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■SI/F connection
The 2-wire serial interface has connective ability for coupling a UNIPULSE printer, external
display, etc. Connect from A11 and A12 of the external input/output connector.
The interface is nonpolarized and up to three external instruments may be connected.
A two-core parallel cable or a cabtyre cable (Wire with covering thickened for construction) may be
used for connection. When a two-core parallel cable or a cabtyre cable is used, the transmitting
distance is approximately 30m. When a two-core shielded twisted pair cable is used, the
transmitting distance is approximately 300m.
Do not parallel it with AC lines and high-voltage lines. It may cause of malfunction.
■External I/O connection
CAUTION
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 78. for details of source type (ISC).
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
F377A Inside
A2~6
A8~10
A1
A7
COM1
● Output Transistor Status
Output Data
Tr
OFF
OFF
ON
ON
F377A
A11
SI/F
A12
← Inside Outside →
Plus common connection
Vext
Supply an external power source for a relay drive
power source (Vext).
2 INSTALLATION & CONNECTION
Printer
Display
Vext
Spark Killer
Relay
PLC etc.
Chapter
Converter
DC
Power
Supply
Load
21
2
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