EX213, 221, 230 & 233
Page
19
18
17
16
15
37
36
35
34
14
13
12
11
10
32
31
30
29
33
9
8
28
27
7
6
5
25
24
26
Port B7
Port B6
Port B5
Port B4
Port B3
Port B2
Port B1
Port B0
Port A7
Port A6
Port A5
Port A4
Port A3
Port A2
Port A1
4
3
Port A0
SK3-1
23
22
2
1
+5 V
+12 V
21
20
GND
SK3-8
SK3-7
SK3-6
-12 V
SK3-5
SK3-4
-5 V
SK3-3
SK3-2
Port C7
Port C6
Port C5
Port C4
Port C0
Port C1
Port C2
Port C3
Figure 7.2- Digital I/O Distribution 37 way Connector Pin Designation
As inputs of the EX233 and outputs of the EX213, EX221 and EX230
7.3.2
Unused Input Termination
The 37 way distribution connectors PL2, PL3 and PL4 include eight unused pins (3, 28, 29, 31,
32, 34, 35 and 36). These pins are also unused (not connected) on the PCI236 board. Each of
these unused pins is available on a separate cage-clamp terminal of socket SK3 of the EX233,
and joined to the corresponding unused pins of the other distribution connectors as follows.
PL2, PL3 and PL4
pin number
SK3 terminal
number
3
1
28
2
29
3
31
4
32
5
34
6
35
7
36
8
Figure 7.3 - Unused Distribution Connector Pins
This allows for up to eight additional external signals to be distributed from the EX233 on all
three 37-way connectors.
22
