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Connection of stand-alone option unit
It is recommended to configure a sequence, which shuts off power in the input side of the inverter by the external thermal
relay as shown below, to prevent overheat and burnout of the brake resistor (MRS type, MYS type) and high duty brake
resistor (FR-ABR) in case the regenerative brake transistor is damaged. (The brake resistor cannot be connected to the
0.1K and 0.2K.)
∗3 Refer to the table below for the type number of each capacity of thermal relay and the diagram below for the connection.
(Always install a thermal relay when using a brake resistor whose capacity is 11K or higher)
∗4 When the power supply is 400V class, install a step-down transformer.
Power
Supply
Voltage
Brake Resistor
Thermal Relay Type
(Mitsubishi product)
Contact Rating
200V
MRS120W200 TH-N20CXHZ-0.7A
110VAC 5A,
220VAC 2A(AC11 class)
110VDC 0.5A,
220VDC 0.25A(DC11class)
MRS120W100 TH-N20CXHZ-1.3A
MRS120W60 TH-N20CXHZ-2.1A
MRS120W40 TH-N20CXHZ-3.6A
MYS220W50 (two units in
parallel)
TH-N20CXHZ-5A
Power
Supply
Voltage
High-duty
Brake Resistor
Thermal Relay Type
(Mitsubishi product)
Contact Rating
200V
FR-ABR-0.4K TH-N20CXHZ-0.7A
110VAC 5A,
220VAC 2A(AC11 class)
110VDC 0.5A,
220VDC 0.25A(DC11 class)
FR-ABR-0.75K TH-N20CXHZ-1.3A
FR-ABR-2.2K TH-N20CXHZ-2.1A
FR-ABR-3.7K TH-N20CXHZ-3.6A
FR-ABR-5.5K TH-N20CXHZ-5A
FR-ABR-7.5K TH-N20CXHZ-6.6A
FR-ABR-11K TH-N20CXHZ-11A
FR-ABR-15K TH-N20CXHZ-11A
400V
FR-ABR-H0.4K TH-N20CXHZ-0.24A
FR-ABR-H0.75K TH-N20CXHZ-0.35A
FR-ABR-H1.5K TH-N20CXHZ-0.9A
FR-ABR-H2.2K TH-N20CXHZ-1.3A
FR-ABR-H3.7K TH-N20CXHZ-2.1A
FR-ABR-H5.5K TH-N20CXHZ-2.5A
FR-ABR-H7.5K TH-N20CXHZ-3.6A
FR-ABR-H11K TH-N20CXHZ-6.6A
FR-ABR-H15K TH-N20CXHZ-6.6A
NOTE
The brake resistor connected should only be the dedicated brake resistor.
Brake resistor cannot be used with the brake unit, etc.
Do not use the brake resistor (MRS type, MYS type) with a lead wire extended.
Do not connect a resistor directly to the terminals P/+ and N/-. This could cause a fire.
MC
Inverter
MC
R
PR
P/+
S/L2
T/L3
R/L1
ON
OFF
OCR
Contact
Power supply
F
High-duty brake
resistor (FR-ABR)
Thermal relay
(OCR) (∗1)
T∗2
MC
To the inverter
terminal P/+
To a resisto
r
TH-N20
1/L1 5/L3
2/T1 6/T3