CNT-SVX09E-EN 27
Troubleshooting
Figure 12. Voltage measured across terminals vs. input current
0 2 4 6 8 101214161820
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
Current (mA)
Voltage (Vdc)
Table 21. Universal input troubleshooting with a 0–10 Vdc input
Step Number Action Probable Cause
Step 1
After following the steps in Table 17, p. 25, disconnect the sensor wires from the input terminals.
Use the volt m
eter (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 Table 22, p. 27). If the voltage is not in that range, the
MP503 has a circ
uit 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
To Next Page
Loading...
