Curtis 3301T - Input Configurations

3 — INSTALLATION AND WIRING
pg. 27
Return to TOC Curtis Model 3301T Digital Instrumentation – September 2021
BATTERY CONNECTIONS
Connect the battery to the B+ and B– inputs (pins 16 and 15). Curtis recommends that you
include a fuse in the circuit that connects the battery to the B+ input, as shown in Figure 7. The
fuse will protect the power system from external shorts and should be sized according to your
application’s requirements.
KEYSWITCH
e keyswitch input (pin 7) is active high. Connect the keyswitch input to B+ via a keyswitch.
SWITCH 1–5 INPUTS
e switch 1–5 inputs can be congured for various functions. e following table lists the inputs’
pins, functions, and the parameters used to congure the functions:
Switch
Input
Pin Switch
Traction
Fault Code
Hydraulic
Fault Code
Analog Frequency Driver Parameter
1 5 x x x Sender 1 Type
2 13 x x x Sender 2 Type
3 6 x x x Sender 3 Type
4 14 x x x Sender 4 Type
5 8 x x Output Mode
Note: e analog and frequency functions are reserved.
e following sections describe these inputs.
Switch Inputs
e switch 1–4 inputs can be congured as active high (switched to B+) or active low (switched to
B–). Switch input 5 is active high. e switches’ statuses can be used to turn signal icons on or o.
e voltage range of the switch inputs is identical to the B+ operating voltage range. e input signals
must be within the range of threshold voltages listed in the following table:
Threshold Minimum Maximum
Active high 4.0V Maximum B+ voltage
Active low N/A 1.0V