Input/Output Signal Specifications - Curtis 1353 User Manual

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INPUT/OUTPUT SIGNAL SPECIFICATIONS

The input/output signals wired to the 23-pin connector can be grouped by type as follows; their
electrical characteristics are discussed below.
• driver outputs
• digital inputs
• analog inputs with virtual digital input
• encoder inputs
• serial port
• auxiliary power supplies
• CANbus interface
Driver Outputs
The 1353 contains nine identical driver outputs. These outputs have all the features necessary to drive
proportional valves as well as many other inductive and non-inductive loads. A variable amount of
dither (fixed frequency command "jitter") can be added to the PWM to prevent proportional valves
from sticking in place.
DRIVER OUTPUT SPECIFICATIONS
1 8
9 15
16 23
Input/Output 9
Input/Output 8
Input/Output 7
Input/Output 6
Input/Output 5
Input/Output 4
Input/Output 3
Input/Output 2
Input/Output 1
The drivers can be set for Constant Current, Constant Voltage, or Direct PWM control mode.
In Constant Current mode, the driver command of 0 to 100% is interpreted as a current from 0 to
Max Output setting (up to 3 amps). Internal current shunts are measured and fed back to a closed
loop PI controller to provide a steady current over changing loads and supply voltages.
In Constant Voltage mode, the driver command of 0 to 100% is interpreted as a voltage from 0 to
Max Output (up to 80 volts). The battery voltage is constantly monitored and fed back to a closed
loop PI controller to provide a steady voltage, compensating for battery droop and discharge. If the
command is higher than the driver can output, the PWM will max out at 100%.
In Direct PWM mode, the driver command of 0 to 100% is directly output on the driver.
2 — INSTALLATION AND WIRING
Signal Name Pin Max Current
15
16
17
18
Each driver:
19
20
21
22
23
Curtis 1353 CANopen Expansion Module Manual – June 2017
Impedance
12 – 36 V models:
3 amps 10 kΩ pulldown to B-
All 9 total: 36 – 80 V models:
18 amps 47 kΩ pulldown to B-
Frequency
All models: 16 kHz
0–100% duty cycle
pg. 11