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ES2 Electronic Liquid Level Transmitter
EX-1845
Power Requirement (14–40 Vdc)
The ES2 transmitter requires a source of DC power for op-
eration. Minimum excitation voltage must be no less than
14 Vdc. Any receiver installed on the signal loop (meters,
data loggers, controllers, etc.) must be taken into account
when determining the required power supply voltage to be
used. The internal resistance of each device added together
represents the total “load” residing on the signal loop circuit.
Load Capacity = (Supply Voltage - 14)
(OHMS)
.02
Load Capacity at Supplied Voltage
KING-GAGE tank processors and LevelBAR provide 24 Vdc
excitation to power the signal loop circuit. (If the application
requirement exceeds 500-ohms, an external power supply
of appropriate voltage will be required.)
ES2 Signal Connection
20 Vdc
24 Vdc
28 Vdc
32 Vdc
300 ohms
500 ohms
700 ohms
900 ohms
The external connector of the ES2 transmitter affords an
impermeable barrier against moisture infiltration of the
transmitter housing. This connector receptacle has a metric
M12 screw collar and is intended for plug type molded
cable assemblies designed for 4-pole signal termination.
Our ES2 transmitter package also includes a molded M12
cable (32 ft / 10 m) to simplify installation and ensure a
sealed connection at the unit—this molded cable meets
IP68 standards for ingress protection.
NOTE: Avoid installing sensitive measuring equipment, or
wire carrying low level signals, near sources of electrical and
magnetic noise, such as breakers, transformers, motors,
SCR drives, welders, fluorescent lamp controllers, or relays.
Use twisted pair wiring to reduce magnetic noise pickup.
Never run signal-carrying wires in the same conduit that
carries power lines, relay contact leads, or other high-level
voltages or currents.
The signal output is transmitted through 4-20 mA current
loops that are low impedance electric circuits. Long cabling
runs can increase the susceptibility for higher levels of noise
to be transferred to the current loop circuit. Also, inter-
mittent EMI or RFI with a changing frequency or intensity
may induce interference on the transmitted output signal.
Brown
: + SIGNAL (+ V power)
White
: - SIGNAL (- or common)
Blue
: SHIELD (ground)
Black (Not Used)
32 ft.
10 m
4.5 in.
114 mm
Overall
1.96 in.
50 mm
Supplied Cable
M12 Connector
