Links
Throughout this section a + indicates the default link position.
Default Link Positions
There are three functions defined by the links on the APCI-SER4: whether the serial lines are RS232
or RS485/422 (and how some of them are connected); synchronous clock sourcing; and receiver
enabling/disabling.
The first digit of the link number refers to the channel i.e LK13 refers to channel 1. The links define
whether some of the lines connecting to the ESCC for that channel are at RS232 or RS485/422
levels, and in some cases which lines go to the 50-way connector.
Some of the serial lines are not affected by these links. This is either because they have a connection
on the 50-way connector, which is not shared with a different function or level, or because the device
can operate at either level.
RS232/485 and RS422 - Serial Signal Connections
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2192-09100-000-000
J592 APCI-SER4
Link
LK10
Channel
1
1
1
1
2
2
2
2
3
3
3
3
4
4
4
4
Ribbon Cable
Pin No.
9
8
4
7
19
18
14
17
29
28
24
27
39
38
34
37
A+ Position
RS232
DTR
CTS
TX
RTS
DTR
CTS
TX
RTS
DTR
CTS
TX
RTS
DTR
CTS
TX
RTS
B Position
RS485/422
DCD
DTR+
TX+
DTR
DCD
DTR+
TX+
DTR
DCD
DTR+
TX+
DTR
DCD
DTR+
TX+
DTR
LK11
LK12
LK13
LK20
LK21
LK22
LK23
LK30
LK31
LK32
LK33
LK40
LK41
LK42
LK43
