, while all other drives
have one encoder. The 12A drive has one Probe fitted rated 100mA @24 V. See
Table 256
for calculation.
Table 26: Example 24 Vdc supply calculation
AMD5x
Module
Base load
current (A)
Module Fan
current (A)
Encoder
current (A)*
Probe
current (A)
Total module
current (A)
PIU
0.27
0.27
0
0
0.54
35A
0.27
0.81
0.07
0
1.15
20A
0.27
0.54
0.14
0
0.95
12A
0.27
0.27
0.07
0.1
0.71
Total 24 Vdc system current (A):
3.35
*This column shows the reflected current load on the 24VDC supply. This current is
¼
of the actual Encoder
currents, due to the SMPS step-down. The actual Encoder currents are 0.28A per 5V Encoder in this example.
Note a duct mount system will have no fan module current.
The maximum allowed 24 Vdc system current is 10A on the PIU connector X7.
Fan Operation on Wall and Recessed Mount Drives
6.3.1
All Wall and Recesssed mounted Drives have one or more heatsink cooling fans. (refer
for number fans for each product). The fans will perform a power on self test for 10 seconds
after 24 Vdc is applied to the Drive system and upon system connection to the EtherCAT master.
After the 10 seconds start-up sequence has been completed, the fan speed will be based on the Drive or PIU
cooling needs.
Summary of Contents for AMD5x Series
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