ABUS Technologies LPI-T Loop Powered Indicator - Manual (Page 4)

ABUS TECHNOLOGIES INC.
4
LPI-T
1. INTRODUCTION
The LPI-T is a microprocessor controlled loop powered display for any 4 ~ 20
mA standard signal. It does not require its own separate voltage source as it is
supplied directly from the measuring current loop.
The measured value is displayed on a 4-digit LCD with a wide max. display
range of -1999 to +9999 digits.
The operating range of the display device can be directly adjusted to the
transmitter without any accessories being required. Simply enter the maximum and
minimum measuring range limits and the decimal point position.
The LPI-T display is fit for all of the transmitters and converters with 4 ~ 20mA
2-wire technique, just as pressure, differential pressure, temperature, flow, PH,
acceleration and so on. 16 Bit ADC MCU inside, allows customers to use the two
buttons, to program the zero point, span, decimal point, damping and alarm point etc.
Over or under range are displayed as a message. The integrated smart diagnostic
system continuously monitors all device function. The programmed parameters are
stored in an EEPROM to be restored in case of a power failure. The LPI-T is powered
by the current loop of the 4 to 20 mA signal transmitter. No additional auxiliary power
is required.
2. PRESENTATION
2.1 Features
1. 2-wire, no additional power supply required, just as traditional LED display.
2. Scale easily adjustable to transmitter range.
3. Option: with backlight, can be visible in the dark environment.
4. 16-bit ADC MCU inside.
5. Large display range of -1.9.9.9. ~ 9.9.9.9. LCD digits.
6. LED can work at 3mA.
7. Two OPTO switch outputs. (Optional)
8. Low circuit voltage drop.