Miscellaneous diagrams and technical information, Vcm-x component & systems wiring 123 – Orion System VCM-X E-BUS Component User Manual
Page 123
VCM-X Component & Systems Wiring
123
Miscellaneous Diagrams and Technical Information
Sensor Checks
The following sensor voltage and resistance tables are provided to aid in checking
sensors that appear to be operating incorrectly. Many system operating problems
can be traced to incorrect sensor wiring. Be sure all sensors are wired per the
wiring diagrams in this manual.
If the sensors still do not appear to be operating or reading correctly, check voltage
and/or resistance to confi rm that the sensor is operating correctly per the tables.
Please follow the notes and instructions below each chart when checking sensors.
Temperature & Humidity Sensor Voltage-Resistance Table
Thermistor Sensor Testing Instructions
Use the resistance column to check the thermistor sensor while
disconnected from the controllers (not powered). Use the voltage
column to check sensors while connected to powered controllers.
Read voltage with meter set on DC volts.
Place the “-”(minus) lead on GND terminal and the “+”(plus) lead
on the sensor input terminal being investigated.
If the voltage is above 5.08 VDC, then the sensor or wiring is “open.”
If the voltage is less than 0.05 VDC, the sensor or wiring is shorted.
Temperature – Resistance – Voltage For Type III 10 K Ohm Thermistor Sensors
Temp
(°F)
Resistance
(Ohms)
Voltage
@
Input
(VDC)
Temp
(°F)
Resistance
(Ohms)
Voltage
@
Input
(VDC)
Temp
(°F)
Resistance
(Ohms)
Voltage
@
Input
(VDC)
-10
93333
4.620
60
14681
3.042
86
8153
2.297
-5
80531
4.550
62
14014
2.985
88
7805
2.242
0
69822
4.474
64
13382
2.927
90
7472
2.187
5
60552
4.390
66
12758
2.867
95
6716
2.055
10
52500
4.297
68
12191
2.810
100
6047
1.927
15
45902
4.200
69
11906
2.780
105
5453
1.805
20
40147
4.095
70
11652
2.752
110
4923
1.687
25
35165
3.982
71
11379
2.722
115
4449
1.575
30
30805
3.862
72
11136
2.695
120
4030
1.469
35
27140
3.737
73
10878
2.665
125
3656
1.369
40
23874
3.605
74
10625
2.635
130
3317
1.274
45
21094
3.470
75
10398
2.607
135
3015
1.185
50
18655
3.330
76
10158
2.577
140
2743
1.101
52
17799
3.275
78
9711
2.520
145
2502
1.024
54
16956
3.217
80
9302
2.465
150
2288
0.952
56
16164
3.160
82
8893
2.407
58
15385
3.100
84
8514
2.352