822-1002-C01 Datasheet, PDF (12/40 Pages) Magnetrol International, Inc. – Kotron® Sentinel Models 822, 832 and 842

5. Replace housing cover.
6. Apply power to the unit, and proceed with calibration
of instrument as described in Section 2.0, Calibration
beginning on page 10.
NOTE: Be certain to route all power and control wires through conduit
outlet only and run probe wire up through center hole in ampli-
fier housing base.
1.7.3 Relay Wiring Chart
Kotron
Power
Material
Level
Fail-safe
Relay
Coil
Relay Terminals
CM to NC CM to NO
High
On
Low
High
Fail
Low
HLFS
LLFS
HLFS
LLFS
HLFS
LLFS
HLFS
LLFS
De-energized
Energized
Energized
De-energized
De-energized
De-energized
De-energized
De-energized
Closed
Open
Open
Closed
Closed
Closed
Closed
Closed
Open
Closed
Closed
Open
Open
Open
Open
Open
NOTES AND DEFINITIONS:
1. Equipment controlled by the Kotron relays is assumed to
be powered from one source, while the Kotron unit itself is
assumed to be powered from a different source.
2. Fail means a loss of power to the Kotron unit.
3. HLFS (high level fail-safe) means a material level in the
tank which is equal to or above:
a. The setting of a narrow differential point.
b. The higher setting of a wide differential point.
4. LLFS (low level fail-safe) means a material level in the tank
which is equal to or below:
a. The setting of a narrow differential point.
b. The lower setting of a wide differential point.
5. a. When the relay coil is de-energized, a connection is
made between terminals C (common) and NC (nor-
mally closed), and there is no connection between C
and NO (normally open).
b. When the relay coil is energized, a connection is made
between terminals C and NO, and there is no connec-
tion between C and NC.
6. If Relay 1 is being used as a dedicated diagnostic alarm,
the relay will always de-energize upon fault detection.
9
50-621 Kotron Sentinel Models 822, 832 and 842 RF Point Level Switches