28
Connection of stand-alone option unit
It is recommended to configure a sequence, which shuts off power in the input side of the drive unit 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 can not be connected to the
0.2K.)
∗ Refer to the table below for the type number of each capacity of thermal relay and the diagram below for the connection.
Brake Resistor
Thermal Relay Type
(Mitsubishi product)
Contact Rating
MRS120W200 TH-N20CXHZ-0.7A
110VAC 5A,
220VAC 2A(AC11 class)
110VDC 0.5A,
220VDC 0.25A(DC11 class)
MRS120W100 TH-N20CXHZ-1.3A
MRS120W60 TH-N20CXHZ-2.1A
MRS120W40 TH-N20CXHZ-3.6A
MYS220W50
(two units in parallel)
TH-N20CXHZ-5A
High-duty
Brake Resistor
Thermal Relay Type
(Mitsubishi product)
Contact Rating
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
NOTE
The brake resistor connected should only be the dedicated brake resistor.
Brake resistor can not 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.
Parameters referred to
Pr. 30 Regenerative function selection Refer to page 97
MC
Drive unit
MC
R
PR
P/+
S/L2
T/L3
R/L1
OFF
ON
OCR
Contact
Power supply
F
<Example 1>
MC
High-duty brake
resistor (FR-ABR)
Thermal relay
(OCR) (*)
Drive unit
MC
R
PR
P/+
S/L2
T/L3
R/L1
OFF
ON
B
C
Power supply
F
<Example 2>
MC
High-duty brake
resistor (FR-ABR)
OCR
Contact
MC
Thermal relay
(OCR) (*)
To the drive unit
terminal P/+
To a resisto
TH-N20
1/L1 5/L3
2/T1 6/T3
