7.16
SUAA Universal Analog Terminal Board
The SUAA terminal board is a simplex universal analog I/O board that
provides 48 terminals, grouped in threes to provide 16 channels or IO
points. There are four additional screws (49, 50, 51, and 52) that provide a
grounding option for special-case I/O pack-powered 4–wire field device
applications. A single YUAA I/O pack mounts to the terminal board,
using two screws. SUAA provides local cold junction sensing at the
terminal block (two local cold junctions). The pack-supplied power from
the terminals to the field devices is a current-limited 24 V supply.
The terminal blocks are removable on a per channel basis because of how
the points are grouped together as PWR_RTN, IO+, and IO- respectively.
For example, screws 1, 3, 5 provide channel 1, with screw 1 = PWR_RTN,
screw 2 = IO+, and screw 3 = IO-.
Although this screw and channel assignment continues for the remaining
screws and channels, there are certain modes where power is supplied
from the IO+ screw, or where power is supplied at the device itself (in
either case the first screw in the series is not used).
SUAA Terminal Board Screw Definitions
Screw
Name
Channel
Screw
Name
Channel
2
PWR_RTN
2
1
PWR_RTN
1
4
IO+
2
3
IO+
1
6
IO-
2
5
IO-
1
8
PWR_RTN
4
7
PWR_RTN
3
10
IO+
4
9
IO+
3
12
IO-
4
11
IO-
3
14
PWR_RTN
6
13
PWR_RTN
5
16
IO+
6
15
IO+
5
18
IO-
6
17
IO-
5
20
PWR_RTN
8
19
PWR_RTN
7
22
IO+
8
21
IO+
7
24
IO-
8
23
IO-
7
26
PWR_RTN
10
25
PWR_RTN
9
28
IO+
10
27
IO+
9
30
IO-
10
29
IO-
9
32
PWR_RTN
12
31
PWR_RTN
11
34
IO+
12
33
IO+
11
36
IO-
12
35
IO-
11
38
PWR_RTN
14
37
PWR_RTN
13
40
IO+
14
39
IO+
13
42
IO-
14
41
IO-
13
44
PWR_RTN
16
43
PWR_RTN
15
46
IO+
16
45
IO+
15
48
IO-
16
47
IO-
15
50
COM
49
COM
52
COM
51
COM
YUAA Universal I/O Modules
GEH-6855_Vol_II System Guide 225
Public Information