— A-3 —
Appendix 2: How to Check Motor Condition
l
Check resistance and insulation resistance of Motor winding in order to confirm Motor
condition.
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Firstly, examine the Motor with the cable set. If something is wrong, then examine the Motor
itself.
(1) Resistance check of Motor winding
Figure A-1: With the cable set
Figure A-2: Motor only
5 10 15
4
9 14
3
8 13
2
7 12
1
6 11
Connector
Tester
A
View from A
Connector Lock
Table A-2: Pin number to be checked.
Cable connector
Motor connector
Result
Phase A
1 pin
«
2 pin
(A+) (A-)
5 pin
«
4 pin
(A+) (A-)
Phase B
3 pin
«
4 pin
(B+) (B-)
10 pin
«
9 pin
(B+) (B-)
Phase C
5 pin
«
6 pin
(C+) (C-)
15 pin
«
14 pin
(C+) (C-)
Table A-3: Specification
Motor number
Motor winding resistance (
W
)
Tolerance
YZ1 (100VAC)
2.1
YZ1 (200VAC)
9.5
YA1
2.8
YA2
5.6
YB1
4.6
YB2
2.6
YB3
3.8
1. Allowance
: ±30%
2. Variations between each phase
: 1
W
or less
(øA, øB, øC)
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If your motor is a specially ordered one, or the cable is longer than 4m, contact NSK for
specification.
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