Teknic EF-785, Руководство по установке

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30
V
E R S I O N
1 . 4 2 / A
U G U S T
2 6 , 2 0 0 5
S
TEP
5: S
ET UP
DC M
OTOR
P
OWER
D
ISTRIBUTION
48-90VDC
The eF-785 simplifies power distribution to DC powered motor drives.
Connector P6, on the rear panel of the eF-785, provides switched Main
AC power to the DC power supply, and connects the DC output of the
supply back to the eF-785. Though we often refer to this as the “75VDC
Power Distribution” in the manual, the permissible voltage range for this
supply is 48-90VDC.
115V
J
A
Host Power J
B
Host Power
P3
Main
AC Motor Power
Load
AC Motor Power
J4
S
A
F1, F2 Host Pwr. 8A Max
P12
Safety Harness
Hazardous
AC Out
J2
P14 P13
Safety Control Ext.
DC Motor Supply
48-90VDC
24VDC
Supplies
J5
P6
USB
P15
P16
Main DC Motor Pwr.
90VDC Max.
P7A P7B
P18
40V
100-125/200-240 VAC~ 20A, 50-60Hz
P9 A,B
24VDC
Ckt. 1
P10 A,B
24VDC
Ckt. 2
J8A J8B
Option DC Motor Pwr.
90VDC Max.
P11 A,B
24VDC
Ckt. 3
Net Out Net In
RED BLK
P2
IEEE-1284 Host Port
J17
48-90VDC POWER
SUPPLY CONNECTOR (P6)
48-90VDC OUTPUTS
(P7A,B J8A,B)
48-90VDC Power Distribution Connectors
S
ELECTING THE
P
OWER
S
UPPLIES
For most applications, Teknic recommends a bulk linear power supply
with a large capacitive output filter (to accept regenerated power from
the motor drives). Also, since servo and stepper motor drives have high
peak current demands, the supply should support a high peak current
rating above the continuous RMS rating. Teknic manufactures a bulk DC
supply of this type (part number SSt-EMF75). The SSt-EMF75 is a bulk
DC power supply featuring a large (47,000 µF) output capacitor bank
that also offers a resistive power clamp for regenerated drive power. A
cable for connecting this supply is shown in Appendix C. If you are using
non-Teknic drives, contact the drive manufacturer for guidance on power
supply selection.
Use switching power supplies only if their outputs are paralleled with
a large capacitor and the supply is oversized to handle the peak current
demands. Note:
this is typically not an economical choice.
C
ONNECTING
DC M
OTOR
P
OWER
S
UPPLIES
(P6)
W
IRING THE POWER SUPPLY
Since the DC Motor Supply connector, P6, not only provides switched AC
power out to the power supply, but also receives the DC power back into
the eF-785, wiring between the power supply and the eF-785 can be
accomplished by using a point-to-point harness. AC wiring to any
connected DC motor power supply should be fabricated with 14AWG
wire with a temperature rating of 90 degrees C or greater, and all the
wiring should be rated for 300 v to maintain proper isolation. 12AWG or
larger wire can also be used if it has insulation rated at or above 70
degrees C.