25
2 INSTALLATION & CONNECTION
25
INSTALLATION & CONNECTION
Chapter
2
■External I/O connection
How to connect external output (Sink type)
The external output circuit is operated through an open collector. A1(A7) COM1 is the common
terminal. The open collector output capacity is 30mA and the withstand voltage is up to 30V.
- Equivalent circuit
How to connect external input
(minus common connection of no-voltage contact input type)
A signal is inputted to the signal input circuit by short-circuiting or opening the input terminal and
the COM2 terminal. Short-circuiting is effected by means of a contact (such as a relay or a switch)
or a noncontact (such as a transistor or an open-collector TTL).
The Source type (ISC) for external output signal can be selected at the time of the
purchase, as an option. The method to connect external input/output signal is also
different when source type is installed. Refer to "6-3.External I/O (Source type (ISC)
option)" on page 81. for details of source type (ISC).
CAUTION
COM1
Spark Killer
F372A Inside
DC
Relay
Vext
Supply an external power source for a relay drive
Output Data Tr
OFF OFF
ON ON
● Output Transistor Status
A1
A7
A2~6
A8~10
Vext
PLC etc.
Power
Supply
Plus common connection
Load
power source (Vext).
COM2
Relay
+12V
F372A Inside
IN
IN
Open → OFF
Short → ON
B2~6
B8~12
B7
B1
Push
Switch
Toggle
Switch
TTL Open Collector
(ON when IN is HI)
- The external element is required to withstand Ic=10mA.
- Leakage from the external element is required to be
100μA or below.
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