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3-16 Basic Installation MN1919
3.4.8 24V control circuit supply
A 24VDC supply must be provided to power the controlling electronics. This is useful for safety
reasons where AC power needs to be removed from the power stage but the controlling
electronics must remain powered to retain position and I/O information.
A separate fused 24V supply should be provided for the MicroFlex. If other devices are likely
to be powered from the same 24V supply, a filter (Baldor catalog number FI0014A00) should
be installed to isolate the MicroFlex from the rest of the system. Alternatively, a ferrite sleeve
may be attached to the supply cable near connector X2.
Location
Connector X2
Nominal input
voltage
24V
Range 20-30VDC
Input current
Maximum
Typical
1A continuous (4A typical power on surge, limited by NTC)
0.5A - 0.6A (no encoder power)
0.6A - 0.8A (if powering encoder)
T ightening torque for terminal block connections is 0.5-0.6Nm (4.4-5.3 lb-in).
Customer supplied
24VDC (fused)*
GND
24V filter
(optional)
+24V
STAR
POINT
Incoming safety
earth/ground (PE )
* Recommended fus e: Bussman S504 20x5mm anti-surge 2A
** Recommended ferrite s leeve: Fair-Rite part 0431164281 or similar
Use a twisted pair cable, with
ferrite sleeve attached clos e
to connector X2.
Ferrite
sleeve**
Figure 6 - 24V control circuit supply connections
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