Sensor Wiring

Overview

Connect the correct sensor leads to the main board according to the lead locations labeled directly on the

main board.

Rosemount Analytical SMART pH sensors can be connected to the 1066 using either the integrated cable

SMART sensor or a compatible VP8 pH cable.

After completing the wiring of the sensor leads, carefully route the excess sensor cable through the cable

gland.

Separate the sensor and output signal wiring from the loop power wiring. Do not place the sensor and

power wires in the same conduit or near a cable bridge.

Sensor Wiring Details

Sensor wiring should be done in the order shown above.

If the solution ground terminal is left open without doing so, a high reference impedance fault alarm will

continue to sound.

TB4 Preamplifier Power: The power wire from the pH sensor or preamplifier in the junction box is

connected to this terminal to supply power to the preamplifier.

TB1 pH Electrode Input: The pH electrode lead and its shield are located on this terminal as shown.

Smart pH Sensor: The smart pH sensor has a ground wire (not to be confused with the solution ground

wire)

that should be connected to the enclosure ground as shown in the power wiring diagram