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Brief description：
Digital I/O Expansion board is used to expand the digital input and output terminals. SL-3X2Y、SL-5X、SL-5Y provide 3 channels digital input terminals, 2channels digital output terminals, 5 channels digital input terminals, 5 channels digital output terminals.
Digital I/O Expansion board is used to expand the digital input and output terminals.
SL-3X2Y、SL-5X、SL-5Y provide 3 channels digital input terminals, 2channels digital output terminals, 5 channels digital input terminals, 5 channels digital output terminals.
SL-5X6T——-relay expand unit, used to expand the quantity of 5channels digital input and 6 channels relay output interface, it could be widely used in water supply industry.
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