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Distributed I/O System ET 200S

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Analog electronics modules<br />

4.16 2AI RTD High Feature analog electronic module (6ES7134-4JB51-0AB0)<br />

Note<br />

Please note the following to ensure optimum line compensation in the case of Cu10:<br />

• The sum of the cable resistance and measurement resistance must not exceed 31 Ω.<br />

• The cable must have a resistance of no more than 8 Ω if you want to use the<br />

temperature range up to and above 312 °C.<br />

Example: A 200 m Cu cable with a 0.5 mm 2 conductor cross-section has<br />

approximately 7 Ω. A smaller cross-section shortens the permissible cable length<br />

accordingly.<br />

Using PTC resistors<br />

PTCs are suitable for temperature monitoring and as thermal protective devices for complex<br />

drives and transformer windings.<br />

• Select "Two-wire resistor" and "PTC" at parameter assignment:<br />

• Connect the PTC in accordance with the two-wire connection method.<br />

• Apply PTC resistors of type A (PTC thermistors) in accordance with DIN / VDE 0660,<br />

Part 302.<br />

• If the diagnosis "Overrun/underrun" is enabled, a diagnosis "Lower limit exceeded"<br />

indicating a short-circuit is indicated at resistance values < 18 Ω.<br />

• Sensor data for the PTC resistor:<br />

Characteristic Technical<br />

specifications<br />

Remarks<br />

Switching points Behavior with rising temperature<br />

< 550Ω Normal range:<br />

• SIMATIC S7: Bit 0 = "0", Bit 2 = "0" (in the PII)<br />

• SIMATIC S5: Bit 3 = "0", Bit 5 = "0" (in the PII)<br />

550Ω to 1650Ω Prewarning range:<br />

• SIMATIC S7: Bit 0 = "0", Bit 2 = "1" (in the PII)<br />

• SIMATIC S5: Bit 3 = "0", Bit 5 = "1" (in the PII)<br />

> 1650Ω Addressable range:<br />

• SIMATIC S7: Bit 0 = "1", Bit 2 = "0" (in the PII)<br />

• SIMATIC S5: Bit 3 = "1", Bit 5 = "0" (in the PII)<br />

Behavior with rising temperature<br />

> 750Ω Addressable range:<br />

• SIMATIC S7: Bit 0 = "1", Bit 2 = "0" (in the PII)<br />

• SIMATIC S5: Bit 3 = "1", Bit 5 = "0" (in the PII)<br />

750Ω to 540Ω Prewarning range:<br />

• SIMATIC S7: Bit 0 = "0", Bit 2 = "1" (in the PII)<br />

• SIMATIC S5: Bit 3 = "0", Bit 5 = "1" (in the PII)<br />

< 540Ω Normal range:<br />

• SIMATIC S7: Bit 0 = "0", Bit 2 = "0" (in the PII)<br />

• SIMATIC S5: Bit 3 = "0", Bit 5 = "0" (in the PII)<br />

(TNF-5) °C<br />

(TNF+5) °C<br />

(TNF+15) °C<br />

Measuring voltage<br />

Voltage on the PTC<br />

max. 550 Ω<br />

min. 1330 Ω<br />

min. 4000 Ω<br />

max. 7.5V<br />

TNF= rated operating temperature<br />

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

4-84 Manual, 12/2005, A5E00514527-03

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