Total Water
Indexer Bd IDX
Other Components: 'U'

U1 54HC244 DIP20

Pin     Signal      Link To
1    Dig_Gnd(MDP)   U1.10
2    $1N124(IDX)    U8.J18
3    $1N117(IDX)    U8.K18
4    $1N123(IDX)    U8.K17
5    $1N118(IDX)    U8.L18
6    $1N122(IDX)    U8.L17
7    $1N119(IDX)    U8.M18
8    ~INLIMIT_SP4   Z1.8
9    $1N120(IDX)    U8.N18
10   Dig_Gnd(MDP)   U1.19
11   ~OUTLIMIT_SP4  Z1.9
12   $1N121(IDX)    U8.M17
13   ZEROREF_SP4    Z1.7
14   ENABLE_SP4     J1.71
15   KILL_A_SP4     Z1.5
16   DIR_SP4        J1.70
17   KILL_B_SP4     Z1.3
18   STEP_SP4       J1.68
19   Dig_Gnd(MDP)   U2.1
20   +5v(MDP)       U2.20

U2 54HC244 DIP20

Pin     Signal      Link To
1    Dig_Gnd(MDP)   U2.10
2    $1N116(IDX)    U8.B18
3    $1N108(IDX)    U8.C18
4    $1N114(IDX)    U8.D18
5    $1N109(IDX)    U8.E18
6    $1N113(IDX)    U8.F18
7    $1N110(IDX)    U8.G18
8    ~INLIMIT_SP3   Z2.8
9    $1N111(IDX)    U8.H18
10   Dig_Gnd(MDP)   U2.19
11   ~OUTLIMIT_SP3  Z2.9
12   $1N112(IDX)    U8.H17
13   ZEROREF_SP3    Z2.7
14   ENABLE_SP3     J1.58
15   KILL_A_SP3     Z2.5
16   DIR_SP3        J1.57
17   KILL_B_SP3     Z2.3
18   STEP_SP3       J1.55
19   Dig_Gnd(MDP)   U3.1
20   +5v(MDP)       U3.20

U3 54HC244 DIP20

Pin     Signal      Link To
1    Dig_Gnd(MDP)   U3.10
2    $1N99(IDX)     U8.A10
3    $1N107(IDX)    U8.A11
4    $1N101(IDX)    U8.A12
5    $1N106(IDX)    U8.A13
6    $1N102(IDX)    U8.A14
7    $1N105(IDX)    U8.A15
8    ~INLIMIT_SP2   Z3.8
9    $1N104(IDX)    U8.A17
10   Dig_Gnd(MDP)   U3.19
11   ~OUTLIMIT_SP2  Z3.9
12   $1N103(IDX)    U8.A16
13   ZEROREF_SP2    Z3.7
14   ENABLE_SP2     J1.45
15   KILL_A_SP2     Z3.5
16   DIR_SP2        J1.44
17   KILL_B_SP2     Z3.3
18   STEP_SP2       J1.42
19   Dig_Gnd(MDP)   U4.1
20   +5v(MDP)       U4.20

U4 54HC244 DIP20

Pin     Signal      Link To
1    Dig_Gnd(MDP)   U4.10
2    $1N224(IDX)    U8.B3
3    $1N217(IDX)    U8.A3
4    $1N223(IDX)    U8.A4
5    $1N218(IDX)    U8.A5
6    $1N222(IDX)    U8.A6
7    $1N219(IDX)    U8.A7
8    ~INLIMIT_SP1   Z4.8
9    $1N220(IDX)    U8.A9
10   Dig_Gnd(MDP)   U4.19
11   ~OUTLIMIT_SP1  Z4.9
12   $1N221(IDX)    U8.A8
13   ZEROREF_SP1    Z4.7
14   ENABLE_SP1     J1.31
15   KILL_A_SP1     Z4.5
16   DIR_SP1        J1.30
17   KILL_B_SP1     Z4.3
18   STEP_SP1       J1.28
19   Dig_Gnd(MDP)   U5.1
20   +5v(MDP)       U5.20

U5 54HC244 DIP20

Pin      Signal       Link To
1    Dig_Gnd(MDP)     U5.10
2    $1N216(IDX)      U8.H1
3    $1N208(IDX)      U8.H2
4    $1N214(IDX)      U8.G1
5    $1N209(IDX)      U8.F1
6    $1N213(IDX)      U8.E1
7    $1N210(IDX)      U8.D1
8    ~INLIMIT_SCV     Z5.8
9    $1N211(IDX)      U8.B1
10   Dig_Gnd(MDP)     U5.19
11   ~OUTLIMIT_SCV    Z5.9
12   $1N212(IDX)      U8.C1
13   ZEROREF_SCV      Z5.7
14   ENABLE_SCV(MDP)  J1.18
15   KILL_A_SCV(MDP)  Z5.5
16   DIR_SCV(MDP)     J1.17
17   KILL_B_SCV(MDP)  Z5.3
18   STEP_SCV         J1.15
19   Dig_Gnd(MDP)     U6.1
20   +5v(MDP)         U6.20

U6 54HC244 DIP20

Pin     Signal     Link To
1    Dig_Gnd(MDP)  U6.10
2    $1N199(IDX)   U8.P1
3    $1N207(IDX)   U8.N2
4    $1N201(IDX)   U8.N1
5    $1N206(IDX)   U8.M2
6    $1N202(IDX)   U8.M1
7    $1N205(IDX)   U8.L1
8    ~INLIMIT_SV   Z6.8
9    $1N204(IDX)   U8.J1
10   Dig_Gnd(MDP)  U6.19
11   ~OUTLIMIT_SV  Z6.9
12   $1N203(IDX)   U8.K1
13   ZEROREF_SV    Z6.7
14   ENABLE_SV     J1.5
15   KILL_A_SV     Z6.5
16   DIR_SV        J1.4
17   KILL_B_SV     Z6.3
18   STEP_SV       J1.2
19   Dig_Gnd(MDP)  U7.5
20   +5v(MDP)      U7.7

U7 XC17256 XC17256

Pin     Signal     Link To
1    XCHK9(IDX)    U8.U3
2    XCHK6(IDX)    U8.V1
3    XCHK10(IDX)   U8.V18
4    XCHK8(IDX)    U8.U17
5    Dig_Gnd(MDP)  U8.C7
7    +5v(MDP)      U7.8
8    +5v(MDP)      U8.D3

U8 XC4010-5 PG191

Pin       Signal       Link To
A3   $1N217(IDX)       U4.3
A4   $1N223(IDX)       Z4.4
A5   $1N218(IDX)       U4.5
A6   $1N222(IDX)       Z4.6
A7   $1N219(IDX)       U4.7
A8   $1N221(IDX)       U4.12
A9   $1N220(IDX)       U4.9
A10  $1N99(IDX)        Z3.2
A11  $1N107(IDX)       U3.3
A12  $1N101(IDX)       Z3.4
A13  $1N106(IDX)       U3.5
A14  $1N102(IDX)       Z3.6
A15  $1N105(IDX)       U3.7
A16  $1N103(IDX)       U3.12
A17  $1N104(IDX)       U3.9
A18  XCHK1(IDX)        U8.C15
B1   $1N211(IDX)       U5.9
B3   $1N224(IDX)       Z4.2
B18  $1N116(IDX)       Z2.2
C1   $1N212(IDX)       U5.12
C7   Dig_Gnd(MDP)      U8.C12
C12  Dig_Gnd(MDP)      U8.D4
C15  XCHK1(IDX)        U8.C16
C16  XCHK1(IDX)        JTST.1
C18  $1N108(IDX)       U2.3
D1   $1N210(IDX)       U5.7
D3   +5v(MDP)          U8.D10
D4   Dig_Gnd(MDP)      U8.D9
D9   Dig_Gnd(MDP)      U8.D15
D10  +5v(MDP)          U8.D16
D15  Dig_Gnd(MDP)      U8.G3
D16  +5v(MDP)          U8.J4
D18  $1N114(IDX)       Z2.4
E1   $1N213(IDX)       Z5.6
E18  $1N109(IDX)       U2.5
F1   $1N209(IDX)       U5.5
F18  $1N113(IDX)       Z2.6
G1   $1N214(IDX)       Z5.4
G3   Dig_Gnd(MDP)      U8.G16
G16  Dig_Gnd(MDP)      U8.K4
G18  $1N110(IDX)       U2.7
H1   $1N216(IDX)       Z5.2
H2   $1N208(IDX)       U5.3
H17  $1N112(IDX)       U2.12
H18  $1N111(IDX)       U2.9
J1   $1N204(IDX)       U6.9
J4   +5v(MDP)          U8.J15
J15  +5v(MDP)          U8.R4
J16  XCHK12(IDX)       Z7.7
J18  $1N124(IDX)       Z1.2
K1   $1N203(IDX)       U6.12
K4   Dig_Gnd(MDP)      U8.K15
K15  Dig_Gnd(MDP)      U8.M3
K17  $1N123(IDX)       Z1.4
K18  $1N117(IDX)       U1.3
L1   $1N205(IDX)       U6.7
L17  $1N122(IDX)       Z1.6
L18  $1N118(IDX)       U1.5
M1   $1N202(IDX)       Z6.6
M2   $1N206(IDX)       U6.5
M3   Dig_Gnd(MDP)      U8.M16
M16  Dig_Gnd(MDP)      U8.R3
M17  $1N121(IDX)       U1.12
M18  $1N119(IDX)       U1.7
N1   $1N201(IDX)       Z6.4
N2   $1N207(IDX)       U6.3
N16  A_NOT0(IDX)       JSB.1
N18  $1N120(IDX)       U1.9
P1   $1N199(IDX)       Z6.2
P16  A_NOT3(IDX)       JSB.4
P17  A_NOT2(IDX)       JSB.3
P18  A_NOT1(IDX)       JSB.2
R1   JP0(IDX)          JP1.2
R2   JP1(IDX)          JP2.2
R3   Dig_Gnd(MDP)      U8.R9
R4   +5v(MDP)          U8.R10
R9   Dig_Gnd(MDP)      U8.R16
R10  +5v(MDP)          U8.R15
R15  +5v(MDP)          Z1.1
R16  Dig_Gnd(MDP)      U8.T7
R17  A_NOT6(IDX)       JSB.7
R18  A_NOT4(IDX)       JSB.5
T2   EXPINTR_NOT(IDX)  JSB.54
T4   XCHK16(IDX)       Z7.9
T5   XCHK15(IDX)       JTST.15
T7   Dig_Gnd(MDP)      U8.T12
T9   D_NOT15(IDX)      JSB.36
T10  D_NOT8(IDX)       JSB.29
T11  D_NOT6(IDX)       JSB.27
T12  Dig_Gnd(MDP)      C1.2
T15  A_NOT13(IDX)      JSB.14
T16  A_NOT9(IDX)       JSB.10
T17  A_NOT8(IDX)       JSB.9
T18  A_NOT5(IDX)       JSB.6
U1   EXPACK_NOT(IDX)   JSB.56
U3   XCHK9(IDX)        JTST.9
U4   EXPWR_NOT(IDX)    JSB.48
U5   XCHK13(IDX)       JTST.13
U6   XCHK11(IDX)       JTST.11
U7   XCHK5(IDX)        Z7.4
U9   D_NOT13(IDX)      JSB.34
U10  D_NOT11(IDX)      JSB.32
U11  D_NOT7(IDX)       JSB.28
U12  D_NOT4(IDX)       JSB.25
U13  D_NOT2(IDX)       JSB.23
U14  D_NOT0(IDX)       JSB.21
U15  A_NOT14(IDX)      JSB.15
U16  A_NOT11(IDX)      JSB.12
U17  XCHK8(IDX)        Z7.5
U18  A_NOT7(IDX)       JSB.8
V1   XCHK6(IDX)        JTST.6
V2   CMDENBL_NOT(IDX)  JSB.52
V3   CMDSTRB_NOT(IDX)  JSB.50
V4   EXPRD_NOT(IDX)    JSB.46
V5   XCHK14(IDX)       Z7.8
V6   XCHK7(IDX)        JTST.7
V7   XCHK3(IDX)        Z7.3
V8   D_NOT14(IDX)      JSB.35
V9   D_NOT12(IDX)      JSB.33
V10  D_NOT10(IDX)      JSB.31
V11  D_NOT9(IDX)       JSB.30
V12  D_NOT5(IDX)       JSB.26
V13  D_NOT3(IDX)       JSB.24
V14  D_NOT1(IDX)       JSB.22
V15  A_NOT15(IDX)      JSB.16
V16  A_NOT12(IDX)      JSB.13
V17  A_NOT10(IDX)      JSB.11
V18  XCHK10(IDX)       Z7.6
[IDX]

[IDX] [Components] [Connectors] [Signals]

Connector pin assignments by Terry Allen.
Web listings compiled by Norton T. Allen October 22, 1998.

(c)1998 Harvard University Atmospheric Research Project