CONNECTION DIAGRAM UNIVERSAL
This diagram provides the basic function of each pin in the DP-4 electrical connector and is the starting
point for interfacing the DP-4 to non-Centroid control systems or trouble-shooting existing systems.
The COIL CORD pinout and internal wire colors are also presented to facilitate installing custom
connectors for non-Centroid systems. The connections can be summarized as follows:
1) Power: DC voltage supply, positive terminal connected to pin 2, negative to pin 5.
2) Signal: Current sinking type, pin 3 appears connected to pin 5 when signal is active. Pin 3 appears
unconnected when signal is not active. Pin 3 voltage is limited to 0V to +60VDC Maximim relative to
pin 5. Pin 5 is common to both signal and power therefore signal circuit to pin 3 must be carefully
planned to avoid damaging the probe.
3) Supervision: A supervision circuit loop using pin 4 and pin 5 provides an indication that the probe
has been connected. This circuit detects that the probe has been connected.
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