Hercules-EBX CPU User Manual V1.02
Page 18
Digital Ground
Digital ground (0V - reference); used for digital circuitry only
WDO
Watchdog Timer Output (from Hercules-EBX board)
WDI
Watchdog Timer Input (to Hercules-EBX board)
ACK
Handshaking line used (with DIOLATCH signal) for automated digital
data
transfers
FXA, FXB
These lines should be left unconnected
NOTE: The watchdog timer circuit is described on page 42 of this manual. It may be programmed
directly or with Diamond Systems’ Universal Driver software.
Connector Part Numbers
J8 plug on CPU board:
Phyco
2120-50S
Ribbon Cable Plug:
Standard 2x25 0.1” female ribbon cable header
4.6 Data Acquisition (Analog I/O) Connector – J9 (Models with Data Acquisition Only)
Single-Ended Differential
Vout 0
1
2
Vout 1
Vout 0
1
2
Vout 1
Vout 2
3
4
Vout 3
Vout 2
3
4
Vout 3
Output Ground
5
6
Output Ground
Output Ground
5
6
Output Ground
Vin 0
7
8
Vin 16
Vin 0 +
7
8
Vin 0 -
Vin 1
9
10
Vin 17
Vin 1 +
9
10 Vin 1 -
Vin 2
11
12
Vin 18
Vin 2 +
11 12 Vin 2 -
Vin 3
13
14
Vin 19
Vin 3 +
13 14 Vin 3 -
Vin 4
15
16
Vin 20
Vin 4 +
15 16 Vin 4 -
Vin 5
17
18
Vin 21
Vin 5 +
17 18 Vin 5 -
Vin 6
19
20
Vin 22
Vin 6 +
19 20 Vin 6 -
Vin 7
21
22
Vin 23
Vin 7 +
21 22 Vin 7 -
Vin 8
23
24
Vin 24
Vin 8 +
23 24 Vin 8 -
Vin 9
25
26
Vin 25
Vin 9 +
25 26 Vin 9 -
Vin 10
27
28
Vin 26
Vin 10 +
27 28 Vin 10 -
Vin 11
29
30
Vin 27
Vin 11 +
29 30 Vin 11 -
Vin 12
31
32
Vin 28
Vin 12 +
31 32 Vin 12 -
Vin 13
33
34
Vin 29
Vin 13 +
33 34 Vin 13 -
Vin 14
35
36
Vin 30
Vin 14 +
35 36 Vin 14 -
Vin 15
37
38
Vin 31
Vin 15 +
37 38 Vin 15 -
Input Ground
39
40
Input Ground
Input Ground
39 40 Input Ground
Table 6: J9 – Data Acquisition (Analog I/O) Header Pinout
Signal Name
Definition
Vout3-0
Analog output channels 3 – 0
Output Ground
Analog ground; 0V reference for VOut3 - 0
Vin 31 ~ Vin 0
Analog input channels 31 – 0 in single-ended mode
Vin 15 + ~ Vin 0 +
High side of input channels 15 – 0 in differential mode
Vin 15 - ~ Vin 0 -
Low side of input channels 15 – 0 in differential mode
Input Ground
Analog ground; 0V reference for VIn31 - 0
NOTE: These reference grounds are NOT decoupled from the power grounds – they are
indirectly connected to the power supply input (and other on-board ground/0V references). Do
