MA-716A
3. Connection
3-3
(2) Connecting the Communication Cable
Connect the communication cable to the communication connector on the rear
of the MM-122A.
For details, see the operation manual for the MM-122A.
① RS-232C
One MM-122A is connected even when the communication method of the
MM-122A is set to “232Sy” for the setting change or “232Fr” for the
measured-value reading.
② RS-485
Up to thirty-one MM-122As can be connected when the communication
method of the MM-122A is set to “485Sy” for the setting change. When
“485Fr” is set for the measured-value reading, only one MM-122A is
connected.
Host computerMM-122A
RS-232C
１
ＲＸＤ ２
ＴＸＤ ３
４
５
６
７
８
９
１ＣＤ
２ ＲＸＤ
３ ＴＸＤ
４ ＤＴＲ
５ ＧＮＤ
６ ＤＳＲ
７ ＲＴＳ
８ ＣＴＳ
９
MM-122A side
Pin No.
Host computer
side Pin No.
D-Sub 9-pin
Male
D-Sub 9-pin
Female
MM-122A
ID No.1
Host computer
RS-232C/RS-485
conversion adapter
・・・・・・
31 devices max.
MM-122A
ID No.2
MM-122A
ID No.31
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