Appendix A — Technical Aspects
37
Digital Input and Output Ports
The digital input port and digital output port are 15-pin connectors
situated on the back panel of the PowerLab. The eight digital input
lines respond to standard TTL signals with a threshold of 2.2 V. The
eight digital output lines can turn on and off, or signal to, up to eight
external TTL devices. The digital output lines are capable of driving
five TTL loads overall (50 mA maximum load per line; 250 mA
maximum total load).
These recording automation and control features are available in the
Macintosh version of Chart, but not in the current version of Chart for
Windows (v3.4), or in Scope.
Pod Connectors
The Pod connectors on the PowerLab/4
SP
are 8-pin DIN connectors.
(The PowerLab/8
SP
and PowerLab/16
SP
have single-ended BNC
inputs only.) Do not attempt to record from both the BNC and Pod
connectors for an input at the same time, or the signals will compete.
Pod connectors allow the connection of ADInstruments Pods —
small, low-cost units that provide alternatives to front-ends for
specific tasks, for use with precalibrated transducers and so on. (Pods
are supported by Scope v3.6.3 and later, Chart for Macintosh v3.6.3
and later, and Chart for Windows v3.4.7 and later.) The Pod
8
1
9
15
IN 2
IN 3
IN 1
IN 5
IN 4
IN 6
IN 7
IN 8
OUT 2
OUT 3
OUT 1
OUT 5
OUT 4
OUT 6
OUT 7
OUT 8
EVENT (2) IN
EVENT (1) IN
EVENT (2) OUT
GROUND
1
8
15
9
GROUND
OUTEVT 2 OUT
OUTEVT 1 OUT
OUTEVT 1 IN
OUTEVT 2 IN
Digital input
Digital output
Figure A–11
The pin assignments for the
digital input and output
connectors
Summary of Contents for PowerLab/16SP
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Page 22: ...14 PowerLab Owner s Guide ...
