The Digital I/O Modules (CENTUM-ST Compatible) receive contact or voltage status signals from the ﬁeld, and/or output status signals to the ﬁeld via transistor contacts.

Item	Speciﬁcations
Model	ADV859	ADV159	ADV559
Number of I/O channels	16-channel input, 16-channel output	32-channel input	32-channel output
Signal isolation	Isolated channels	Isolated channels	Isolated channels
Input signal	Contact input: OFF signal 100 kΩ or more ON signal 200 Ω or less Minimum current value when contact is short- circuited: 1.25 mA Voltage input: OFF signal 4.5 to 25 V DC ON signal ±1 V DC, 200 Ω or less
Input contact rating	5 V DC, 20 mA or more
Pushbutton input function	Not supported	Supported	–
Input response time	8 ms (for status input)	8 ms (for status input)
Minimum ON detection time	–	20 ms (for pushbutton input)	–
Maximum ON/OFF cycle		25 Hz (for pushbutton input)
Output signal	Transistor contact	–	Transistor contact
Output contact rating	Inductive load, resistive load: 30 V DC, 100 mA (*1)	–	Inductive load, resistive load: 30 V DC, 100 mA (*1)
Output response time	16 ms or less	–	16 ms or less
Pulse width	8 ms to 7200 s		8 ms to 7200 s
Pulse width resolution	8 ms, add max. 1ms for ON/OFF delay time		8 ms, add max. 1ms for ON/OFF delay time
Maximum current consumption	450 mA (5 V DC)	330 mA (5 V DC)	570 mA (5 V DC)
Weight	0.3 kg	0.4 kg	0.3 kg
External connection	Dedicated cable (KS2)	Dedicated cable (KS2)	Dedicated cable (KS2)
Compatible card	ST2 compatible	ST3 compatible	ST4 compatible

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