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ABB DC551-CS31 Interface module. CS31 slave. 8 DI: 24VDC. 16 configurable DI/DO: 24VDC 0.5A (DC551-CS31)
DC551-CS31: S500 Interface module. CS31 slave. 8 DI: 24VDC. 16 configurable DI/DO: 24VDC 0.5A. Extendable by up to 7 I/O modules.
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