Input/Output Specifications; Digital Inputs - Curtis 1232E Manual

2 — INSTALLATION & WIRING:
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I/O Signal Specifications
INPUT/OUTPUT SIGNAL SPECIFICATIONS
The input/output signals wired to the 35-pin connector can be grouped by type
as follows; their electrical characteristics are discussed below.

Digital inputs

These control lines can be used as digital (on/off) inputs. Normal "on" connection
is direct to B+; "off" is direct to B-. Input will pull low (off) if no connection
is made. All digital inputs are protected against shorts to B+ or B-.
Nine of these lines (Switches 1–8, 16) are designed to pull current to
keep switch contacts clean and prevent leakage paths from causing false signals.
The remaining lines are digital inputs associated with driver outputs; note
that they have much higher input impedances. The two digital output lines can
also be read as inputs, and are therefore included in this group.
The lines at pins 24 and 8 can also be used as analog inputs, and are
included in that group as well.
Curtis 1232E/34E/36E/38E & 1232SE/34SE/36SE Manual,
— digital inputs
— digital and PWM outputs
— analog inputs
— analog output
— power supply outputs
— KSI and coil return inputs
— throttle and brake inputs
— communications port inputs/outputs
— position feedback inputs.
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