Chapter 6 - Parameter Description [I/O]
6-55
Specification of External PTC/NTC Thermistor
Sensor
Resistance
based on 25℃
Resistance by temperature
Measurable
Temp range
PTC 1 ㏀(±5%)
R(T)=[1+A*(Measured temp-25)+B *( Measured temp -
25)
2
][㏀]
A=7.635X10
-3
, B=1.371 X10
-5
0~125[℃]
NTC 2.545 ㏀(±5%) See the table below for NTC resistance by temperature. 0~150[℃]
☞ Note : Measurable temp range varies by thermal sensors. Select the sensor after checking the
measurable temp range specification.
NTC resistance according to temperature
Temp
[℃]
Resista
nce
[㏀]
Temp
[℃]
Resista
nce
[㏀]
Tem
p
[℃]
Resista
nce
[㏀]
Tem
p
[℃]
Resista
nce
[㏀]
Tem
p
[℃]
Resista
nce
[㏀]
Tem
p
[℃]
Resista
nce
[㏀]
Tem
p
[℃]
Resista
nce
[㏀]
80
0.3562
90
0.2649
100
0.2002
110
0.1536
120
0.1195
130
0.0942
140
0.0752
81
0.3455
91
0.2574
101
0.1949
111
0.1497
121
0.1167
131
0.0921
141
0.0736
82
0.3353
92
0.2502
102
0.1897
112
0.1459
122
0.1139
132
0.0900
142
0.0720
83
0.3254
93
0.2432
103
0.1847
113
0.1423
123
0.1112
133
0.0880
143
0.0705
84
0.3158
94
0.2364
104
0.1798
114
0.1387
124
0.1085
134
0.0860
144
0.0690
85
0.3066
95
0.2299
105
0.1751
115
0.1353
125
0.1060
135
0.0841
145
0.0675
86
0.2976
96
0.2236
106
0.1705
116
0.1319
126
0.1035
136
0.0822
146
0.0661
87
0.2890
97
0.2174
107
0.1661
117
0.1287
127
0.1011
137
0.0804
147
0.0647
88
0.2807
98
0.2115
108
0.1618
118
0.1255
128
0.0987
138
0.0786
148
0.0633
89
0.2727
99
0.2058
109
0.1577
119
0.1225
129
0.0965
139
0.0769
149
0.0620
150
0.0608
☞ Note: Use the external NTC having the specification above and adjust I/O-98 when the temp
difference between inverter and external sensor is occurred.
☞ Note: Overheat protection can be monitored by setting one of the I/O-76~79 [Aux mode 1, 2, 3] to
“OH”.
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