4
Warner Electric • 800-825-9050
P-8854-WE • 819-0556
Installation
A. For 115VAC: Connect power supply to
terminals 1 and 2. Insure AC input switch is in
the 115 position. For 230VAC: Connect power
supply to terminals 1 and 2. Insure AC input
switch is in 230 position.
B. A chassis ground should be provided as a non-
current conducting ground wire (color coded
green). Connect this ground to the PC board
screw labeled “Chassis GND.”
C. Switching.
• For switching DC side: switch must be
connected to terminals 3 and 4. Switch
open will allow brake to be engaged. Switch
closed will release the brake. For MCS-
805-2 Only: Switch open will allow brake to
be partially engaged and AC power off will
allow brake to be fully engaged.
• For switching AC side: Line power off will
allow brake to be engaged. Line power on
will release brake. Install a jumper between
terminals 3 and 4.
D. Connect the positive terminal of the brake
to terminal 6 on the control and the negative
terminal of the brake to the terminal 5 on the
control.
Brake Release Adjustment
When setting the MCS-805 control, the objective
is to achieve armature release by adjusting the coil
voltage so it counteracts the permanent magnet to
the maximum extent possible. Proceed as follows:
A. Remove the 3/8” hole plug from the housing
for the release adjust potentiometer. While
holding the potentiometer locking mechanism
with 1/2” wrench, loosen the 7/16” locking
nut on the adjustment potentiometer. Ensure
user connected switch S1 is closed (see
Connections on page 5). Turn on AC power.
Turn the potentiometer adjusting screw (through
access hole in enclosure) to the maximum
counterclockwise position. Slowly turn the
adjustment screw clockwise until the brake
armature disengages from the magnet. If the
usual autogap spring is used, this will normally
cause the armature to separate approximately
1/32” from the magnet. If the autogap is not
used, an external release force of approximately
5-10 pounds should be applied by hand, to
detect the point of armature release. Using a
voltmeter, note and record the voltage at this
point.
B. Turn the adjusting screw to the maximum
clockwise position that will normally cause
the armature to be reengaged. If the armature
does not make contact, it should be physically
moved into contact, with caution exercised to
prevent fingers from being injured.
C. Turn the adjusting screw slowly counterclock-
wise until the armature releases through the
same technique as used under (A). Note and re-
cord the voltage, which will be somewhat higher
than the value noted under (A). Adjust the final
voltage setting to the mid-point between the
two readings.
D. While holding the potentiometer locking
mechanism with 1/2” wrench, tighten the
locking nut with 7/16” wrench. Plug access hole
with 3/8” hole plug previously removed. The
brake is then ready for normal operation.
For MCS-805-2 Only: Set partial engagement
torque using the external potentiometer. Switch
connected to terminals 3 and 4 must be open
to make this adjustment. A setting of 10 gives
maximum torque.
115
230
1 2 3 4 5 6
Release
Adjust
Potentiometer
Locking Nut
Screwdriver
Adjust
Chassis
GND
Fuse:
500 ma
FA
