Omega Vehicle Security DAQ-16 - Manual (Page 15)

5 6 7 8
1 2 3 4
J4
Channel 1 gain
Channel 1 select
Channel 0 select
Channel 0 gain
Figure 2-5. Jumper J4 Configuration
Table 2-3 lists configuration options for jumper J4.
connect 4-8
open 4-8 connect 2-6
open 2-6 Gain = 1
Gain = 2
connect 3-7
open 3-7 connect 1-5
open 1-5 Bipolar
Unipolar
Channel 1 Channel 0
Table 2-3. Jumper J4 Configuration
When configured for unipolar operation, the output voltage can be calculated from the
equation:
A = V * * gain
out ref
CODE
4096
For bipolar operation, the equation becomes:
A = - 1 * V * gain
out
CODE
2048
ref
2.3 Digital Input/Output
The DAQ-16 offers four bits of digital output and four bits of digital input for
control/monitoring of external digital devices. The four digital output lines are LS TTL
compatible and will initialize low (0 volts) on power-up. The four digital inputs are also LS
TTL compatible. There is no termination provided on the digital input lines and a read of an
unused digital input will result in an indeterminate value.
DAQ-16 Users Manual 15