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Terminal A
GRL100
Signal ground
7
P
2
TX1
N
14
P
3
RX1
CH1
N
16
P
15
CK1
N
12
Shield
1
(e) Link via Multiplexer (Electrical Interface
Terminal A
GRL100
Signal ground
7
P
2
TX1
N
14
P
3
CH1
RX1
N
16
P
15
CK1
N
12
Shield
1
Signal ground
7
P
2
TX2
N
14
P
3
CH2
RX2
N
16
P
15
CK2
N
12
Shield
1
(f) Link via Multiplexer for Dual communication
(Electrical Interface in accordance with X.21, RS530)
Figure 2.2.13.3 Communication Circuit Setup in Two-terminal Application (continued)
In case of three-terminal applications, signal terminals CH1-TX1, -RX1 and -CK1 which have
the same function as CH2-TX2, -RX2 and -CK2 are added.
Figure 2.2.13.4 shows the communication circuit arrangement for three-terminal applications.
Note that the CH1 signal terminals TX1, RX1 and CK1 of one terminal are interlinked with the
CH2 signal terminals TX2, RX2 and CK2 of another terminal and that the scheme switch
[TERM] is set to "3-TERM". If the same channel is interlinked between both terminals such as
the CH1 signal terminals of one terminal are interlinked with the CH1 signal terminals of another
terminal, the scheme switch setting [CH. CON] should be set to "Exchange".
The three-terminal line application models can be applied to a two-terminal line. In this case,
same channel's TX, RX and CK of both terminals are interlinked and scheme switch [TERM] is
set to "2-TERM".
The three-terminal models also have dual communication mode as shown in Figure 2.2.13.5.
M
U
X
in accordance with X.21, RS530)
M
U
X
M
U
X
33
6 F 2 S 0 8 5 0
Terminal B
GRL100
Signal ground
7
P
2
TX1
N
14
M
P
U
3
RX1
CH1
X
N
16
P
15
CK1
N
12
Shield
1
Terminal B
GRL100
Signal ground
7
P
2
TX1
N
14
M
P
U
3
RX1
CH1
X
N
16
P
15
CK1
N
12
Shield
1
Signal ground
7
P
2
TX2
N
14
M
P
U
3
RX2
CH2
X
N
16
P
15
CK2
N
12
Shield
1
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