Curtis 1220 Manual, Rev. C
9
Pot Low (pins J1-10, J1-14)
e Command and Feedback Pot Low pins are connected to I/O GND. ey
are not protected against short circuits to B+.
Fault Output (pin J3-1)
e Fault Output has independent supervision via the MCU, and can be used
for power supply of the traction main contactor coil. is output has reverse
polarity protection.
Max output current 1.5 A
Max voltage drop (to KSI) at 1.5 A 2 V
Steering Angle Output (pin J1-12)
is pin will output an analog signal to the traction controller for traction
speed limit.
Analog output range 5 – 9 V ± 10% (2.5 V when not ready)
Max ripple voltage (p-p) 0.2 V
Max output current 5 mA
Programmer connections (J2 connector)
e Curtis programmer plugs into the 4-pin connector, J2.
Rx is the data input connection to/from the programmer.
Input pull down resistance (to B- ground) 5 kΩ ± 10%
Tx is the data input connection to/from the programmer.
Logic Level O:
Min output sink current 2.8 mA
Max output voltage at current < 2.8 mA 0.6 V
Logic Level 1:
Min output source current 0.4 mA
Max output voltage at current < 0.4 mA 3.5 V
2 — INSTALLATION & WIRING: I/O Signal Specifications
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