TIE AMBITECH SHORT-STOP G User guide

SHORT-STOP
Electronic Motor Brake
Type G
Instructions and Setup Manual

Table of Contents
Table of Contents
Electronic Motor Brake Type G .....................................................................................................................1
1. INTRODUCTION.........................................................................................................................2
2. DESCRIPTION ANDAPPLICATIONS......................................................................................2
3. SAFETY NOTES..........................................................................................................................2
4. LIMITATIONS.............................................................................................................................2
5. RATINGS .....................................................................................................................................2
6. INSTALLATION..........................................................................................................................3
6.1 Mounting.................................................................................................................................3
6.2 Wiring .....................................................................................................................................3
6.3 Interlock Terminals 3 and 4.....................................................................................................3
6.4 Power Wiring .......................................................................................................................... 4
6.4.1 Single Direction, Single Speed.......................................................................................4
6.4.2 Forward and Reverse......................................................................................................4
6.4.3 Wound Rotor Motors......................................................................................................4
6.4.4 Electronic Drives............................................................................................................5
6.4.5 Single Phase....................................................................................................................5
7. OPTIONS......................................................................................................................................5
7.1 Programmable Controller Mode..............................................................................................5
7.2 Option L (45 sec. max. braking time.) ....................................................................................5
7.3 Option S (Higher Torque) .......................................................................................................5
7.4 Option BD / Y (Brake Disable/Timeout) ................................................................................5
7.5 Option D (Dual-voltage operation) ......................................................................................... 5
7.6 Option R (Braking using 3 motor windings)...........................................................................5
7.7 Option P (Braking on Demand)...............................................................................................6
8. ADJUSTMENTS .......................................................................................................................... 6
8.1 Description of the Adjustments...............................................................................................6
8.2 Setting theAdjustments...........................................................................................................6
9. HOW THE SHORT-STOPWORKS............................................................................................6
9.1 Basic Concept..........................................................................................................................6
9.2 Operation.................................................................................................................................7
10. IF YOU HAVE A PROBLEM...................................................................................................... 7
10.1 Preliminary Checks ............................................................................................................... 7
10.2 No Braking When Motor is Turned OFF..............................................................................7
10.4 Before Returning Any Unit for Service:............................................................................... 8
10.3 Motor Will Not Start.............................................................................................................8
11. LIMITED WARRANTY...............................................................................................................8

2
1. INTRODUCTION
The SHORT-STOP electronic motor brake permits rapid
stopping of AC motors by DC injection, creating a station-
ary magnetic field within the motor.
Braking action is smooth, adjustable and frictionless.
Torque and time adjustments permit matching the braking
rate to almost any machine requirement.
The installation of standard units simply involves connec-
tion of six wires to the machine motor starter.
The SHORT-STOP has no effect on normal machine
performance, operation or motor life.
- FEATURES -
[ ] FRICTIONLESS BRAKING
[ ] TORQUE IS FULLY ADJUSTABLE
[ ] NO MECHANICALCONNECTIONS
[ ] INTERNAL FUSES FOR PROTECTION
2. DESCRIPTION ANDAPPLICATIONS
The SHORT-STOP works with all AC motors other than
universal types. Each SHORT-STOP model covers all
motor sizes up to its rating for horsepower and amps.
Standard units are completely satisfactory for most
applications, particularly woodworking and metalworking
machines such as saws, lathes, grinders, sanders, etc.
Other applications are to replace worn-out mechanical
brakes, to minimize maintenance and to provide adjustable
stopping rates. They make retrofitting older machines
easy, since no mechanical connection is required.
Electronic brakes are useful where coasting is either a
production or a safety problem. However, since electronic
brakes require power to operate and do not provide
holding, they cannot be used as "fail-safe" brakes.
3. SAFETY NOTES
LOCK TOOL OR BLADE SECURELY. Saws and
grinders are often fastened with left-hand thread devices,
which tend to loosen when the machine is stopped too
quickly. Use of double nuts, or other positive locking
methods to prevent such loosening. Since braking may be
set to exceed starting torque, test for safe operation during
braking and check locking from time to time.
DON'T TAMPER WITH WIRING OR MAGNETIC
CONTACTOR. Once installed and adjusted, the SHORT-
STOP box cover should be closed securely.
Tampering with the internal parts or manually operating
the magnetic contactor is not only dangerous, but can
cause damage not covered by the warranty.
POWER LINE INTERRUPTION. The SHORT-STOP
uses AC line power to achieve its braking action. Thus a
power failure or disconnect, or the opening of a fuse, will
simply let the motor coast to a stop without braking. Do
not use the SHORT-STOP where failure to provide
braking will be a hazard.
HOLDING AGAINST A LOAD. The SHORT-STOP
cannot be used as a positive brake against overhauling
loads after the motor stops. In such applications, a
positive lock, a pin, or a separate mechanical brake must
be used to provide for holding at rest. Call factory for
information on other models if holding is desired.
4. LIMITATIONS
MOTOR TYPES. The SHORT-STOP will work with all
induction motors, including wound rotor types, and with
all three phase motors. It will work with all single-phase
motors except for DC and universal motors.
MOTOR HEATING. The heat generated during braking
can be considered equivalent to adding another start cycle,
if the TORQUE control is set very high. Therefore, high
cycle operations may require fan cooling.
Although motor heating is rarely a problem, it is
minimized by using the lowest torque setting that gives
acceptable operation.
IT IS UP TO THE USER TO INSURE THAT HIS
MOTOR WILL BE PROTECTED FROM EXCESSIVE
HEAT RISE, WHETHER FROM EXTREMES OF
RUNNING, STARTING OR BRAKING.
POWER OR FUSE FAILURE. Loss of power means loss
of braking, regardless of whether power is disconnected by
a switch, line or internal fuse, circuit breaker, etc. This also
applies to fuses internal to the SHORT-STOP, where the
fuses are intended for the protection of internal
components.
POWER FACTOR CAPACITORS. Power factor capaci-
tors may NOT be used across a LOAD controlled by the
SHORT-STOP. Move any such capacitors to the LINE
side of the starting contactor per NEC Procedures.
DON'T OPEN POWER TO TERMINALS 1 AND 2. If
power is simply removed from the power input terminals
of the SHORT-STOP during braking, the power contactor
will open under load and may damage the SHORT-STOP,
and will not stop the motor.
5. RATINGS
All SHORT-STOP units may usually be used up to the
published ratings of horsepower or current - whichever is

3
STOP OL’s
3
4
M
SHORT-STOP
Terminals
M
Control Transformer
X1
START
X2
START
X2
STOP STOP OL’s
3
4
M
START
SHORT-STOP
Terminals
STOP R OL’s
3
4
F
F
SHORT-STOP
Terminals
Reverse
F
R
R
X1
Forward
X2
less.
Any application requiring frequent or severe braking, or
operation more often than two stops per minute may
require a different model SHORT-STOP.
Applications involving exceptionally high inertia, such as
press flywheels, extractors, etc may require models with
longer than the standard 15-second maximum braking
time.
For information on applications such as these, please
consult the factory or your local sales representative.
All SHORT-STOP units may be used in normal ambient
temperatures. The maximum temperature at the hottest
part of the heat sink should not exceed 50 degrees C.
SHORT-STOP units have internal fuses. These are fast-
acting, semiconductor fuses. They must be replaced with
the same type as originally supplied. THE USE OF
IMPROPER FUSES IN THE SHORT-STOP WILL
VOID THE WARRANTY!!!
6. INSTALLATION
6.1 Mounting
The SHORT-STOP may be mounted in any convenient
location, and in any orientation, although vertical is
preferable. Keep it away from sources of vibration, dust,
dirt and extremes of temperature. Once mounted, it
normally needs no maintenance.
6.2 Wiring
ALL WIRING SHOULD CONFORM WITHNATIONAL
AND LOCAL ELECTRICAL CODES.
Terminals 3 and 4 must be connected IN SERIES with the
motor starting contactor coil(s). This can be done by
putting Terminals 3 and 4 IN SERIES with the motor
overload protection contacts, or IN SERIES with the
control system STOP button.
Figures 6.1 - 6.3 show some typical control systems, with
interlock Terminals 3 and 4 wired appropriately.
Figure 6.1 Single Direction with Control Transformer
Figure 6.2 Multiple Station Control
All wiring to the SHORT-STOP is connected to the termi-
nals provided. In general, the wires connected to Termi-
nals 1, 2, 5 and 6 must be able to carry the full motor
starting and running current.
Wires connected to Terminals 3, 4, S, W, B and Y will
carry control currents only and may be of the same gauge
as the control wires for the motor starting contactor.
6.3 Interlock Terminals 3 and 4
Figure 6.3 Forward / Reverse System
During normal running operation the interlock is closed
and conduction takes place between Terminals 3 and 4.
X1
M
!
DISCONNECT AND LOCK OUT
POWER TO SHORT-STOP TERMI-
NALS 1 AND 2 BEFORE SERVICING
THE SHORT-STOP
!
THIS IS THE MOST IMPORTANT
PART OF THE INSTALLATION. IF
THIS WIRING IS NOT DONE
CORRECTLY, THE WARRANTY IS
VOID.

4
SHORT-STOP
1 2
3 4
5 6
F
See Section
6.3
L1
T1
L2
T2
MOTOR
L3
T3
SHORT-STOP
1 2
3 4
5 6
M
See Section
6.3
L1
T1
L2
T2
MOTOR
L3
T3
During braking, this interlock circuit opens up, to lock out
the motor starting contactor or contactors. If the interlock
is not connected properly, it may be possible to energize
both the run and the brake contactors at the same time, and
damage the SHORT-STOP.
WARNING
Control voltage must not exceed 240 VAC.
Never connect Terminals 3 and 4 across (in parallel with)
the motor starter contactor coil or across the power line!
The motor starter contactor and brake contactor must not
be manually operated when the SHORT-STOP is
connected, as this will blow fuses and damage the unit.
Terminals 3 and 4 are connected to an electronic switch,
and cannot be tested for continuity with an ohmmeter
MANDATORY INTERLOCK TEST
[ ] With Power Off, remove all wires from terminals 1 & 2
[ ] After Terminals 3 and 4 have been connected. Turn
main power ON.
[ ] Try to start motor, using ALL start buttons or controls.
[ ] MOTOR SHOULD NOT START. If it does start, your
wiring is NOT CORRECT. Turn power OFF, revise
wiring, and re-test.
6.4 Power Wiring
Only AFTER the interlock has been correctly connected
and the mandatory test has been passed successfully, the
power wiring may be done.
As shown in the circuit diagrams below and on the typical
wiring diagram inside the SHORT-STOP enclosure, power
conductors (capable of carrying the full motor starting and
running currents) should be connected to Terminals 1, 2, 5
and 6.
For typical power wiring arrangements, see Figures 6.4 to
6.6.
6.4.1 Single Direction, Single Speed
For single direction single speed applications follow the
"Typical Short Stop Installation Wiring" supplied inside
the Short Stop enclosure, or Figure 6.4.1.
Figure 6.4.1 Single Direction, Single Speed
6.4.2 Forward and Reverse
As can be seen from Figure 6.4.2, the power wiring for a
bi-directional system is essentially the same as for the
basic single direction installation.
Please refer back to Section 6.3, however, to insure that
the interlock is connected so as to disable BOTH the
forward and the reverse motor starters during braking.
Braking will take place when stopping from EITHER
direction.
Figure 6.4.2 Forward / Reverse System
6.4.3 Wound Rotor Motors
Wound rotor motors require no special attention, since
they are also induction motors. Any motor wired with the
SHORT-STOP must, of course, be used with a Magnetic
Starter so that the interlock can be wired correctly. Mini-
mum resistance should be connected to the rotor circuit
during braking.
R

5
SHORT-STOP
1 2
3 4
5 6
S W
See Section
6.3
M
M
L1
T1
L2
Electronic
Drive
T2
MOTOR
L3 T3
6.4.4 Electronic Drives
When used with electronic drives such as motor accelera-
tors, solid state starters, variable frequency drives, etc., an
isolating contactor must be installed between the motor
and the electronic drive device to protect the electronic
drive.
The coil of the contactor must be interlocked with Termi-
nals 3 and 4 of the SHORT-STOP; see Figs. 6.1 to 6.3.
Figure 6.4.4 With Electronic Drives
6.4.5 Single Phase
Refer to Fig. 6.4.1 (Single Direction, Single Speed.) Use
L1 & L2, rather than L1 & L3 for the power source.
Note that for a given voltage and horsepower rating, a
single-phase machine will draw greater current than the
three-phase equivalent. Be sure not to exceed either the
horsepower or current rating of the SHORT-STOP.
7. OPTIONS
7.1 Programmable Controller Mode
If your motor starter is controlled by a programmable
controller or other type of solid state switch, or if the
electronic brake does not activate after the motor has been
run, then:
a.Connect Terminals S and W to a dry normally open
(N/O) auxiliary contact on all starter contactors.
b. Set the "ILK SENSE" switch (located to the right of the
brake LED on the control board) to the OFF position.
7.2 Option L (45 sec. max. braking time.)
Maximum braking time is 45 seconds. No additional
wiring or controls involved. (Other braking times are also
available)
7.3 Option S (Higher Torque)
The maximum braking torque is higher than for standard
models. No additional wiring or controls are involved.
7.4 Option BD / Y (Brake Disable/Timeout)
Permits the brake to be disabled for certain purposes, such
as jogging or setup. To use this option, connect a DRY
contact or switch to Terminals B and Y. If the switch or
contact is closed during the run to brake transition, no
brake cycle will follow (motor coasts to a stop). If the
switch or contact is closed during a brake cycle, the brake
cycle will be terminated.
7.5 Option D (Dual-voltage operation)
On "dual-voltage" rated units, permits a single SHORT-
STOP to be used on either 230 OR 460 volts.
7.6 Option R (Braking using 3 motor windings)
May be used to excite all three windings. With this option,
the third motor lead is connected to Terminal 7. All other
connections are made as described for standard units.

6
7.7 Option P (Braking on Demand)
For applications where a braking cycle is not always
needed when stopping the motor, refer to the wiring
diagram in Figure 7.7. This configuration will initiate a
braking cycle only if the braking on demand push-button
is engaged. Otherwise, the motor will coast to rest when
the regular stop push-button is engaged.
Figure 7.7 Braking on Demand
8. ADJUSTMENTS
8.1 Description of theAdjustments
Two adjustment controls are provided within the SHORT-
STOP. These determine the amount of braking power
applied to the motor (TORQUE) and the length of time
this power is applied (TIME).
CAUTION
With high torque settings, this brake can loosen self-
tighten shaft mounted cutting tools.
Be certain that tool arbor is keyed, double nutted, or
locked very tightly.
Test locking mechanism for secure operation periodically.
These controls are single turn potentiometers, which can
be set by means of a small screwdriver (An insulated
screwdriver is recommended). Both controls are at their
minimum when turned fully counter clockwise.
DO NOT FORCE THE ADJUSTMENT PAST
THE END STOPS!
Once set for a particular application, the controls should
not have to be re-adjusted.
A red LED indicator on the circuit board is illuminated
during braking.
8.2 Setting theAdjustments
(1 ) Set TIME control (located on the logic board, to the
left of the brake LED) to mid-range
(2) Set TORQUE control (located on the phase-shift
board, below the fuses) to minimum (Full counter
clockwise)
(3) Turn main power ON
(4) Turn motor ON. After full speed is reached, turn motor
OFF
(5) Adjust TORQUE control in 1/8 turn steps to reach
desired safe braking rate. Braking action is indicated
by a slight hum of the motor.
(6) Adjust TIME control so that braking hum stops (and
LED goes out) about one second after motor stops.
(7) Repeat steps 4 to 6 above, until a satisfactory stopping
time is reached. The maximum tolerable stopping time
should be used.
CAUTION
AS THE MOTOR HEATS UP, THE WINDING
RESISTANCE WILL INCREASE. THIS MAY
REQUIRE A LONGER APPLICATION OF THE
BRAKING CURRENT. THEREFORE, SET THE TIME
CONTROL EITHER WITH THE MOTOR HOT, OR SO
AS TO "HANG ON" FOR ABOUT A SECOND AFTER
STOPPING A COLD MOTOR.
Applying the brake for a longer time than necessary
serves only to increase motor heating.
9. HOW THE SHORT-STOPWORKS
9.1 Basic Concept
The principle used by the SHORT-STOP is the injection of
a controlled amount of DC (Direct Current) into an AC
motor to achieve braking. The effect in stopping can be
considered completely equivalent to that at motor startup.
The DC current in the motor stator sets up a stationary
magnetic field in which the rotor is turning. The
Control
Transformer
X1
X2
BRAKING ON START
STOP DEMAND
OL's
3 4
M
SHORT-STOP
Terminals
M
B
SHORT-STOP
PCBoard
Terminals
Y

7
interaction between the rotor and the magnetic field tries to
align the rotor with the field. Thus, the SHORT-STOP
actually drives the rotor to zero speed.
A further feature is that the retarding torque is proportional
to the field strength, and hence to the braking current. By
varying the braking current, the braking strength can be set
to any desired value.
9.2 Operation
When any START button is depressed, the motor will start
instantly, provided a brake cycle is not in progress.
Starting the motor primes the brake.
When the STOP button is depressed and the starter
contactor is released, the SHORT-STOP will begin
braking the motor, after a short delay.
The length of the brake cycle is determined by the Time
control, and the amount of braking is determined by the
Torque control.
If Terminals B and Y are closed during a run to brake
transition, the brake will not activate and the motor will
coast to a stop.
10. IF YOU HAVE A PROBLEM
10.1 Preliminary Checks
No adjustments are provided or required other than those
described in Section 8.
Should a system fail to perform properly, be sure to check
the wiring first. Also, be certain that the power line
voltage is present and correct. For instance, there should be
equal voltages between any two leads of a three-phase
power line, and these should be in the correct nominal
range for the SHORT-STOP.
If the system has previously been operating properly, it is
also a good idea to check fuses, and that the adjustments of
the two controls - TIME and TORQUE - have not been
tampered with.
If there is a problem on initial installation, or if the brake
should fail to function properly, the following checks
should be made:
[A] Check that TIME and TORQUE controls are set
properly, and are not at minimum.
[B] Verify that the SHORT-STOP rated motor voltage is
present at Terminals 5 and 6 WHEN THE MOTOR
RUNS. If there is NO voltage at 5 and 6 with the
motor running, the unit is installed incorrectly.
[C] Verify that there is normal line voltage (SHORT-
STOP rated voltage) across Terminals 1 and 2, and
that there is AC voltage at the output of the control
transformer in the SHORT-STOP if one is present.
(Lack of voltage at these places may indicate a blown
line fuse, etc.)
[D] If you do not have a programmable controller
operating your motor starter contactor, verify that the
"ILK SENSE" switch (located to the right of the brake
LED on the control board) is in the ON position.
[E] If you have a programmable controller operating your
motor starter contactor, refer to section 7.1
Note that 230-volt units operated from 208 volts will
produce somewhat lower torque. Consult the factory if
this is a problem.
If the power line fuses blow at high torque settings, the
brake should be removed from the motor power line, and
operated from a separate disconnect fused at the same
rating as the motor.
10.2 No Braking When Motor is Turned OFF.
[ ] First, verify that the unit is installed and wired
correctly.
[ ] Next, check that the TIME and TORQUE adjustments
are not set too low.
[ ] Check for blown fuses in the supply line and in the
SHORT-STOP.
Possible reasons for blown fuses are:
[ ] Interlock not operating properly - the most likely cause
is that it is wired wrong, OR NOT AT ALL!
[ ] Overloading of the SHORT-STOP. Replace fuses, and
try operating at lower braking torque. If fuses do not
blow until torque is turned up, the SHORT-STOP
chosen was probably too small for the application.
[ ] Power factor capacitors, if used, MUST NOT be across
the load

8
10.4 Before Returning Any Unit for Service:
CAUTION
Fuses in the SHORT-STOP are designed to protect the
internal components. They are of a special fast-acting
semiconductor-protecting type, and MUST be replaced
with the same type of equal or lower current rating.
THE USE OF INCORRECT REPLACEMENT FUSES
WILL VOID THE WARRANTY, AND MAY RESULT
IN FURTHER DAMAGE TO THE EQUIPMENT.
If there is still a problem, internal trouble is indicated and
the unit should be returned to the factory for service.
BEFORE RETURNING ANY UNIT TO THE
FACTORY, be sure to make the observations and to
follow the requirements of Section 10 4
10.3 Motor Will Not Start
When SHORT-STOP is connected.
[ ] This is usually due to an open interlock (Terminals 3 &
4). NOTE: The INTERLOCK requires power be
applied to the Terminals 1 and 2 to operate, and cannot
be checked for continuity with an ohmmeter.
See Section 10.1-C.
(1) Measure and document the voltage across Terminals
1, 2, 5 and 6.
(2) Document the motor operating voltage, current and
horsepower.
(3) REQUEST PERMISSION FOR THE RETURN,
specifying all the above, plus the type of application or
use, and the number of phases involved. Be sure to
supply the unit Serial Number, Model Number, and to
list all options provided.
(4) PACK THE UNIT CAREFULLY, so that there will be
no further damage during shipment.
(5) Be sure to include your name, address, telephone
number, and the address to which the repaired unit is to
be sent.
(6) When returning any unit include a brief description of
the difficulty you are having, as well as any tests you
have made on it.
(7) Collect shipments will not be accepted.
11. LIMITED WARRANTY
Each SHORT-STOP is warranted by the factory for one year to be free from defects in materials and workmanship. Repairs
will be made at the factory, on products that are returned postpaid to the factory after permission or authorization for return
is granted.
The warranty is VOID if the unit has been tampered with without express permission: if fuses of an incorrect type or rating
have been used; if power has been incorrectly applied to the interlock Terminals 3 and 4, or for any other type of mis-use.
Aside from the above statement of warranty, TIE Industrial, its agents, employees, dealers and distributors assume NO
LIABILITY, AND SPECIFICALLY ASSUME NO LIABILITY FOR ANY CONSEQUENTIAL
DAMAGE due to malfunction, failure to function, improper application, or improper operation of these products.
No allowance can be made for removal or installation costs, machine downtime, transportation, etc.
THE USER ASSUMES FULL APPLICATIONS RESPONSIBILITY.