Curtis 1352 - Signal Specifications and Configuration

Curtis 1352 eXm Manual, R ev. D
10
INPUT/OUTPUT SIGNAL SPECIFICATIONS
The input/output signals wired to the 14-pin connector can be grouped by
type as follows; their electrical characteristics are discussed below.
— digital inputs
— digital outputs
— analog inputs with virtual digital input
— power
— communication lines.
Digital inputs
The six digital I/O 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.
2 — INSTALLATION & WIRING: I/O Signal Specications
Because these six lines can also be used as driver outputs, it is important
to ensure that Output Driver Mode is set appropriately for each line. For each
pin that will be used as a digital input, Output Driver Mode must be set to
Input Only (see page 26). Otherwise, a direct short from the battery through
the internal driver FET will occur when the input is switched high and the
FET is turned on.
Digital outputs
The six digital I/O lines can also be used as outputs. They can be either digital
(on/off) or Pulse Width Modulated (PWM) outputs. Each driver is active low,
meaning the output will pull low (to B–) when On. The PWM is at a fixed
frequency (16 kHz), and can vary duty cycle from 0 to 100%.
DIGITAL INPUT SPECIFICATIONS
logic
input protected esd
signal name pin thresholds
* impedance* voltage range tolerance
Input/Output 1 11 All models: 12–36V models: 12–36V models: All models:
Input/Output 2 12
Low = 2.8 V about 10 kΩ -0.5 to 50 V ±8 kV (air
Input/Output 3 13
High = 6.3 V
36–80V models: 36–80V models:
discharge)
Input/Output 4 14
about 47 kΩ -0.5 to 105 V
Input/Output 5 9
Input/Output 6 10
* Tolerance ±5%.
DIGITAL OUTPUT SPECIFICATIONS
pwm &
output protected esd
signal name pin frequency
current* voltage range tolerance
Input/Output 1 11 All models: All models: 12–36V models: All models:
Input/Output 2 12
0–100% Sink 3 A -0.5 to 50 V ±8 kV (air
Input/Output 3 13
duty cycle
36–80V models:
discharge)
Input/Output 4 14
at 16 kHz
-0.5 to 105 V
Input/Output 5 9
Input/Output 6 10
* Tolerance ±5%.
51
1410
6 9
51
1410
6 9