53 digital i/o connecuons, Toshiba – Toshiba LF434 User Manual
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53 Digital I/O ConnecUons
Pigiial li O terminals consist of conti.ct output terminals (standard DOl and optional
D02), voltage signal input terminal (1)1, optional), and signal common terminal (COM),
Each terminal (DOl, D02 and Dl) is isolated from internal circuits, Terminal (COM) is
the signal common for the other three terminals (PC I, D02 and DI).
Functions can he assigned for each terminal with the LCD control keys (option). See
Chapter 10, “Digital t/0 Functions.’"
To ciinnect an electromagnetic relay or counter to the contact output terminal (DOl Or D02),
put a surge^absorbing diode into the input circuit of the relay or counter. See Figure 5,3 for
an example of electromagnetic counter connection.
Solidbtate rchiy
Note 1; Use a surge-absorbing diode of the rating: current rating lA and voltage rating
200 V minimum.
Note 2; The Solidstaic relay, photo-coupler and resistor are not provided fiir the standard
model (the one with no digital I/O specifications), Leave the terminals for D02 and
Di open.
Figure 53 Electromagnetic Counter Connoction Example
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