Input / Output Interface Type - Savch SDA2 Series User Manual

2.9 Input / Output Interface Type

2.9.1 Digital input interface
Digital input interface circuit can be operated by the switch, relay, open collector transistor circuit,
optocoupler etc. The relay should be the low electric current, in order to avoid the faulty contacting. The external
voltage range :DC12V~24V.
NPN crystal, common emitter SINK mode
· Internal power
· External power
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