1 340XRi / 680XRi / 1220XRi Applications
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K340XRi, K680XRi, K1220XRi
Application manual.
w w w .EDUGDF. c o m
K340XRi / K680XRi / K1220XRi Applications 2
www.bardac.com
NOTE. These instructions do not purport to cover all details or variations in equipment, or to provide for every possible
contingency to be met in connection with installation, operation, or maintenance. Should further information be
desired or should particular problems arise which are not covered sufficiently for the purchaser's purposes, the matter
should be referred to the local Supplier sales office. The contents of this document shall not become part of or modify
any prior or existing agreement, commitment, or relationship. The sales contract contains the entire obligation of
Bardac Drives. The warranty contained in the contract between the parties is the sole warranty of Bardac Drives.
tatements contained herein do not create new warranties or modify the existing warranty.
Any s
LTH A
HEA
Electrical devices can constitute a safety hazard. It is the responsibility of the user to ensure the compliance of the
installation with any acts or bylaws in force. Only skilled personnel should install and maintain this equipment. If in
doubt refer to the supplier.
ND SAFETY AT WORK
Note. The contents of this document are believed to be accurate at the time of printing. The manufacturers,
however, reserve the right to change the content and product specification without notice. No liability is accepted for
omissions or errors. No liability is accepted for the installation or fitness for purpose or application of the .340Xri /
.680Xri / .1220XRi motor drive units.
1 Table of contents
1 Table of contents ....................................................................................... 2
2 K340XRi Block Diagram and terminal listing. ........................................................ 3
3 Typical applications..................................................................................... 8
3.1 ON OFF switch with Forward / Stop / Reverse switch ............................................................ 8
3.2 Forward / Reverse using pushbuttons ................................................................................ 9
3.3 Method for fast stopping and zero speed quench ................................................................ 10
3.4 Zero reference interlock and Stop / Start pushbuttons. ....................................................... 11
3.5 Using an external 4-20mA speed signal ............................................................................ 12
3.6 Torque control ........................................................................................................... 13
3.7 Load sharing slave single direction. ................................................................................. 14
3.8 Low voltage speed feedback .......................................................................................... 15
Bardac Corporation
40 Log Canoe Circle
Stevensville, MD 21666 USA
Phone: (410)604-3400 Fax: (410)604-3500
K340XRi / K680XRi / K1220XRi Applications 3
PB+ Terminal 7
PB- Terminal 8
Input T6 to output T4 mode
Closed to Common
Open circuit
Invert (+/-10.5V range)
Closed to Common
Closed to Common
Remains in prevailing mode.
Powers up in invert mode.
Open circuit
Closed to Common
Non-invert (0 to +10.5V range)
Open circuit
Open circuit
Invert (+/-10.5V range)
+10V
Min
IP
OP+/-
COM
IP+/-
PB+
PB-
RUN
COM
Tach
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
RLOP
RLIP
OVLD
TRIP
ROP
DEM
SOP
IOP
SPD
TRQ
L N F+
F -
A-
A+
Invert
Non-invert
OP IP
5
K
Up / Down Ramp
OP on T16. ROP
Speed P+I error
amplifier with
stability preset.
Output provides
current demand.
Arm Amps
Isolation
Amplifier.
IOP on T19
Max Current
Preset
Total speed
demand DEM
on T17 (-ve)
Speed Output
SOP on T18
Arm Volts
Isolation
Amplifier
X 2
30 Sec Stall timer
with logic outputs
TRIP on T15 and
Overload on T14
Current
Demand
Clamp.
0 - 5V on
T21 =
0 -100%
+12V
Centre zero comparator with window
threshold from +/-50mV to +/-10.5V
Goes high on T12 (0-10V. 10mA) if
+/- signal input T13 exceeds window.
+12V
.1
M
12
K
Current P+I error
amp with phase
angle controlled
anti-parallel
bridge.
AC 240V or 110V
Field coil
Armature.
For armatures
with a time
constant of
less than 5mS
a DC choke
must be wired
in series.
AC supply must be
semi-conductor fused.
2 K340XRi Block Diagram and terminal listing.
K340/680/1220 XRi
1 +10V output. 10mA max. (Use a 10K Ohm pot for external speed reference).
2 MIN SPEED. (Bottom end of external pot. 5K Ohms preset to common).
3 IP. Speed input. 0 to +/-10V speed input from pot wiper. 47K internal pull down.
4 OP+/-. +/-10.5V range. Input from T6. Invert with pushbutton input T8 open. Non-invert
with pushbutton input T7. 10mA max. (May be used as +/- 10V ref)
5 COM. Common. (0 Volts)
6 IP+/-. Input to pushbutton controlled +/- signal channel. OP on T4. 50K Ohms impedance
for invert mode, 10M input impedance in non-invert mode.
Note. This channel can invert input signals in the range +/-10.5V. It can also buffer (i.e.
non-invert) signals in the range 0V to +10.5V. (It cannot buffer negative signals. If you try
to buffer a negative signal the output will be positive).
Note. If using a high resistance external pot for positive signals e.g. greater than 20KOhms,
then this channel can be used to buffer it using the non-invert mode.
7 PB+ Pushbutton input. 47K Ohm pull up to +12V. Connect to T5 COM. Latches T4 to buffer
(non-invert) positive T6 signals when opened, provided T8 PB- is connected to T5 COM.
8 PB- Pushbutton input. 47K Ohm pull up to +12V. Connect to T5 COM. Latches T4 to invert
T6 when opened. T7 PB+ may be open or connected to T5 COM.
See truth table below for T7 and T8 operation. See terminal 6 IP+/- for notes.
a) Hence if PB+ Terminal 7 remains open then a switch on PB- Terminal 8 can be
used to change modes.
K340XRi / K680XRi / K1220XRi Applications 4
Output voltage
Typical current limit available
Typical Load resistance
10.5V
1mA
Greater than 10K Ohms
10.0V
10 mA
1000 Ohms
9.5V
15 mA
633 Ohms
9.0V
20 mA
450 Ohms
8.5V
25mA
340 Ohms
8.0V
30mA
267 Ohms
Below 8V
30 mA
Less than 267 Ohms
b) If both PB+ Terminal 7 and PB- Terminal 8 remain open then the invert mode is
established.
c) If both PB+ Terminal 7 and PB- Terminal 8 are connected to common then the desired
mode can be established by momentarily opening PB+ Terminal 7 for non-invert, or PB-
Terminal 8 for invert mode. The mode remains latched when the common connection is
re-established. This is useful for end of travel reversal. To implement, connect T1 +10V
to T6 IP+/- and use the T4 OP+/- as the reference to the external max speed pot. Then
connect the normally closed contacts from microswitches on the track, to the pushbutton
inputs T7 PB+ and T8 PB- such that when the load reaches and opens the microswitch it
toggles the reference in the opposite direction.
9 RUN. Internal 12K pull up to +12V. Open to stop, close to COMMON to run. WARNING.
RUN is an electronic inhibit function. The field remains energised, and all power
terminals ‘live’. RUN must not be relied on to ensure the machine is stationary during
hazardous operations. Remove the power source to the system.
Opening T9 RUN will cause immediate drive inhibit and hence if the motor is
rotating at the time it will coast to zero speed.
10 COM. Common. (0 Volts)
11 TACH input. The tach must be opposite polarity to speed input. 1.5 MOhms.
12 RLOP. Relay driver. +10.5V active high. Flywheel diode to COM.
Note. The output is current limited. When in current limit, the output voltage achieved,
depends on the resistance of the load multiplied by the available current limit at that
voltage, according to the table below.
When driving relays, ensure the coil operating range is suitable. E. g. a 12V relay with a
coil operating range of 80-110% will energise at voltages of 9.6V and above (80% of 12V).
Hence it must have coil resistance greater than 633 Ohms for the output to be capable of
achieving the desired voltage. (See table above).
K340XRi / K680XRi / K1220XRi Applications 5
Flywheel diode,
47K resistor and
47nF capacitor
LM324
+12V
Output
termina
This diode allows
relay outputs to
be OR'd together
if desired,
LM324
+12V
T12
RLOP
Flywheel diode,
47K resistor and
47nF capacitor
LM324
+12V
-
+
-
+
invert
10.5V
T13
RLIP
Level preset range
0.5% to 105%
Diagram of relay driver output stage
13 RLIP. Relay driver input. Accepts 0 to +/- 10.5V signal inputs. The threshold to activate
the relay driver is symmetrical around zero, and set by the RELAY preset between +/-
0.05V and +/-10.5V. When the T13 input exceeds the positive or negative threshold, then
the T12 RELAY DRIVER OUTPUT is turned ON. Typical uses include zero speed detector,
zero current detector, stall detector etc.. The input will accept any output
provided on other control terminals. 50K Ohm pull down to common.
K340XRi / K680XRi / K1220XRi Applications 6
14 OVLD. Overload. This output goes high (+10.5V) if the current demand exceeds 100% and
the stall timer starts timing. Flywheel diode to COM. See T12 RLOP for details of the
output drive capability and configuration.
Note. It stays high if the overload subsequently results in a stall trip condition.
The stall timer will allow 150% motor current for approximately 30 seconds before
tripping. The overload integrator can tolerate 50% overload x 30 secs = 1500 units. (A 50%
overload is 150% of motor current set on Imax)
Available overload time prior to trip = 1500 / Overload % in seconds
Examples.
Other overload times 125% Imax current for 60 secs (1500 / 25 =60)
112.5% Imax current for 120 secs. (1500 / 12.5 =120)
For the overload capability to be fully restored after an overload that has not resulted in
a trip, the load must require an equivalent overload current% x time below the 100%
motor current rating.
E.g. If the load stayed at 150% for 15 seconds, then returned to 100% the overload
integrator has used up half of its available units. To reset the integrator to zero again
the load would have to run at say 50% for 15 seconds, or 99% for 750 seconds for
example.
Note. The 100% level for the stall timer is set automatically by the Imax preset.
The stall lamp will get progressively brighter as the stall timer integrates. It will be
completely extinguished when the stall timer integrator is empty. I.e. Full overload
capability available.
Note. The stall timer is actuated by current demand exceeding 100% when the desired
speed remains unsatisfied. E.g. Excess load, insufficient supply volts, loss of feedback,
saturated feedback, insufficient torque, jammed shaft. This allows the protection to be
more comprehensive than overcurrent alone.
15 TRIP. This output goes high (+10.5V) and latches high when the stall timer has timed out
(in which case T14 OVLD will also be high) OR if the fan alarm has operated (in which
case T14 OVLD will be low). Flywheel diode to COM. See T12 RLOP for details of the
output drive capability and configuration.
16 ROP. Ramp output. 0 to +/-10V output for 0 to +/-10V input. 1K Ohm output impedance.
17 DEM. Demand output. 0 to -/+10V output for 0 to +/-100% speed demand. 1K Ohm output
impedance. Represents the inverted total speed demand.
18 SOP. Speed output. 0 to +/-5V output for 0 to +/-100% speed feedback. 1K Ohm output
impedance.
NOTE: Prior to LA issue 11 (see side of terminal block), the output at this terminal was 0
to +/-10V.
19 IOP. Current output. 0 to +/-5V output for 0 to +/-100% armature current. Maximum
output +/-7.5V for +/-150% current. 1K Ohm output impedance.
20 SPD. Auxiliary speed input. Added to main input. Input impedance 100K. 0 to +/-10V
input for 0 to +/-100% speed demand, direct input fast response.
21 TRQ. Torque input. 100K Ohms pull up to +12V.
0 to +5V input for 0 to +/-100% current demand. This input acts as a clamp on the
current demand produced by the speed loop. Hence the speed loop current demand
polarity determines the sign of the current, and this input clamps the amplitude. Also if
K340XRi / K680XRi / K1220XRi Applications 7
the speed loop current demand falls below the input clamp level then the speed loop has
priority. For the clamp to operate, the speed loop current demand must be arranged to
exceed the clamp level by ensuring the speed demand is high enough.
A+ Motor armature + Form Factor typically 1.5
A- Motor armature F- Motor Field – (No connection required for permanent magnet motors).
F+ Motor Field +(For half wave field volts 0.45 X AC, connect field to F- and N).
N AC supply. 110V AC or 240V AC +/-10%, 50–60 Hz.
L AC supply. 110V AC or 240V AC +/-10%, 50–60 Hz.
K340XRi / K680XRi / K1220XRi Applications 8
+10V
Min
IP
OP+/-
COM
IP+/-
PB+
PB-
RUN
COM
Tach
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
RLOP
RLIP
OVLD
TRIP
ROP
DEM
SOP
IOP
SPD
TRQ
L N F+
F -
A-
A+
Invert
Non-invert
OP IP
5
K
Up / Down Ramp
OP on T16. ROP
Speed P+I error
amplifier with
stability preset.
Output provides
current demand.
Arm Amps
Isolation
Amplifier.
IOP on T19
Max Current
Preset
Total speed
demand DEM
on T17 (-ve)
Speed Output
SOP on T18
Arm Volts
Isolation
Amplifier
X 2
30 Sec Stall timer
with logic outputs
TRIP on T15 and
Overload on T14
Current
Demand
Clamp.
0 - 5V on
T21 =
0 -100%
+12V
Centre zero comparator with window
threshold from +/-50mV to +/-10.5V
Goes high on T12 (0-10V. 10mA) if
+/- signal input T13 exceeds window.
+12V
.1
M
12
K
Current P+I error
amp with phase
angle controlled
anti-parallel
bridge.
AC 240V or 110V
Field coil
Armature.
For armatures
with a time
constant of
less than 5mS
a DC choke
must be wired
in series.
AC supply must be
semi-conductor fused.
Acw
10K
Pot
Cw
Forward / Reverse
/ Stop. Centre off
change-over switch
RUN switch. Close
to COMMON. Open
for coast to STOP.
Optional bi-polar
TACH for speed
feedback.
Optional bi-polar
speed indicator.
+/-5V = 100%
Optional bi-polar
current indicator.
+/-7V5 = 150%
Semiconductor
fuse.
2 pole AC
supply
switch
3 Typical applications
3.1 ON OFF switch with Forward / Stop / Reverse switch
K340/680/1220 XRi
The +10V ref is inverted by connecting T1 to T6 to produce a -10V ref on T4. The changeover centre zero switch can
then select +10V for forward, -10V for reverse, or centre off for a ramp to zero.
Note. The AVF/tach select switch must be set, and the appropriate speed scale range selected for the max feedback
volts, depending on the source of speed feedback.
If a tachogenerator is used the polarity on T11 must be opposite to the speed reference on T2. Do not use an AC
rectified tachogenerator as they are unsuitable for bi-directional feedback.
K340XRi / K680XRi / K1220XRi Applications 9
Acw
10K
Pot
Cw
+10V
Min
IP
OP+/-
COM
IP+/-
PB+
PB-
RUN
COM
Tach
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
RLOP
RLIP
OVLD
TRIP
ROP
DEM
SOP
IOP
SPD
TRQ
L N F+
F -
A-
A+
Invert
Non-invert
OP IP
5
K
Up / Down Ramp
OP on T16. ROP
Speed P+I error
amplifier with
stability preset.
Output provides
current demand.
Arm Amps
Isolation
Amplifier.
IOP on T19
Max Current
Preset
Total speed
demand DEM
on T17 (-ve)
Speed Output
SOP on T18
Arm Volts
Isolation
Amplifier
X 2
30 Sec Stall timer
with logic outputs
TRIP on T15 and
Overload on T14
Current
Demand
Clamp.
0 - 5V on
T21 =
0 -100%
+12V
Centre zero comparator with window
threshold from +/-50mV to +/-10.5V
Goes high on T12 (0-10V. 10mA) if
+/- signal input T13 exceeds window.
+12V
.1
M
12
K
Current P+I error
amp with phase
angle controlled
anti-parallel
bridge.
AC 240V or 110V
Field coil
Armature.
For armatures
with a time
constant of
less than 5mS
a DC choke
must be wired
in series.
AC supply must be
semi-conductor fused.
Speed pot with 10V
reference from +/-
channel.
Normally closed
pushbuttons for
forward / reverse.
RUN switch. Close to
COMMON. Open for
coast to STOP.
Optional bi-polar
TACH for speed
feedback.
Optional bi-polar
speed and current
indicators
Semiconductor
fuse.
2 pole AC
supply
switch
3.2 Forward / Reverse using pushbuttons
K340/680/1220 XRi
The +10V ref is connected to the +/- channel by T1 to T6 to produce a +/-10V ref on T4. When the unit is powered up
it will be in the invert mode hence the reference to the speed pot will be -10V.
The normally closed pushbutton to T7 PB+ can then latch the channel into the non-invert mode when opened to give a
+10V reference to the speed pot. The normally closed pushbutton to T8 PB- can then latch the channel into the invert
mode when opened to give a -10V reference to the speed pot for reverse. If the pushbuttons are opened together then
the invert mode is selected.
The Min speed function will operate in both directions.
This configuration can be used for end of travel reversal if the pushbuttons are replaced by contacts on a machine
track.
K340XRi / K680XRi / K1220XRi Applications 10
Acw
10K
Pot
Cw
+10V
Min
IP
OP+/-
COM
IP+/-
PB+
PB-
RUN
COM
Tach
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
RLOP
RLIP
OVLD
TRIP
ROP
DEM
SOP
IOP
SPD
TRQ
L N F+
F -
A-
A+
Invert
Non-invert
OP IP
5
K
Up / Down Ramp
OP on T16. ROP
Speed P+I error
amplifier with
stability preset.
Output provides
current demand.
Arm Amps
Isolation
Amplifier.
IOP on T19
Max Current
Preset
Total speed
demand DEM
on T17 (-ve)
Speed Output
SOP on T18
Arm Volts
Isolation
Amplifier
X 2
30 Sec Stall timer
with logic outputs
TRIP on T15 and
Overload on T14
Current
Demand
Clamp.
0 - 5V on
T21 =
0 -100%
+12V
Centre zero comparator with window
threshold from +/-50mV to +/-10.5V
Goes high on T12 (0-10V. 10mA) if
+/- signal input T13 exceeds window.
+12V
.1
M
12
K
Current P+I error
amp with phase
angle controlled
anti-parallel
bridge.
AC 240V or 110V
Field coil
Armature.
For armatures
with a time
constant of
less than 5mS
a DC choke
must be wired
in series.
AC supply must be
semi-conductor fused.
Speed pot with 10V
reference.
RUN switch. Close to
COMMON. Open for
coast to STOP.
Fast stop switch.
Close to initiate fast
stop.
Relay
S
Signal relay
normally
open
3.3 Method for fast stopping and zero speed quench
K340/680/1220 XRi
The fast stop is actuated by the process of feeding an inverted speed reference into the direct speed input on T20. The
speed reference is taken from the ramp output on T16 and inverted using the +/- channel. The inverted output from
the channel is fed into T20 via the fast stop switch.
The inverted speed reference opposes the ramped speed reference immediately and hence the motor will stop under
current limit. Due to tolerances the final speed will be within a few percent of zero.
If the fast stop switch is opened the speed will immediately return under current limit to the ramped reference level.
Hence it is advisable to open T9 RUN when the motor has reached zero speed.
This is achieved by using the relay driver channel with the speed output from T18 SOP and the level preset adjusted to
say 3%. The T12 RLOP relay driver output drives a normally open signal relay wired in series with the RUN switch. To
start the drive the Pushbutton is activated until the speed rises above 3% and the relay energises. The pushbutton may
then be released. When the drive is brought to a standstill by whatever reason the relay de-energises and opens the
RUN line.
K340XRi / K680XRi / K1220XRi Applications 11
Start pushbutton.
Acw
10K
Pot
Cw
+10V
Min
IP
OP+/-
COM
IP+/-
PB+
PB-
RUN
COM
Tach
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
RLOP
RLIP
OVLD
TRIP
ROP
DEM
SOP
IOP
SPD
TRQ
L N F+
F -
A-
A+
Invert
Non-invert
OP IP
5
K
Up / Down Ramp
OP on T16. ROP
Speed P+I error
amplifier with
stability preset.
Output provides
current demand.
Arm Amps
Isolation
Amplifier.
IOP on T19
Max Current
Preset
Total speed
demand DEM
on T17 (-ve)
Speed Output
SOP on T18
Arm Volts
Isolation
Amplifier
X 2
30 Sec Stall timer
with logic outputs
TRIP on T15 and
Overload on T14
Current
Demand
Clamp.
0 - 5V on
T21 =
0 -100%
+12V
Centre zero comparator with window
threshold from +/-50mV to +/-10.5V
Goes high on T12 (0-10V. 10mA) if
+/- signal input T13 exceeds window.
+12V
.1
M
12
K
Current P+I error
amp with phase
angle controlled
anti-parallel
bridge.
AC 240V or 110V
Field coil
Armature.
For armatures
with a time
constant of
less than 5mS
a DC choke
must be wired
in series.
AC supply must be
semi-conductor fused.
Speed pot
with 10V
reference.
Relay
S
Relay
Stop pushbutton.
2 pole N.O. relay. (The coil and contacts should be
snubbered using a 0.1uF cap in series with 100R.)
1 pole N.C. relay
3.4 Zero reference interlock and Stop / Start pushbuttons.
K340/680/1220 XRi
With the unit powered up and the reference above the threshold set by the relay driver level preset, the signal relay
will be energised, and the contact will be closed. Hence the Start pushbutton is inoperative. When the operator brings
the external reference to zero, the the signal relay will de-energise and the Start pushbutton will be operative.
Then, when the Start pushbutton is closed, and providing the Stop pushbutton is also closed, the 2 pole relay will
energise. This will latch in the Start condition and close the RUN line. The drive can now be operated at any speed
until the Stop pushbutton is pressed. In order to start the operator must once more ensure the external reference is
zero.
This will work equally well with bi-directional systems.
K340XRi / K680XRi / K1220XRi Applications 12
+10V
Min
IP
OP+/-
COM
IP+/-
PB+
PB-
RUN
COM
Tach
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
RLOP
RLIP
OVLD
TRIP
ROP
DEM
SOP
IOP
SPD
TRQ
L N F+
F -
A-
A+
Invert
Non-invert
OP IP
5
K
Up / Down Ramp
OP on T16. ROP
Speed P+I error
amplifier with
stability preset.
Output provides
current demand.
Arm Amps
Isolation
Amplifier.
IOP on T19
Max Current
Preset
Total speed
demand DEM
on T17 (-ve)
Speed Output
SOP on T18
Arm Volts
Isolation
Amplifier
X 2
30 Sec Stall timer
with logic outputs
TRIP on T15 and
Overload on T14
Current
Demand
Clamp.
0 - 5V on
T21 =
0 -100%
+12V
Centre zero comparator with window
threshold from +/-50mV to +/-10.5V
Goes high on T12 (0-10V. 10mA) if
+/- signal input T13 exceeds window.
+12V
.1
M
12
K
Current P+I error
amp with phase
angle controlled
anti-parallel
bridge.
AC 240V or 110V
Field coil
Armature.
For armatures
with a time
constant of
less than 5mS
a DC choke
must be wired
in series.
AC supply must be
semi-conductor fused.
This resistor
creates 1.26V
reference on T2
4-20mA burden
resistor.
This node is
at -1.26V
10K Ohms
Resistor
316 Ohm
Resistor
Isolated 4-20mA
Current
loop source
4-20mA speed
reference.
3.5 Using an external 4-20mA speed signal
K340/680/1220 XRi
The 4-20mA floating source is imposed across a burden resistor of value 316 Ohms. (Standard E96 value).
This creates a voltage of 1.26 Volts at 4mA across the resistor. This represents the system zero.
The 10K Ohm resistor is used in conjunction with the Min speed preset to provide a reference of 1.26 volts which is
then inverted in the +/- channel.
The burden resistor is referred to the -1.26V source from T4 and hence the voltage created at 4mA on the speed input
T3 is zero volts as required.
With 20mA flowing (which represents 100% speed) the voltage across the burden is 6.32 Volts. This provides a speed
signal of 6.32 - 1.26 = 5.06 Volts on T3.
The T16 Ramp output is linked to T20 speed input to double the speed input strength and hence the 5V speed
reference will provide the standard speed scaling range.
For 0 - 20mA sources use a 249 Ohm burden resistor and refer it to common instead of -1.26 Volts.
K340XRi / K680XRi / K1220XRi Applications 13
Speed pot with
10V reference
Acw
10K
Pot
Cw
+10V
Min
IP
OP+/-
COM
IP+/-
PB+
PB-
RUN
COM
Tach
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
RLOP
RLIP
OVLD
TRIP
ROP
DEM
SOP
IOP
SPD
TRQ
L N F+
F -
A-
A+
Invert
Non-invert
OP IP
5
K
Up / Down Ramp
OP on T16. ROP
Speed P+I error
amplifier with
stability preset.
Output provides
current demand.
Arm Amps
Isolation
Amplifier.
IOP on T19
Max Current
Preset
Total speed
demand DEM
on T17 (-ve)
Speed Output
SOP on T18
Arm Volts
Isolation
Amplifier
X 2
30 Sec Stall timer
with logic outputs
TRIP on T15 and
Overload on T14
Current
Demand
Clamp.
0 - 5V on
T21 =
0 -100%
+12V
Centre zero comparator with window
threshold from +/-50mV to +/-10.5V
Goes high on T12 (0-10V. 10mA) if
+/- signal input T13 exceeds window.
+12V
.1
M
12
K
Current P+I error
amp with phase
angle controlled
anti-parallel
bridge.
AC 240V or 110V
Field coil
Armature.
For armatures
with a time
constant of
less than 5mS
a DC choke
must be wired
in series.
AC supply must be
semi-conductor fused.
Torque pot with
5V reference
This resistor is used to
reduce the torque ref
range to 5V max.
RUN switch. Close to
COMMON. Open for
coast to STOP.
Acw
10K
Pot
Cw
10K Ohms
Resistor
3.6 Torque control
K340/680/1220 XRi
T21 is 0 to +5V input for 0 to +/-100% current demand. This torque signal acts as a clamp on the current demand
produced by the speed loop.
Hence the speed loop current demand polarity determines the sign of the current, and the torque input clamps the
amplitude.
Also if the speed loop current demand falls below the input clamp level then the speed loop will regain control at a
speed lower than the clamp level allows. For the clamp to operate, the speed loop current demand must be arranged
to exceed the clamp level by ensuring the speed demand is high enough.
K340XRi / K680XRi / K1220XRi Applications 14
+10V
Min
IP
OP+/-
COM
IP+/-
PB+
PB-
RUN
COM
Tach
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
RLOP
RLIP
OVLD
TRIP
ROP
DEM
SOP
IOP
SPD
TRQ
L N F+
F -
A-
A+
Invert
Non-invert
OP IP
5
K
Up / Down Ramp
OP on T16. ROP
Speed P+I error
amplifier with
stability preset.
Output provides
current demand.
Arm Amps
Isolation
Amplifier.
IOP on T19
Max Current
Preset
Total speed
demand DEM
on T17 (-ve)
Speed Output
SOP on T18
Arm Volts
Isolation
Amplifier
X 2
30 Sec Stall timer
with logic outputs
TRIP on T15 and
Overload on T14
Current
Demand
Clamp.
0 - 5V on
T21 =
0 -100%
+12V
Centre zero comparator with window
threshold from +/-50mV to +/-10.5V
Goes high on T12 (0-10V. 10mA) if
+/- signal input T13 exceeds window.
+12V
.1
M
12
K
Current P+I error
amp with phase
angle controlled
anti-parallel
bridge.
AC 240V or 110V
Field coil
Armature.
For armatures
with a time
constant of
less than 5mS
a DC choke
must be wired
in series.
AC supply must be
semi-conductor fused.
This 1V level is used to ensure the
speed demand is always 10% more
than the master speed.
This resistor is used
with Min Speed preset
to provide 1V.
This signal is from
T19 IOP of the
master drive.
10K Ohms
Resistor
The common of the
master and slave must
be connected.
This signal is from
T16 Ramp output
from the master.
3.7 Load sharing slave single direction.
K340/680/1220 XRi
Load sharing is used when a large load is driven by more than 1 motor and each motor must bear the load in the same
proportion. The motors are linked mechanically via the load and usually rotate at the same speed.
T21 requires a 0 to +5V input for 0 to 100% current demand. This torque acts as a clamp on the current demand
produced by the speed loop. The signal is derived from the master drive T19 current output. Hence whatever current is
required by the master will also be provided by the slave.
To ensure that the current demand of the slave is always clamped by the torque input a 1V (10%) speed signal is added
to the direct speed input. This is derived from an external 10K resistor and the Min speed preset.
The main speed reference is sourced from the master T16 ramp output.
K340XRi / K680XRi / K1220XRi Applications 15
Acw
10K
Pot
Cw
+10V
Min
IP
OP+/-
COM
IP+/-
PB+
PB-
RUN
COM
Tach
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
RLOP
RLIP
OVLD
TRIP
ROP
DEM
SOP
IOP
SPD
TRQ
L N F+
F -
A-
A+
Invert
Non-invert
OP IP
5
K
Up / Down Ramp
OP on T16. ROP
Speed P+I error
amplifier with
stability preset.
Output provides
current demand.
Arm Amps
Isolation
Amplifier.
IOP on T19
Max Current
Preset
Total speed
demand DEM
on T17 (-ve)
Speed Output
SOP on T18
Arm Volts
Isolation
Amplifier
X 2
30 Sec Stall timer
with logic outputs
TRIP on T15 and
Overload on T14
Current
Demand
Clamp.
0 - 5V on
T21 =
0 -100%
+12V
Centre zero comparator with window
threshold from +/-50mV to +/-10.5V
Goes high on T12 (0-10V. 10mA) if
+/- signal input T13 exceeds window.
+12V
.1
M
12
K
Current P+I error
amp with phase
angle controlled
anti-parallel
bridge.
AC 240V or 110V
Field coil
Armature.
For armatures
with a time
constant of
less than 5mS
a DC choke
must be wired
in series.
AC supply must be
semi-conductor fused.
Connect T17 DEM
to T20 SPD
3.8 Low voltage speed feedback
K340/680/1220 XRi
The output on T17 is the inverted total speed demand. By connecting this into T20 the feedback scaling is reduced to
50% for both armature voltage and tacho feedback.
Hence:
With Spd x 2 switch OFF (right) maximum speed range = 20 to 50V.
With Spd x 2 switch ON (left) the maximum speed range = 40 to 100V.
The speed output T18 will now provide 0 to +/-5V for 0 to +/-100% speed.
CAUTION should be exercised if using this technique with armature voltage feedback as a way of operating a low
voltage motor from a relatively high voltage drive (e.g. 48V motor, 240V drive): The poor form-factor experienced by
the motor in such cases may lead to reduced brush life and increased operating temperature. It is also possible, in the
case of a permanent magnet motor, that demagnetisation will occur.
In such applications, it is preferable to match the AC supply to the DC armature voltage more closely. This may be
achieved by the use of a low voltage drive, powered from a step-down transformer (e.g. 48V motor, LV60 drive, 240V
to 60V auto-transformer). Please contact Bardac Drives if more information is required.
340XRi / 680XRi / 1220XRi Applications 16
- Data – Product manuals – Technical help – Drive glossary – FAQ – Brochures – Images - Data – Product manuals – Technical help –
Bardac Drives
40 Log Canoe Circle
Stevensville MD 21666
USA
Tel 410-604-3400
Fax 410-604-3500
Email: info@bardac.com
Web site: www.bardac.com
HG502082 iss 3, 10/11/10.
www.bardac.com
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