4 Connections
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(3) TK4SP Series
Does not feature any digital input terminal due to limited number of terminal blocks.
11Pin Socket(PG-11, PS-11): Sold separately
(4) TK4M Series
Features one digital input terminal (DI-1) due to limited number of terminal blocks. Supports
two multi SVs (SV1 and SV2) only.
(5) TK4W, TK4H, TK4L Series
※ Digital input is not electrically insulated from internal circuits, so it sholud be insulated when
connecting other circuits. (photocoupler, relay, independent switch)