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Distributed I/O System ET 200S

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4.4.4 Using the shield connection<br />

Rules<br />

4.5 4.5<br />

Analog electronics modules<br />

4.5 Parameters for analog electronic modules<br />

To prevent interference we recommend the following with the analog electronic modules:<br />

• Use shielded wires to the sensors and actuators.<br />

• Lay out the wire shields on the shield connection.<br />

• Connect the shield connection with low impedance to the ground bus.<br />

Parameters for analog electronic modules<br />

4.5.1 Parameters for analog electronic modules 2AI U Standard, 2AI I 2WIRE Standard,<br />

4AI I 2WIRE Standard, 2AI I 4WIRE Standard<br />

Table 4-30 Parameters for analog input modules U, I Standard<br />

2AI U<br />

Standard<br />

2AI I 2WIRE<br />

Standard<br />

4AI I 2WIRE<br />

Standard<br />

2AI I 4WIRE<br />

Standard<br />

Group diagnosis (parameter assignment error, • disable<br />

internal error)<br />

• Enable<br />

Diagnostics: Overflow/underflow • disable<br />

• Enable<br />

Diagnostics:<br />

wire break2 Diagnostics: Diagnostics:<br />

wire break wire break1 • disable<br />

• Enable<br />

Smoothing • None<br />

• Weak<br />

• Medium<br />

• Strong<br />

Type/range of --- --- • De-activated<br />

measurement<br />

• ± 5 V<br />

• Up to 5 V<br />

• ± 10 V<br />

--- Type/range of --- • De-activated<br />

measurement<br />

• 2 WIRE: 4 to 20 mA<br />

--- --- Type/range of • De-activated<br />

measurement • 4 WIRE: 4 to 20 mA<br />

• 4 WIRE: ± 20 mA<br />

1 Only in the measuring range 4 mA to 20 mA<br />

2 Only in the measuring range 1 V to 5 V<br />

Range of values Default setting Applicability<br />

disable Module<br />

disable Module<br />

disable Channel<br />

None Channel<br />

± 10 V Channel<br />

2 WIRE: 4 to 20 mA Channel<br />

4 WIRE: 4 to 20 mA Channel<br />

<strong>ET</strong> <strong>200S</strong><br />

Manual, 12/2005, A5E00514527-03 4-27

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