6
Warner Electric • 800-825-9050
P-273-4-WE • 819-0528
Electrical Connections
To avoid injury (or even death),
always make certain all power is
off before attempting to install or service this
device or any electrical equipment.
Warner Electric UniModules are provided with a
conduit hole threaded for a standard 1/2 inch conduit
connection. Both the clutch and brake lead wires
exit this opening. If a Conduit Box is desired, Warner
Electric Conduit Box Kit, part number: 5370-101-
042, can be purchased separately. The Conduit Box
provides two conduit connection holes for standard
1/2 inch conduit connectors.
UniModule clutches and clutch/brakes operate
on DC voltage. Warner Electric offers a complete
line of electronic controls to meet the needs of
almost any clutch or clutch/brake application. Each
Warner Electric control will show the proper wiring
connections for its use.
Troubleshooting - Electrical
Scan to Watch Clutch & Brake
Electrical Troubleshooting Video
https://p.widencdn.net/byvbde
A UniModule that is not functioning properly may be
caused by other problems. It is best to check for
these problems before replacing it.
A UniModule requires DC power to function. If power
is not reaching the clutch or brake, they will not
engage.
A good practice to follow is to check for power at the
lead wires to the clutch or brake using a voltmeter.
• If power is present in the proper voltage and
current (see Electrical Coil data), then skip ahead
to the Mechanical Troubleshooting section.
• If power is not present, inspect the lead wires for
breaks or cuts.
• If the wires are intact, the problem may be with
the power supply or the switch.
• Using a voltmeter, check to see that proper DC
voltage is leaving the power supply and that the
switch is sending power to the clutch or brake.
• Finally, if there is no power leaving the switch or
power supply, check the incoming AC power to
ensure that it is reaching the power supply.
Electrical Coil Data
Clutch
Brake
Clutch
Brake
Clutch
Brake
Voltage–D.C.
90
90
24
24
6
6
Resistance
UM-50
452
429
31.8
28.8
1.9
1.9
(OHMS)
UM-100/180
392
392
26.7
26.7
1.8
1.8
Current
UM-50
.20
.21
.76
.83
3.2
3.2
(Ampheres)
UM-100/180
.23
.23
.90
.90
3.3
3.3
Power
UM-50
18
19
19
20
20
20
(WATTS)
UM-100/180
21
21
22
22
20
20
Coil Build Up
UM-50
52
53
52
53
52
53
Time (ms)
UM-100/180
72
75
72
75
72
70
Coil Decay
UM-50
6
5
6
5
6
5
Time (ms)
UM-100/180
12
10
12
10
12
10
Troubleshooting - Mechanical
Scan to Watch
Airgap Adjustment Video
https://p.widencdn.net/dg6idh
Both clutch and brake armatures are equipped with
an Autogap™ assembly that maintains the proper
airgap between friction faces through the life of the
product. Each UniModule is airgap adjusted and pre-
burnished at the factory, but the airgaps can shift
as a result of rough handling during shipping and
installation.
An airgap that is too large can prevent the armature
from engaging. An airgap that is too small can cause
the armature to rub continuously, causing higher
running temperatures and decreased wear life.
To reset the airgaps, you will need to access the
armatures. Looking through the vents on either side
of the housing, you will see the fan on the clutch
rotor. Rotate the fan (input) until you see the 1/2 x 1
inch window on the outer periphery of the fan.
