The Back Panel - ADInstruments PowerLab/4SP Owner's Manual

Figure 1–5
The back panel of the
PowerLab/4 , PowerLab/8
SP
and PowerLab/16
SP
Chapter 1 — Overview
Trigger
The external trigger connector allows you to use a digital signal level
to synchronise recording to an external event. This input can handle
voltages of up to ±12 V. The threshold voltage (the voltage above
which the trigger circuit activates) is 2.9 volts for the
PowerLabs. When the trigger threshold is crossed, the indicator
beside the external trigger connector will glow yellow. The external
trigger is described in more detail in Appendix A, and the software
documentation covers its practical use in normal recording.

The Back Panel

The PowerLab back panel provides the sockets to connect the
PowerLab to the computer, front-ends, the power outlet, and so on.
This section describes each of the back panel features. The back
panels are the same for all the
SCSI SCSI termination
connector switch
, Not intended for human connection
SP
unless connections marked ap p rop riately
Termination
Serial No:
Serial USB
number connector
The USB Port
The PowerLab can connect to your computer using a USB (universal
serial bus) port, which provides an alternative to the SCSI connection.
This works with USB 1.1-compliant computers with USB connectors
or a USB card. USB needs a Power Macintosh with Mac OS 8.5 or
later, or a PC with Windows 98 or later.
A USB connection is a bit slower than SCSI for data transfer, and so
may limit sampling rates (in Chart) or increase delay times between
sweeps (in Scope), but it is less fussy. You can safely turn on or off, or
disconnect or reconnect, a USB-connected PowerLab while the
series PowerLabs.
SP
SCSI ID Digital Output
switch connector
SCSI ID
Digital Outp ut
2
I C Outp ut Digital Inp ut
OFF
ON
Made b y A DInstruments Pty Ltd, Castle Hill, A ustralia
2
I C Digital Input
connector connector
series
SP
Cooling Power
fan socket
No user-serviceab le p arts inside.
Refer servicing to qualified service p ersonnel.
Do not ob struct fan outlet Rated V oltage:
220-250 V A .C.
50/60 Hz 30 V A
Earth
Fuse Power
holder switch
Fuse Rating:
400 mA - 250 V
(Slow Blow)
Device rating
information
9