Digital Input And Output Ports; Pod Connectors - ADInstruments PowerLab/4SP Owner's Manual

Figure A–11
The pin assignments for the
digital input and output
connectors
Appendix A — Technical Aspects

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).
Digital input
1
9
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
(The PowerLab/8
SP
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
15
and PowerLab/16
SP
Digital output
8
15
are 8-pin DIN connectors.
SP
have single-ended BNC
1
9
37