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4.3
Over Range
4.4
Under Range
4.5
Testing the Relay Circuits
Customer
Connections
View
M3 / 2.5mm
Hex Drive
If the Red LED is flashing quickly (4 times/second), the
IntelliPoint has detected that uncovered sensing element
capacitance exceeds limits of transmitter. Consult factory for
pad capacitor values and instructions.
If the Red LED is flashing slowly (once per second), the
IntelliPoint has detected that pad capacitor value is too large
or a center wire to Cote Shieldshort. Consult factory for pad
capacitor values.
Use the following steps to check out the relay circuits:
A. Relay circuits consist of a single-pole double-throw relay
contacts brought out to terminal strips for external
switching. See Figure 4-1.
B. Relay operation may generally be heard as an audible click
when background noise is not too high. Connect ohmmeter
to relay contacts to determine if they are switching.
C. Move the fail safe jumper to th eopposite position. The red
LED will change and relay contacts should also change. If the
contacts do not change, the relay is not functioning properly.
M4 / 2.5mm Hex Drive
#8-32 / Phillips-Slotted
5
4
6
3
2
7
1
8
M3 / 2.5mm
Hex Drive
M5 / Slotted Drive
Ground Connection
Relay Circuit Operation
Drive
3
4
NO
C
Figure 4-1
23
Troubleshooting
5
6
7
8
NC
NO
C
NC
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