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3. SPECIFICATIONS
MELSEC-A
I
When the printer function is used, operations are same as those i n
no-protocol mode.
(c) SG signal
Connect the shield of the connecting cable t o p i n 5 of the
A1 SJ71 C24.
(d) DSR signal
Data is only transmitted from theAlSJ71C24 when this signal is ON.
(e) RS signal
The A1 SJ71 C24 system turns ONIOFF the RS signal according to
the setting of the CD terminal check (see Section 7.1) and the
transmission method (see Section 7.2), as shown below.
Transmls-
slon
Method
Enabled
CD terminal
Check Setting
Disabled
Data transmission from the external device should be done confirm-
ing the RS signal controlled by the AiSJ71C24.
ON
OFF
Half-duplex
(f)
CS signal
State of
the CD
Sianal
When the AtSJ71C24 i s in the ready state,
the AlSJ71 C24 system turns RS signal ON.
The AlSJ71 C24 system turns the RS signal
OFF.
OFF
ON. lnormallv ON)
I
ON
Data is only transmitted from theAlSJ71C24 when this signal is ON.
RS Signal ONIOFF Control
When the AlSJ71C24 is in the ready state,
the AtSJ71C24 system turns the RS signal
I
Enabled
ON
(always set to
enabled)
OFF
(2)
ON/OFF definitions are as follows:
See Section
5.
ON
:
5V to 15 VDC
OFF
:
-5 V to -15 VDC
(3)
Interface connector
The following type of RS-232C connector is used.
Use a matching
connector.
9-pin D-sub (female) screw-fixing type
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