ACQ16 USB Installation Manual
Configuring the System
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9
USB Port Connector
The ACQ16 connects to the host computer via the USB 2.0 connector on the rear of
the unit. The ACQ16 USB port is backward compatible with USB 1.1. However,
only when connected to a USB 2.0 compatible computer, will the ACQ16 USB be
able to download data to the computer at its maximum speed. A USB 1.0 connection
is NOT recommended.
Auxiliary Connector (Preview Feature)
This is a 15 pin male “D” subminiature connector. Below is an illustration of the
connector and pin designations. It allows inputs and outputs of an event signal as
defined by the software protocol.
Pin Signal
Pin Signal
1
Trigger In
9
Event Out
2
Reserved
10
Alarm Out
3
Reserved
11
Timer Out
4
Reserved
12
Reserved
5
Reserved
13
Reserved
6
Reserved
14
Reserved
7
Reserved
15
Ground
8
+5V
Aux. Port pin descriptions
Event Out
- If an event is triggered within P3 Plus, a TTL pulse will appear on this
pin.
Alarm Out
- If an alarm condition occurs, a pulse will appear on this pin. The pulse
is a TTL level pulse that lasts for the duration of the alarm condition. The alarm
condition duration is dependent on the logging rate set. The TTL pulse will last until
a logged line of data is reached where the alarm condition does not occur.
Timer Out
- If a timer reaches its final time, a TTL pulse will appear on this pin.
For a Timer Up configuration, once the timer reaches the set value, the pulse will
execute. For a Timer Down configuration, once the timer reaches zero, the pulse
will execute.
Trigger In
- If this pin is set to 0V, an external event (Event y) will be triggered in
P3 Plus. The recommended time that the pin should be set to 0V is approximately 1
second.
Signal Input
Signal input is accomplished via the sixteen BNC connectors on the front panel of
the Acquisition Interface. The input circuit has a buffered fixed span of ±1.25, ±2.5,
±5, or ±10 Volts full scale. These ranges are selectable using the P3 Plus software.
