Mitsubishi Electric FR-D700 Series Instruction Manual page 22

Connection of a dedicated external brake resistor (MRS type, MYS type, FR-ABR)
2.4 Connection of a dedicated external brake resistor (MRS type,
MYS type, FR-ABR)
Install a dedicated brake resistor (MRS type, MYS type, FR-ABR) outside when the motor driven by the inverter is made to run
by the load, quick deceleration is required, etc. Connect a dedicated brake resistor (MRS type, MYS type, FR-ABR) to
terminal P/+ and PR. (For the locations of terminal P/+ and PR, refer to the terminal block layout (page 11).)
Set parameters below. (
Connected Brake Resistor
MRS type, MYS type
MYS type
(used at 100% torque/6%ED)
FR-ABR
 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.)
<Example 1>
Power supply
T *2
F
MC
OFF
ON
MC

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.)

When the power supply is 400V class, install a step-down transformer.
Power
Supply Brake Resistor
Voltage
MRS120W200
MRS120W100
100V,
MRS120W60
200V
MRS120W40
MYS220W50
(two units in parallel)
Power
High-duty
Supply
Brake Resistor
Voltage
FR-ABR-0.4K
FR-ABR-0.75K
FR-ABR-2.2K
FR-ABR-3.7K
100V,
200V
FR-ABR-5.5K
FR-ABR-7.5K
FR-ABR-11K
FR-ABR-15K
FR-ABR-H0.4K
FR-ABR-H0.75K
FR-ABR-H1.5K
FR-ABR-H2.2K
400V FR-ABR-H3.7K
FR-ABR-H5.5K
FR-ABR-H7.5K
FR-ABR-H11K
FR-ABR-H15K
NOTE
 The brake resistor connected should only be the dedicated brake resistor.
 Perform wiring and operation according to the Instruction Manual of each option unit.
 Brake resistor cannot be used with the brake unit, high power factor converter, power supply regeneration converter, etc.
 Do not use the brake resistor (MRS type, MYS type) with a lead wire extended.
 Do not connect a resistor directly to terminals P/+ and N/-. This could cause a fire.
18
Refer to the Instruction Manual (Applied) for the parameter details.)
Pr. 30 Regenerative function selection Setting
0 (initial value)
1
1
Thermal relay
High-duty brake
MC (OCR) (*1)
Inverter
resistor (FR-ABR)
R/L1 P/+
S/L2
T/L3 PR
OCR
Contact
Thermal Relay Type
(Mitsubishi Electric
product)
TH-T25-0.7A
TH-T25-1.3A
TH-T25-2.1A
TH-T25-3.6A
TH-T25-5A
Thermal Relay Type
(Mitsubishi Electric
product)
TH-T25-0.7A
TH-T25-1.3A
TH-T25-2.1A
TH-T25-3.6A
TH-T25-5A
TH-T25-6.6A
TH-T25-11A
TH-T25-11A
TH-T25-0.24A
TH-T25-0.35A
TH-T25-0.9A
TH-T25-1.3A
TH-T25-2.1A
TH-T25-2.5A
TH-T25-3.6A
TH-T25-6.6A
TH-T25-6.6A
Pr. 70 Special regenerative brake duty Setting
<Example 2>
R
Power supply
*2
T
F
MC
OFF
ON
MC
Rated Operating Current
120VAC: 2A (NO contact) /
3A (NC contact),
240VAC: 1A (NO contact) /
2A (NC contact) (AC15 class)
110VDC: 0.2A,
220VDC: 0.1A (DC13 class)
Rated Operating Current
120VAC: 2A (NO contact) /
3A (NC contact),
240VAC: 1A (NO contact) /
2A (NC contact) (AC15 class)
110VDC: 0.2A,
220VDC: 0.1A (DC13 class)
—
6%
7.5K or lower
11K or higher
Thermal relay
High-duty brake
MC Inverter (OCR) (*1) resistor (FR-ABR)
R/L1 P/+
S/L2
T/L3 PR
B
C
OCR
Contact
1/L
1
2/T
1
To the inverter
terminal P/+
10%
6%
R
5/L
3
6/T
3
To a resistor