JUMPER AND SWITCH SETTINGS
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4 JUMPER AND SWITCH SETTINGS
4.1 JUMPER SETTINGS
4.1.1 Power Source Jumper Settings
For most applications input power is provided by connecting to the dedicated spring clamp
connectors inside the SC4000.
However SC4000 may accept power from the connected reading device through the 25-pin
Data Source connector. This is useful, for example, to pass power to connected accessories
such as Encoder and Presence Sensor from DX8200A VAC models or 6K/8K scanners
powered directly through the network. See the relative reading device Reference Manual for
details.
To power SC4000 from the data source, the power source jumper must be placed in the
"power from device" position as indicated in Figure 3.
Power from
device
Power from
clamps (default)
Figure 3 - Power Source Jumper Settings
4.1.2 Host 2 Shield Jumper Settings
The Host Interface 2 shield (Shield) can be connected to Earth Ground (Earth) either directly
or through a filter circuit. If the jumper is left open, the network cable shield (Shield) is
floating.
Equivalent
Filter Circuit
Filtered Earth (default)
Earth
Floating
Figure 4 - Host 2 Shield Jumper Settings
4.1.3 Source Chassis Grounding Jumper Settings
The data source chassis grounding method can be selected by positioning a jumper (see
Figure 5 ). In this way the reading device chassis can be connected to earth ground (only if
pin Earth is connected to a good earth ground). For all reading devices except 6K/8K, the
chassis can alternatively be connected to the power supply ground signal (GND) or it can be
left floating but, in this case, the jumper must be removed. For 6K or 8K scanners the chassis
is internally connected to GND.
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