CNT-SVX09E-EN
27
Troubleshooting
Figure 12.
Voltage measured across terminals vs. input current
0
2
4
6
8
10
12
14
16
18
20
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
Current (mA)
Voltag
e (Vdc)
Table 21. Universal input troubleshooting with a 0–10 Vdc input
Step Number
Action
Probable Cause
Step 1
After following the steps in
, disconnect the sensor wires from the input terminals.
Use the volt meter (set to read dc voltage) to measure the voltage across the terminals for the
input you are troubleshooting.
The voltage should be 3.1–3.8 Vdc (see
). If the voltage is not in that range, the
MP503 has a circuit board problem.
Circuit board
problem.
Table 22. Voltage measurements at universal inputs (no sensor connected)
Input Type
Expected Value
Acceptable Range
Thermistor
5.00 Vdc
4.75 to 5.25 Vdc
Binary
17.00 Vdc
16.00 to 18.00 Vdc
0–20 mA
0.116 Vdc
0.100 to 0.130 Vdc
0–10 Vdc
3.43 Vdc
3.10 to 3.80 Vdc
