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
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