80-5212-322 Datasheet, PDF (12/28 Pages) Magnetrol International, Inc. – RF Point Level Switches

Probe preamplifier to
positive and negative
terminals on amplifier.
(+) (—)
TB1
POWER
Probe range
jumper (JU1)
LO HI
PROBE
Connect white wire to
probe connection screw.
Figure 9
Probe preamplifier circuit board
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.
9
50-605 Kotron RF Point Model 80/81 Level Switches