815222322 datasheet(12/28 Pages) MAGNETROL

12 / 28 page

50-605 Kotron RF Point Model 80/81 Level Switches

Caution: Observe all applicable electrical codes and proper wiring

procedures.

5. Replace housing cover.

6. Power up unit and proceed with calibration of instrument

as described in instructions following.

NOTE: Be certain to route all power and control wires through con-

duit outlet only and run probe wire up through center hole in

amplifier housing base. Supply voltage and signal wires

should not be run in the same conduit.

2.7.2 Remote Mount Models

Remote type units are furnished with a preamplifier hous-

ing having a circuit board with preamplifier-to-amplifier

terminals. Preamplifier connection terminals are located

at the upper left side of the preamplifier circuit board.

Refer to Figure 9.

Locate the white wire which is fastened to the (+) Probe

Terminal on the circuit board. Connect the free end of

this wire to the Probe Connection Screw. Refer to

Figure 6 on page 4.

2.7.2.1 Probe Preamplifier Wiring

1. Strip approximately .75 inch of outer jacket insulation

from each end of the conductor.

2. At the probe preamplifier end, twist the black wire and

shield together to form a single conductor. Crimp on sol-

derless connectors securely to both red and black leads.

3. Connect the red lead to the positive (+) terminal on the

probe preamplifier board. Refer to Figure 9.

4. Connect the black wire and shield to the negative (–)

terminal on the probe preamplifier board.

5. At the main amplifier location, twist the black wire and

shield together to form a single conductor.

6. Crimp on solderless connectors securely to both the

red and black leads.

7. Connect red lead to positive (+) terminal on the

amplifier. Refer to Section 3.4, Terminal Connections on

page 21.

8. Connect black wire and shield to the negative (–)

terminal on the amplifier.

TB1

POWER

PROBE

Connect white wire to

probe connection screw.

Probe range

jumper (JU1)

Probe preamplifier to

positive and negative

terminals on amplifier.

(+)

(—)

Figure 9

Probe preamplifier circuit board

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