Wesley BCT-6200-6SA - Manual (Page 36)

Curtis 1243
GEN
2 Manual, Rev. B 28
The four Electromagnetic Brake parameters—along with the sequencing delay—af-
fect the behavior of the auxiliary driver at Pin 8. This driver is typically used for
an electromagnetic brake, as shown in the basic wiring diagram (Figure 3, page 7).
See Figure 14 for an illustration of the relationship between interlock braking, the
EM brake, and the sequencing, auxiliary, and interlock braking delays.
AUX TYPE
The auxiliary driver type parameter configures the low side driver at Pin 8. The
auxiliary driver can be programmed to operate in any of the configurations (i.e.,
Types 1 through 5) described in Table 3. Types 1 through 4 are various ways of
configuring the driver for an electromagnetic brake; Type 5 is a non-EM-brake
option. If no auxiliary device will be connected to Pin 8, the auxiliary driver
should be programmed to Type 0.
EM BRAKE PWM
The auxiliary driver output (at Pin 8) can be modulated if you are using an
EM brake (or other auxiliary device) whose coil voltage rating is lower than the
battery voltage. If the electromagnetic brake PWM parameter is programmed
On, the brake will pull in at 100% PWM (full current up to 3 amps) for 500
ms and then pull back to 62.5% PWM (≈2 amps max) at a frequency of about
250 Hz and continue at this level until released. If programmed Off, the aux-
iliary driver output will remain steadily at 100% PWM.
AUX DELAY
The auxiliary driver delay parameter allows a delay before the electromagnetic
brake is engaged (Pin 8 driver opened) after the vehicle reaches the neutral state
(throttle in neutral, both direction switches open, motor speed approximately
zero). The Aux Delay is adjustable from 0 to 30 seconds. When set to zero,
there is no delay and the brake is engaged as soon as the vehicle reaches the
neutral state. This parameter does not apply to Aux Type 1 (see Table 3).
For Aux Type 5, the device connected to Pin 8 will be off when the Pin
8 driver is open, and on when the driver is closed. The aux delay could be used
to allow the auxiliary device to keep running for a short while after the vehicle
reaches the neutral state.
INT BRAKE DLY
The interlock brake delay parameter allows a delay before the electromagnetic
brake is engaged after the interlock switch opens; during this time, interlock
braking is in effect. The electromagnetic brake is engaged when the delay has
Electromagnetic Brake Parameters
3 — PROGRAMMABLE PARAMETERS: Electromagnetic Brake Parameters