3 — PROGRAMMABLE PARAMETERS
Curtis Model 1226 – September 2019
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pg. 38
EM Brake Menu
Use the EM Brake menu to congure electromagnetic braking (EM). e following table describes
the menu’s parameters.
Note: For information on the electromagnetic braking feature, see page 38.
EM BRAKE MENU
PARAMETER VALUES DEFAULT DESCRIPTION
Pull In Voltage 20%-100% 100% Sets the electromagnetic braking system’s initial voltage when
the system is rst turned on.
To ensure that the electromagnetic brake is released, the
controller allows a high initial voltage when the electromagnetic
brake turns on. After 1 second, this peak voltage decreases to the
specied Holding Voltage.
Holding Voltage 20%-100% 80% Sets the reduced voltage the controller applies to the brake coil
once the brake has been released.
Set Holding Voltage high enough so that the brake remains
released under all shock and vibration conditions that the vehicle
is expected to encounter.
Note: Use the EM Brake Driver PWM eld to monitor the pull-in
and holding voltages. See page 58.
EM Brake Delay 0-2.0s 1.0s Sets how long it takes for the controller to engage the
electromagnetic brake when the controller output decreases to
0%.
Understanding Electromagnetic Braking
e electromagnetic braking feature works as follows:
• e controller releases the electromagnetic brake when all the following conditions occur:
■ e interlock input is closed.
■ Either the forward or reverse direction is selected.
■ e throttle is above the deadband threshold.
• e controller engages the electromagnetic brake when the controller output is 0%. Output
goes to 0% when either of the following conditions occurs:
■ e controller detects that the vehicle has stopped and the EM Brake Delay timer
has expired.
■ e vehicle is moving in a direction that does not comply with the throttle’s direction.
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