
DOTX-45 Dissolved Oxygen System Part 5 – Sensor Assembly
DOTX-45 20 -
The analog outputs from the system are present at terminals TB1 and TB2. The
loop-load limitation in this configuration is 500 Ohms maximum for each output.
Also note that these two outputs are completely isolated from each other to
insure that ground loops do not result from the connection of both outputs to the
same device such as a PLC or DCS.
In the line-powered unit, a ribbon cable connects the power supply assembly with
the microprocessor assembly located in the front section of the enclosure. This
cable can be removed during installation to facilitate wiring if desired. It is best to
unplug only one end. The ribbon cable has a marking stripe on one edge that is
used to indicate proper orientation. The indicator stripe should be on the bottom
edge of the cable when installed as shown in Figure 4-2.
Figure 4-3 Line Power Connection
The power strip, TB5, allows up to 12 AWG wire. A wire gauge of 16
AWG is recommended to allow for an easy pass-through into the M16
ports when wiring.
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