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Rockwell Automation Publication 8720MC-RM001K-EN-P - September 2018
Chapter 5
Connect the 8720MC-RPS Unit
Table 17 - 8720MC-RPS Regeneration Mode Diagram Notes
Figure 28 - 8720MC-RPS065 (regenerative mode only) Input Power Wiring
Note
Information
1
The three-phase AC input power to terminals L1, L2, and L3 must branch off to control power terminals L1AUX, L2AUX, and L3AUX respectively. In parallel configurations,
the control power phases L1AUX, L2AUX, and L3AUX for the master unit must branch off to terminals L1AUX, L2AUX, and L3AUX of the follower units respectively.
2
We recommend that you install the DC-bus circuit protection on both lines connected to terminals P and N to help prevent ground faults when more than one servo drive
is connected to the 8720MC-RPS unit.
3
Turn ON switches SW7-1 and SW7-2 on the Regulator Board.
4
Route wires and cables in the cabinet as short as possible.
5
Make the ground connection from the harmonic filter (terminal E) to ground terminal (G) as short as possible.
6
This connection diagram is only available for AC input drives.
7
The physical order of the harmonic filter and varistor relative to the contactor and line reactor in the AC input power line must be installed as shown.
8
Use the line reactor in maximum surrounding air temperature of 55 degree C (131 degree F) and below.
9
Driving current of the sequence input signals is ≤5 mA. So, make sure to use a contact with a minimum applicable load of ≤5 mA.
10
When the fan is connected to an external power supply, make sure that the power supply is designated by NEC Class 2 (power supply limited to ≤100 VA and ≤8 A in the
event of a failure). For fan wiring inside the line reactor, see the figure (lower left) and
on
.
380…506V AC
Three-phase Input
L1 (R)
L2 (S)
L3 (T)
L1_AUX
L2_AUX
L3_AUX
PR1
PR2
PR3
MC1
MC2
P
N
G
Circuit Protection
CB1
MC
RST
PWR
0V
24V
COM
BDSR
MCI
Varistor
Harmonic
Filter
MC1
E
Main Magnetic
Contactor (MC1)
100 to 115 VAC
or
200 to 230 VAC
Run On/Off
8720MC-RPS065 Unit
Regenerative Mode
Termina Block for
Control Power (TB2)
IP
RDY
FR
FR
Line
Reactor
L1
L2
L3
EMC
Line Filter
Circuit Protection
CB2
Inverter
(load equipment)
Line
Reactor
To AC Motor
READY
U
V
W
P
N
G
Circuit Protection
READY
TB3
TB2
TB1
TB1
Single-phase
Line Filter
Note 4
for note information.
Note 8
Note 2
Note 4
Note 5, 7
Note 8
Note 9
Note 1
Note 2
Note 3, 6