Wesley BC-6200-8SA - Manual (Page 34)

28 Curtis 1268 Manual, Rev. D
AUX DRVR MODE
The auxiliary driver mode parameter determines whether the auxiliary function
will be an electromagnetic brake or a WalkAway
™ relay or neither (no auxiliary
function). It is programmable from 0 to 2:
0 auxiliary driver Off
1 external WalkAway relay
2 electromagnetic brake
A WalkAway ™ relay provides an alternative path for the current to the
controller so that it can maintain braking to slow a vehicle that begins to roll
after the main contactor has opened.
An EM brake keeps the vehicle from moving after coming to rest, which
can be very useful when stopping on a hill.
Both options require appropriate hardware. See the wiring diagrams,
pages 8 and 9.
AUX PULL IN
The auxiliary pull-in voltage parameter sets the peak voltage momentarily
applied to the load connected to the aux driver. The pull-in parameter allows
a high initial voltage to be supplied for 0.1 second when the driver first turns
on, to ensure proper closure. Values for this parameter should be determined
from relay/EMB specifications or advice from the device manufacturer.
AUX PULL IN is programmable from 1 to 3, representing these fixed battery
voltage percentages:
1 100% battery voltage
2 60% battery voltage
3 35% battery voltage
AUX HOLDING
The auxiliary holding voltage parameter sets the continuous voltage applied
to the load connected to the aux driver, after the initial 0.1 second pull-in.
AUX HOLDING is programmable from 1 to 3. The driver output is pulse width
modulated at one of three battery voltage percentages:
1 100% battery voltage
2 60% battery voltage
3 35% battery voltage
Using this parameter, the average applied voltage can be reduced so that a coil
that is not rated for the full battery voltage can be used. For example, a relay
coil rated for 24V could be used in a 48V system if
AUX HOLDING is set to 3
(48V * 0.35 = 16.8V), as 16.8V is well above typical dropout voltage. The
3 — PROGRAMMABLE PARAMETERS: Output Driver Parameters
Output Driver Parameters