Rockwell Automation Publication 8720MC-RM001K-EN-P - September 2018
59
Connect the 8720MC-RPS Unit
Chapter 5
The wattage [W] is determined by the equation presented on
.
Connect the external precharge resistor to terminals PR1 and PR2 on terminal
block TB2. Leave terminal PR3 open (see
). The
precharge/discharge time (F.014) can require a larger value to accommodate
the increased precharge time. The wattage of precharge/discharge resistor
(F.015) can also be increased to the external precharge resistor wattage.
External Circuit Case
The notes in the following table are referenced from the 8720MC-RPS
precharge/discharge circuit diagrams of the 8720MC-RPS065 units
configured with an external circuit.
Table 19 - 8720MC-RPS Regeneration Mode Diagram Notes
For the 8720MC-RPS065 unit, if the total capacitance is above 110,000 μF,
but less than 220,000 μF, if an external resistor connected as shown in
must be provided.
provides the minimum resistance value for the external
precharge resistor (4.7 ohms for the 8720MC-RPS065 unit). The wattage
[W] is determined by the equation presented earlier.
Figure 30 - 8720MC-RPS065 Precharge/Discharge Circuit with and External Circuit
Note
Information
1
Remove the jumper between PR2 and PR3.
2
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. Wait at least 10 seconds after applying
control power for the contactor power supply to become activated.
3
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
.
4
Use the line reactor in maximum surrounding air temperature of 55 degree C (131 degree F) and below.
380…506V AC
Three-phase Input
L1
L2
L3
L1_AUX
L2_AUX
L3_AUX
PR1
PR2
PR3
MC1
MC2
P
N
G
Circuit Protection
MC
RST
PWR
0V
24V
COM
BDSR
MC
Varistor
Harmonic
Filter
EMC
Line Filter
Single-phase
Line Filter
MC
E
MC
100 to 115 VAC
or
200 to 230 VAC
8720MC-RPS065
Unit
IP
RDY
FR
FR
Line
Reactor
PR1
PR2
PR3
PRX
MC
MC
PRX
DIS
PRX
PWR
DC Output
Circuit Protection
PWR
DIS
DIS
DISR
Remove Jumper
Between PR1 and PR2
Refer to
for note information.
Note 4
Note 2
Note 1