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4. SETTINGS AND PROCEDURES BEFORE OPERATION
MELSEC-A
(2)
Examples
(a) Connections to a device which can turn the CD terminal signal ON
(for full-/half-duplex transmissions)
AJ71 ti24
Cable Connectit
Signal
Signal Names
Pa-
NMmhpre
r
(b) Connections to a device which cannot turn the CD terminal signal ON
(for full-duplex transmission)
I
m s and
Directions
... .. "..."-."
1) When wired as in step (a) above, disable the RS-232C CD terminal
check.
Computer
Signal Names
2) If the RS-232C CD terminal check function is enabled, wire the
connectors as shown below.
I
AJ71 C24
Cable Connections and
Computer
Signal Directions
Signal Names Pin Numbers
Signal Names
FG
1
-
SD(TXD)
2
RD(RXD)
3
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