
2Curtis 1355 CANopen Slave Soft Starter Module Manual, Rev. A
3Protection from short circuits, under/over voltage, and reverse polarity
3Capacitor bank pre-charge circuit prevents arcing
3Field upgradeable firmware
3IP65 sealing
3Externally viewable dual power/status LED clearly flash the fault code
3Serial communication port for Curtis 1311/1313/1314 programmers
31355-X001: three full bridge drivers for linear actuators, typically used to lift/
lower the brush deck and the squeegee and control the detergent delivery pump
31355-X101: six digital inputs; Digital Input 6 can be used as an interlock.
SOFT START MODE
Soft Start mode provides a linear acceleration ramp from 0V to full voltage
(pure DC, no PWM), and linear deceleration from full voltage to 0V. In this
way, it can reduce the starting current of the motor, and also can eectively
mitigate the surging problem of the inertia system when stopping.
PWM MODE
If Soft Start mode is not desired, M1–M5 can drive motors at PWM% within
the 1-hour rating.
PARALLEL MODE (M4/M5) and H-BRIDGE MODE (M1/M2)
e M4 and M5 outputs can be used in parallel to drive a single large motor
load for vacuum. e 1355 uses the parameters of M4 to control the motor.
e M1 and M2 outputs can provide bi-directional motor control by
connecting one motor load in an H-bridge conguration. e 1355 uses the
parameters of M1 to control the motor.
Both Parallel mode and H-Bridge mode can run in either Soft Start mode
or PWM mode.
Familiarity with your Curtis 1355 module will help you install and operate it
properly. We encourage you to read this manual carefully. If you have questions,
please contact the Curtis office nearest you.
1 — OVERVIEW