2 — INSTALLATION AND WIRING
Curtis AC F2-A, F4-A, F6-A Motor Controllers – FOS 4.5 – April 2022 Return to TOC
pg. 26
Power Supply Outputs
The 5-volt and 12-volt power supplies provide auxiliary power for low power circuits such as
electronic throttles, displays/gauges, and motor-position feedback devices. e corresponding ground
is the controller I/O ground circuit, GND. Typically, the 5-volt supply is for the motor feedback device
(encoder or Sin/Cos sensor) as illustrated in the wiring diagrams. For sensors and devices that can
use 12 volts, the available supply current is the same. Use VCL to monitor the output currents for
detecting sensor or vehicle-harness wiring faults. Each supply has parameter adjustable min/max
current thresholds. By default, the 5-volt supply is On (1) and the 12-volt supply is O (0).
Table 12 Power-Supply Outputs Electrical Specifications
Signal Name 23-Pin 35-Pin Output Voltage Output Current
5 Volt Supply 16 26 5 Volts ± 5%
100 mA
1
Measurement Range
2
2 – 105 mA
12 Volt Supply 23 25 12 Volts ± 15%
200 mA
1
Measurement Range
3
0 – 205 mA
VCL Functions VCL Monitor Variables
External_5V_Supply
External_5V_Current
External_12V_Supply
External_12V_Current
1
Total current from both 5V and 12V supplies is 200 mA.
2
Current accuracy.
1mA (2mA - 50mA)
2mA (50 - 100mA)
Initial tolerance at 25°C. Allow +/- 1mA for temperature and aging.
3
Current accuracy = 10mA
Initial tolerance at 25°C. Allow +/- 5mA for temperature and aging.
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