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13. OPTIONS AND AUXILIARY EQUIPMENT
2) GroundingFor grounding, use the wire of the size equal to or greater than that indicated in the followingtable, and make it as short as possible.
Power regeneration common converter Grounding wire size [mm2]
FR-CV-7.5K TO FR-CV-15K 14
FR-CV-22K • FR-CV-30K 22
FR-CV-37K • FR-CV-55K 38
(b) Example of selecting the wire sizesWhen connecting multiple servo amplifiers, always use j unction terminals for wiring the servoamplifier terminals P, N. Also, connect the servo amp lifiers in the order of larger to smallercapacities.
R2/L1
S2/L2
T2/L3
R/L11
S/L21
T/MC1
P/L
N/L
P
N
50mm2
Overall wiring length 5m or less
First unit:
50mm assuming that the total of servo amplifier
capacities is 27.5kW since 15kW + 7kW + 3.5kW
+ 2.0kW = 27.5kW.
P
N
P
N
P
N
22mm2
8mm2
3.5mm2
22mm2
8mm2
5.5mm2
3.5mm2
Junction terminals
Wire as short as possible.
Second unit:
22mm assuming that the total of servo amplifier
capacities is 15kW since 7kW + 3.5kW + 2.0kW =
12.5kW.
Third unit:
8mm assuming that the total of servo amplifier
capacities is 7kW since 3.5kW + 2.0kW = 5.5kW.
Fourth unit:
3.5mm assuming that the total of servo amplifier
capacities is 2kW since 2.0kW = 2.0kW.
FR-CV-55K Servo amplifier (15kW)
Servo amplifier (7kW)
Servo amplifier (3.5kW)
Servo amplifier (2kW)
2
2
2
2
(Note)
(Note)
(Note)
Note. For 7kW or less servo amplifier, always remove the wiring (3.5kW or less: across P-D, 5k 7kW: across P-C) of built-in
regenerative brake resistor.
(4) Other precautions(a) Always use the FR-CVL as the power factor improving reactor. Do not use the FR-BAL or FR-BEL.(b) The inputs/outputs (main circuits) of the FR-CV and servo amplifiers include high-frequencycomponents and may provide electromagnetic wave interference to communication equipment(such as AM radios) used near them. In this case, interference can be reduced by installing theradio noise filter (FR-BIF) or line noise filter (FR-BSF01, FR-BLF).(c) The overall wiring length for connection of the DC power supply between the FR-CV and servoamplifiers should be 5m or less, and th e wiring must be twisted.