App. - 14
APPENDIX
(6) Overload protection characteristics
An electronic thermal relay is built in the driver to protect the servo motor and driver from overloads. The
operation characteristics of the electronic thermal relay are shown below. In a machine like the one for
vertical lift application where unbalanced torque is produced, it is recommended to use the machine so that
the unbalanced torque is 70% or less of the rated torque. When you carry out adhesion mounting of the
driver, make circumference temperature into 0 to 45 or use it with 75% or less of effective load torque.
LECSA
□
-
□
series has solid-state servo motor overload protection. (115% of the driver rated current is set
as standard (full load current).)
Op
e
ra
tion
t
ime
[s
]
Op
e
ra
tion
t
ime
[s
]
Load ratio [%]
LECSA
□
-S1
Load ratio [%]
LECSA
□
-S3, LECSA2-S4
(7) Selection example of wires
To comply with the UL/CSA Standard, use UL-approved copper wires rated at 60/75 for wiring.
The following table shows the wire sizes [AWG] and the crimping terminal symbols rated at 60
. The sizes
and the symbols rated at 75 are shown in the brackets.
Driver
Wire [AWG]
L
1
L
2
24V
0V
U
V
W
P
C
B1
B2
LECSA
□
-S1
LECSA
□
-S3
LECSA2-S4
14(14)
14(14)
(Note) 14(14)
14(14)
16(16)
Note. To wire the driver and a servo motor, use the LE-CSM-
□□□
(option). To extend the wiring, use the AWG14 wire size.
(8) About wiring protection
For installation in United States, branch circuit protection must be provided, in accordance with the National
Electrical Code and any applicable local codes.
For installation in Canada, branch circuit protection must be provided, in accordance with the Canada
Electrical Code and any applicable provincial codes.
