A&D AD-4408C Bedienerhandbuch PDF herunterladen (Seite 15)

Page 13 AD-4408C Weighing Indicator

5.1.2. Power source

Before connecting the indicator to the power source, read the instruction manual

thoroughly.

Do not connect the indicator to the power source before the installation is complete.

To avoid electrical shock, do not handle the power cable with a wet hand.

Earth ground the indicator. Do not share the ground line with other electrical power

equipment.

The power requirement is 100 VAC to 240 VAC and the frequency is 50 Hz or 60 Hz.

Use a stable power source free from instantaneous power failure or noise.

To avoid a malfunction, do not share the power line with other devices.

The output voltage of a load cell is a very sensitive signal. Keep all electrical noise

sources away from the load cell and load cell cable.

Use shielded I/O cables. Connect the cable shield to the F.G. terminal or the

indicator housing.

5.2. Load Cell Cable Type

Load cell cables should have high insulation and shielding performance.

Use shielded cables with the insulator that is made of materials with high insulation

resistance such as Teflon

and polyethylene.

NOTE: Teflon is a registered trademark of DuPont.

5.3. Shield Connection

Connect the load cell shield wire only to the shield terminal (terminal 7 of the terminal

block located on the rear panel) of the AD-4408C.

No ground is connected between the load cell and the AD-4408C. This is to prevent the

ground loop generated by multiple ground points. Gound loop can be a major cause of

noise and interference.

Earth ground the indicator to prevent electrical shock o

indicator malfunction.

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