Warner Electric PB-120, PB-170, PB-250, PB-400 User Manual
Primary Brakes
PB-120, PB-170, PB-250, PB-400
P-201
819-0480
Installation Instructions
Contents
Mounting
Surface
Magnet
Pilot
Diameters
Installation Instructions
PB-120 PB-170 PB-250 PB-400 . . . . .2-9
Electrical Specifications . . . . . . . . . . . . . . . . . . . .5
Drawings and Parts Breakdown or Exploded Views
PB-120 . . . . . . . . . . . . . . . . . . . . . . . . . .10-11
PB-170 . . . . . . . . . . . . . . . . . . . . . . . . . .12-13
PB-250 . . . . . . . . . . . . . . . . . . . . . . . . . .14-15
PB-400 . . . . . . . . . . . . . . . . . . . . . . . . . .16-17
Warranty . . . . . . . . . . . . . . . . . . . . . . .Back Cover
Follow the installation instructions in this
manual carefully to ensure safe, reliable
operation. All stated or implied manufacturer
warranties are void if this product is not
installed in accordance with these
instructions.
Failure to follow these
instructions may result in product damage,
equipment damage, and serious or fatal injury
to personnel.
Primary Brake
PB-120 PB-170 PB-250 PB-400
The illustration drawings, parts lists, and
exploded views for these units can be found
beginning on page 10.
A. Installing the Conduit Box
To install the conduit box on the size 400 unit,
refer to the instructions supplied with conduit
box.
PB-170
PB-400
B. Mounting the Magnet
The brake magnet is mounted to a stationary
machine member by a flange. Extreme care
must be taken in selecting the location for the
mounting of the magnet. Proper positioning is
very important for the unit to function correctly.
1. A pilot diameter on the mounting surface is
essential to hold the magnet within the
required tolerances (Figure 1).
Figure 1
Warner Electric • 800-825-9050 P-201 • 819-0485
2
Figure 2
2. A machined pilot diameter is provided on the
magnet mounting flange (refer to illustration
drawings page 10-17) to aid in the proper
positioning of the magnet.
Figure 3
3. An optional release spring may be used
with the standard armatures and hubs. The
release spring forces the armature back
against the hub retainer ring when the magnet
coil is de-energized.
3. Once the mounting surface has been
prepared, the magnet is bolted in place with
capscrews and lockwashers. (Figure 2.)
4. After assembly, the magnet must be
concentric and square within the required
tolerances listed on the illustration drawing.
C. Assembling the Armature and Hub
1. The antibacklash armatures are shipped
assembled and ready to be installed. See
Step D.
2. The standard armature and hub must be
assembled before it can be installed.
Assemble the armatures so that the shiny
surfaces (120 and 170) or backing plate sides
(250 and 400) are against the hub retainer
ring (Figure 3).
Follow these instructions to assemble the
armature and hub when the optional release
springs are being used.
Warner Electric • 800-825-9050 P-201 • 819-0485
3
PB-170
Assemble the splined armature to the hub. The
shiny side of the armature should be against the
hub retainer ring.
Assemble the release spring into the groove in the
hub spline. The curved portion of the spring should
be against the armature. (Figure 4)
Figure 4
PB-250
Insert the hub, with snap ring intact, into the armature from the backing plate side. (Figure 5)
PB-400
Insert the release springs into the backing plate
holes of the armature. Bow the springs as
necessary to insert them into the armature.
(Figure 7)
Figure 7
Remove the snap ring from the hub.
Insert the hub, with the setscrew end first, into the
armature from the segmented side. Slide the hub
Figure 5
Insert both release springs into the holes of the
backing plate. Bow the springs as necessary to
into the armature until the release springs engage
the snap ring groove. (Figure 8)
Figure 8
insert them into the armature. (Figure 6)
Figure 6
Figure 9
Warner Electric • 800-825-9050 P-201 • 819-0485
4
Assemble the snap ring into the groove in the
hub, clamping the release spring against the end
of the spline. (Figure 9)
4. Secure the assembly in this position by
alternately tightening the two setscrews in the
hub.
D. Mounting the Armature Assembly
5. The hub will need to be repositioned as wear
1. (250 and 400 units only) Insert a key in the
occurs with time.
keyway of the shaft.
2. Slide the armature assembly onto the shaft.
3. Position the assembly in accordance with
the overall axial dimensions given on the
illustration drawings. For air gap (.015'').
Electrical Specifications
Unit Size PB 120 PB 170
Voltage – DC 6 24 90 6 24 90
Resistance @ 20°C — Ohms 6.32 104 1386 6.96 111.2 1506
Current — Amperes .949 .230 .065 .861 .215 .060
Watts 5.69 5.52 5.85 5.85 5.16 5.37
Coil Build-up — Milliseconds 12 12 11 17 17 16
Coil Decay — Milliseconds 88 78 76
Unit Size PB 250 PB 400
Voltage – DC 6 24 90 6 24 90
Resistance @ 20°C — Ohms 5 76.4 1079 4.88 73 1087
Current — Amperes 1.2 .314 .084 1.23 .322 .083
Watts 7.2 7.5 7.51 7.39 7.96 7.45
Coil Build-up — Milliseconds 48 48 44 154 154 154
Coil Decay — Milliseconds 15 15 13 62 60 55
Notes: Build-up time equals current to approximately 90% of steady state value and flux to 90%.
Decay time equals current to approximately 10% of steady state value and flux to 10%.
Warner Electric • 800-825-9050 P-201 • 819-0485
5
4
10
8
11
9-1
*7
3
6
5
9
9-1
12
2
1
4
Installation Instructions
Conduit box kit No. 5200-101-010 contains all
components needed to assemble a conduit box for
PB400 brake.
When properly installed, this conduit box is
designed to provide a proper means for field wiring
terminations. It conforms to the requirements of
Underwriters Laboratories.
Do not connect rigid conduit
directly to the conduit box. A minimum of 12”
of flexible liquid tight conduit or other suitable
flexible wiring with appropriate fittings is
required. Flexible wiring is required to
prevent side loading of bearing on bearing
mounted clutches and possible deformation
or breakage of the conduit box or
clutch/brake components during assembly.
Step 1
Assemble a customer supplied flexible wiring
connector into desired end of conduit box (3).
Press protective plug (5) into unused conduit hole.
Components
Thread green washer head hex screw (9) into
round hole in base of conduit box. Place terminal
ring (9-1) over screw before inserting.
Snap two wire grommets (6) into square holes in
conduit box base. The grommet crowns should
be toward the outside of the box and the rubber
flanges should be on both sides of the conduit
box.
Push two terminal spacers (7) through rubber
grommets. Number 6 spacers fit in PB400. (See
Figure 10)
Parts List for kit 5200-101-010
Item Quantity Part Name
11Bracket
-21
31Box, Conduit
43Screw, Hex, Washer Head
51Plug, Protective
62Grommet, Wire
*7
2 Spacer No. 8 Thd.
2 Spacer No. 6 Thd.
82Cap terminal
91
Screw, Hex, Washer Head
and Sems Conical Washer
Screw, Hex, Washer Head,
Green
9-1 3 Terminal, Ring
10 1 Cover
11 2 Screw, No. 8 Brass
12 1 Plug, Protective
*The No. 6 spacers are required on Sizes 375, 400 and 475. All
others use No. 8.
Warner Electric • 800-825-9050 P-201 • 819-0485
6
Figure 10
Loading...