Installation And Precautions; Load Cell Connections - A&D AD-4405A Instruction Manual

3. Installation and Precautions

3.1. Installation and Precautions
The AD-4405A weighing indicator is a precision electronic instrument. Handle it carefully.
The operating temperature is -10°C to +40°C (14°F to 104°F).
Do not install the scale in direct sunlight.
Mis-operation or other problems may be caused by an unstable power source including
momentary power failure or instantaneous noise. Use a stable power source.
Do not connect the power cord before the installation has been completed. Do not
handle the power cord with wet hands.
Verify that the local voltage and receptacle type are correct for your indicator.
Use shielded cables for all connections. Connect the cable shields to the shield
terminal or case as an earth terminal.
Earth ground the indicator. Do not share the earth ground line with other electrical
power equipment. There is an earth ground terminal at the power cord receptacle.
Do not install the indicator in a place where it is apt to be charged with static
electricity, or where the relative humidity is lower than 45%RH. Plastic and insulating
materials are apt to be charged with static electricity.
Even if the display is turned off, the power is on while the power cord is connected to the
AC power source.

3.2. Load Cell Connections

Connect the load cell wires to the connector (receptacle) located on the rear panel,
using the accessory load cell plug.
It is possible to connect a 4 wire cable provided that pins 1-2 and pins 3-4 are
connected, if the distance between the indicator and the load cell is shorter than 5m.
At this time, use a cable with a wire having a cross-sectional area of 0.5 mm
greater because thin cables will decrease the temperature coefficient.
The output voltage of a load cell is a very sensitive signal. Space the load cell cable
away from any noise source.
It is possible to connect four 350ohm load cells.
The load cell drive is 5VDC
AD-4405A Weighing Indicator
5% between EXC+ and EXC-, the maximum current 60mA.
Standard connection
Page 5
Connection available for
a cable shorter than 5m.
(Recommended wire cross- sectional
2
area: 0.5 mm or greater)
3. Installation and Precautions
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