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Hirschmann Joint 2-wire passive Intelligent Loop (LED) Display Meter SY LED5
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Updated: 2018-09-05 15:01:39
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SY LED5 Low cost Hersmann Joint 4-Digit 2-wire Passive Intelligent 4-20mA Current LED
Display Meter input is passive signal, output 2 lines can be connected to the transmitter 4-20mA loop in serial
GDM3009 socket and plug is designed in the display meter. It can display decimal number correspondingly
based on the settings through 4-20mA analog signal in the loop. SY LED5 series Display Meter is designed on
the base of 2-wire passive mode; it measures the electric signal which can be used as the input signal and the
operating power supply of the display meter. The meter operates without power supply, low cost, high
precision, small size, so it is very convenience to use. The traditional analog display meter uses potentiometer
to do adjust parameters, it is not convenience and very easy to be effected by temperature. Compared with
traditional analog display meter, the LED display meter is set by 2 buttons and controlled by CPU, the zero,
span, decimal, alarm, delay time, etc parameters can be set by user, it is much more flexible and convenient in
use. That display meter has use LED display board and operates in continuous voltage, in the 4-20mA
measuring range, the display digits are in equal and stable brightness. It has anti-reverse connection,
over-current protection and is widely applied in industrial site, oil, environment monitor, temperature, pressure,
flow, level measuring, etc site and fields. In the actual applications, the LED display meter converts
temperature, pressure, flow, level, etc physical quantity into 4-20ma signal, then connect with SY LED2 display
meter, it displays the temperature, pressure, flow, and level, etc physical quantity to provide convenience for
user to monitor and control the industrial site.
SYLED5 Display Meter is used to measure 4-20mA DC current signal, it does not need power supply and
get power from 4-20ma current loop. The digits displayed are not the actual current value, it is the preset value
of 4mA, 20mA, and displays the current valued measured based on the preset value in linearity method. E.g.:
4mA is set to 0, 20mA is set to 8000, then if input is 8mA, the meter displays 2000, input is 12mA, the meter
displays 4000. If 4mA is set to 1000, 20mA is set to -1000, when input is 12mA, the meter displays 0, input is
16mA, the meter displays -500. The max. display range is 9999, that is four digits, min. Display range is -1999.
SY LED5 Digit Display Meter has alarm function and 2-channel isolated switch quantity output to realize
timely display, controlling and alarm. The alarm function is realized by programming, and there are 2 pieces of
PC452 land pad is reserved for customer use when alarm function is required. The display meter has 2 alarm
points which can be set in up and down directions. The alarm target of the alarm point is the digit displayed,
when there is alarm, the last decimal of the LED Meter is flashing, and the alarm signal is output through
terminal which can drive the Optocoupler.

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