Teledyne LXT-220 - Manual (Page 17)

Dissolved Oxygen Controller Introduction
Teledyne Analytical Instruments 17
1.5 Internal Connections
All user connections are made inside the unit on removable terminal
blocks. Two conduit holes are provided on the NEMA-4X housing, one for
low level DC signal and the other for 115VAC power wiring. Access to the
terminal blocks is gained after removing the 4 captive jackscrews on the
front of the instrument. Figure 2 shows the internal layout of the LXT-220
Controller. A label on the enclosure cover shows the terminal block
arrangement for all the wiring along with the model number and the factory
assignment of the output signals. These can be changed in the field if the
application prefers a different arrangement.
Figure 1-2: Internal Layout of the LXT-220 DO Controller