2 — INSTALLATION AND WIRING
Curtis AC F2-A, F4-A, F6-A Motor Controllers – FOS 4.5 – April 2022 Return to TOC
pg. 6
Figure 5
AC F4-A dimensions
5X M6X 1.0 - 6H 18 MIN
4X ø 7.0
169.0
180.0
5.5
5.5
129.0
140.0
STATUS LED
74.0
75.0
12.0
Dimensions are in millimeters
Working on electrical systems is potentially dangerous. Protect personnel and property
against uncontrolled operation, high current arcs, outgassing from lead-acid batteries, and
voltage shock hazards.
UNCONTROLLED OPERATION — Some conditions could cause the motor to run out of control.
Disconnect the motor or jack up the vehicle and get the drive wheels off the ground before
attempting any work on the motor control circuitry.
HIGH CURRENT ARCS — Batteries can supply very high power, and arcing can occur if the
terminals are short-circuited. Always open the battery circuit before working on the motor
control circuit. Wear safety glasses, and use properly insulated tools to prevent shorts.
SHOCK HAZARD — The vehicle design (OEMs) shall prevent user access to the battery/protect
controller terminals from a shock hazard, e.g., by mounting them in a compartment or behind a
panel that can only be opened with a tool or a key.
LEAD-ACID BATTERIES — Charging or discharging generates hydrogen gas, which can build
up in and around the batteries. Follow the battery manufacturer’s safety recommendations.
Wear safety glasses when servicing, charging and working around the battery.
LITHIUM ION BATTERIES — Follow the battery manufacturer’s “safety precautions for the Lithium
Ion battery pack.” Wear safety glasses when servicing, charging and working around the battery.
CAUTION
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