Curtis 1356/1356P CAN Expansion Module Manual,
Rev. A
11
INPUT/OUTPUT SIGNAL SPECIFICATIONS
The input/output signals wired to the 24-pin connector can be grouped by type
as follows; their electrical characteristics are discussed below.
— digital inputs
— driver outputs
— analog inputs with virtual digital input
— encoder inputs
— serial port
— CAN Bus interface
— auxiliary power supplies.
Digital Inputs
The 1356 /1356P has eleven digital inputs. In addition, the two driver outputs
(Input/Output 1 and Input/Output 2) can be programmed as digital inputs (as
long as the drivers are off: i.e., no current, voltage, or PWM output). Each of
these digital inputs has a pull-down resistor to B-. This provides an active high
input (“On” when connected to B+). The side effect of this pull-down resistor is
that there is a small leakage current in the two driver outputs when the output
driver is Off. This leakage can be enough (>2 mA) to light high-efficiency LEDs.
2 — INSTALLATION & WIRING:
I/O Signal Specifications
1
13
12
24
Because Input/Output 1 and Input/Output 2 can also be used as driver
outputs, it is important to ensure that Operation Mode is set appropriately.
When they will be used as digital inputs, the Operation Mode parameter must
be set to 0 = Active High Digital Input (see pages 33 and 45). 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 INPUT SPECIFICATIONS
signal
name
pin
logic
threshold
input
impedance
Input/Output 1 J1-2
All models:
12 – 36V models:
Input/Output 2 J1-14 Low = 1.6 V
about 10 kΩ
Input 3
J1-3
High = 4.0 V
36 – 80V models:
Input 4
J1-15
about 47 kΩ
Input 5
J1-4
Input 6
J1-16
Input 7
J1-5
Input 8
J1-17
Input 9
J1-6
Input 10
J1-18
Input 11
J1-7
Summary of Contents for 1356
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