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| S7-221 |
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The smart compact CPU |
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With 10 inputs/outputs on board |
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Not expandable |
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| S7-224 |
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The compact high-performance CPU |
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With 24 inputs/outputs on board |
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Expandable with up to 7 expansion modules
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| S7-222 |
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The superior compact CPU |
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With 14 inputs/outputs on board |
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Expandable with up to 2 expansion modules |
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| S7-224 XP |
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The power CPU |
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With additional PPI port for added flexibility and communication options |
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With 24 digital and 3 analog inputs/outputs onboard |
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Expandable with up to 7 expansion modules |
| • |
The high-performance CPU |
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With additional PPI port for added flexibility and communication options |
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With 40 inputs/outputs on board |
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Expandable with up to 7 expansion modules |
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