Curtis 3301T - MOSFET Driver and CAN Connectivity

3 — INSTALLATION AND WIRING
Curtis Model 3301T Digital Instrumentation – September 2021
Return to TOC
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 fault codes area and the Fault Name screen:
• 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.
Sender Inputs
Switch inputs 1–4 can be used as analog resistive or voltage inputs. e 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.
e 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 oce in your region.
MOSFET Driver
Switch input 5 can be used as a low side MOSFET driver. e continuous output current is limited
to 1A. e driver can be congured for the following output modes:
• Current
• Volt age
• PWM
• Li lockout
In current, voltage, and PWM modes, the PWM frequency is 16 kHz. In li lockout mode, the
MOSFET output indicates on or o. e Output menu contains parameters that congure 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.
e 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 CAN Menu and
CANopen Communications.