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Curtis 1232E/34E/36E/38E & 1232SE/34SE/36SE Manual, os 30
24 NOVEMBER 2015
2 — INSTALLATION & WIRING: I/O Signal Specifications
INPUT/OUTPUT SIGNAL SPECIFICATIONS
e input/output signals wired to the 35-pin connector can be grouped by type
as follows; their electrical characteristics are discussed below.
— 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.
Digital inputs
ese control lines can be used as digital (on/o) inputs. Normal “on” connection
is direct to B+; “o” is direct to B-. Input will pull low (o) 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.
e remaining lines are digital inputs associated with driver outputs; note
that they have much higher input impedances. e two digital output lines can
also be read as inputs, and are therefore included in this group.
e lines at pins 24 and 8 can also be used as analog inputs, and are
included in that group as well.
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