3 — INSTALLATION AND WIRING
Curtis Model 3301T Digital Instrumentation – September 2021
pg. 28
Fault Code Inputs
Switch inputs 3 and 4 can be used to detect fault codes of Curtis DC controllers. Fault information
is displayed in the
and the
• Switch input 3 is for Curtis DC pump controllers such as the 1253 and 1253C models.
• Switch input 4 is for Curtis DC traction controllers such as the 1243 and 1244 models.
Switch inputs 1–4 can be used as analog resistive or voltage inputs. The analog signals can be used
to display data such as temperature, fuel, and tire pressure. Switch inputs 1 and 2 can also be used as
frequency inputs for devices such as speedometers and tachometers.
The analog and frequency functions are reserved. Curtis engineers use these functions to create
custom applications. If you need a custom application, contact your Curtis distributor or the Curtis
sales and support office in your region.
MOSFET Driver
Switch input 5 can be used as a low side MOSFET driver. The continuous output current is limited
to 1A. The driver can be configured for the following output modes:
• Current
• Voltage
• PWM
• Lift lockout
In current, voltage, and PWM modes, the PWM frequency is 16 kHz. In lift lockout mode, the
MOSFET output indicates on or off. The
contains parameters that configure the output.
CAN CONNECTIONS
To connect the 3301T to the CANbus, connect CAN Low and CAN High to pins 3 and 11,
respectively. Use twisted-pair wiring to minimize the likelihood of picking up a voltage bias on only
one signal.
The device contains a 120Ω terminating resistor. To enable the resistor, short pins 4 and 12.
Note: For information on the 3301T’s CAN parameters and features, see
and
.
