USB-2416-4AO User's Guide
Specifications
44
Optional AI-EXP32 expansion module
Use the AI-EXP32 (sold separately) for applications that need additional analog/thermocouple input and digital
I/O channels. See Measurement Computing web site for product details.
The AI-EXP32 expansion port is intended to interface with a USB-2416 series product. Do not try to use any of
the expansion port pins for any other purpose.
Table 38. AI-EXP32 37-pin connector pin out
Do not connect to terminal block pins labeled "NC."
Pin
Signal name
Pin description
1
GND
Analog ground
2
NC
No connect
3
GND
Analog ground
4
NC
No connect
5
GND
Analog ground
6
VCC
+12 V power
7
NC
No connect
8
NC
No connect
9
IM_A2
I/O control signal
10
IM_A1
I/O control signal
11
IM_A0
I/O control signal
12
IMEN10
I/O control signal
13
IMEN9
I/O control signal
14
IMEN8
I/O control signal
15
IMEN7
I/O control signal
16
DIO_LOAD2
I/O control signal
17
DIO_LOAD1
I/O control signal
18
NC
No connect
19
NC
No connect
20
+3.3V_ISO
+3.3 V power
21
GND
Analog ground
22
+5 VA
+5 V analog power
23
+20.5V
+20.5 V power
24
GND
Analog ground
25
-20.5V
-20.5 V power
26
VDD_ISO
+5 V digital power
27
EXTDIO_INT
I/O control signal
28
CM_A3
I/O control signal
29
SM_A1
I/O control signal
30
SM_AO
I/O control signal
31
CM_A2
I/O control signal
32
SCL
Serial I/O control signal
33
SDA
Serial I/O control signal
34
MOSI
Serial I/O control signal
35
SCK
Serial I/O control signal
36
NC
No connect
37
NC
No connect
The multiple-channel throughput rate calculation is based on the following formula:
Maximum throughput =
, where n is the number of channels
