Bimba PFC-LRT User Manual

Product Instructions

Position Feedback Cylinder LRT
Controller Manual

Please read this manual carefully

The information presented is in Bimba’s best engineering opinion and should be used for reference only. Recommendations derived should be verified under
actual operating conditions. Bimba reserves the right to change specifications without prior notice.

Bimba Manufacturing Company
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Email: [e-mail]
www.bimba.com
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Table of Contents

I. General Information...................................................................................................................

II. Relay Operation........................................................................................................................

A. Standard Installation.........................................................................................................

B. Operating Mode Configurations........................................................................................

1. Independent Relay Mode...........................................................................................

a. Non-Inverted Operation......………………………………..................................

b. Inverted Operation.........................……………………………….......................

c. Continuous Cycle Mode……..…………………………….……….......................

2. Setting the Switch Points of Output.....…………………………………........................

C. Setting the Switch Points of Output.................................................................................

III. Scalable Output.....................................…………………………………………........................

A. Output Boundaries and Actions....................……………………………...........................

B. Scaling the Output.......…………………..........................................................................

C. Setting Scalable Output......…………………………………………………........................

1. Setting the Offset......………………………………………………….............................

2. Setting the Gain…………………………………………………………..........................

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Page 9

Page 13

Page 13

Page 13

IV. Troubleshooting..........................................................……………………................................

V. System Specifications..............................................................................................................

VI. Applications....................................……………………………………………...........................

A. Single-solenoid Two-Position Valve..................................................................................

B. Manual Control Using a Three-position Valve......………………………….........................

C. Continuous Cycling Between Two Adjustment Limits.....………………............................

D. Two-Speed System Using Two Bimba Controllers...........................................................

The information presented is in Bimba’s best engineering opinion and should be used for reference only. Recommendations derived should be verified under
actual operating conditions. Bimba reserves the right to change specifications without prior notice.

Page 13

Page 14

Page 16

Page 16

Page 18

Page 20

Page 22

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I. GENERAL INFORMATION

The control unit uses position feedback information provided by the position sensor installed within a
PFC cylinder to direct its output action(s). The position sensor is basically a linear potentiometer. When a
DC potential is applied, a voltage relative to piston position is created. This voltage provides the neces­sary information for system operation.

There are six different controllers available (see FIGURE 1). Each controller offers two similar relay out­puts whose on/off points are adjustable to meet different application needs. Also, each of the controllers
provides a specific scalable analog output. Each of the controller's actions are discussed in greater detail
later in this manual.

Model Number Input Power Scalable Output

120AC4-20mA 120 VAC (60 HZ) 4-20 mA

120AC0-10DC 120 VAC (60 HZ) 0-10 VDC
12/24DC4-20mA 12-24 VDC 4-20 mA
12/24DC0-10DC 12-24 VDC 0-10 VDC

230AC4-20mA

230AC0-10DC

220-240 VAC

(50-60 HZ)

220-240 VAC

(50-60 HZ)

4-20 mA

0-10 VDC

FIGURE 1

Bimba Controllers

II. RELAY OPERATION

Each control unit is equipped with two adjustable outputs that function as adjustable limit switches. If
more than two outputs are needed, as many as three units may be slaved off of one master unit.

The information presented is in Bimba’s best engineering opinion and should be used for reference only. Recommendations derived should be verified under
actual operating conditions. Bimba reserves the right to change specifications without prior notice.

Bimba Manufacturing Company
Monee, IL 60449-0068
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Email: [e-mail]
www.bimba.com
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A. Standard Installation

Standard electrical hookup for each dual output unit is illustrated in FIGURE 2.

Wire Colors

Wires 6" Leads 3 Pin Connector

PFC Input Red Blue

PFC Output White Brown

PFC Ground Black Black

FIGURE 2

PIN LAYOUT

The information presented is in Bimba’s best engineering opinion and should be used for reference only. Recommendations derived should be verified under
actual operating conditions. Bimba reserves the right to change specifications without prior notice.

Bimba Manufacturing Company
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Standard electrical hookup produces standard output operation. FIGURE 3 illustrates ideal voltage
output versus cylinder travel and the corresponding output actions. Notice that the analog output is
minimum when the cylinder is fully retracted and increases as the cylinder is extended. This is standard
output action. For an in-depth discussion of the effects that Jumper J1 (Latching Jumper) has on the
output operation, refer to Section II B of this manual.

FIGURE 3

OUTPUT CONFIGURATIONS

NOTE: Outputs 1 and 2 are adjustable along the full range of cylinder movement and Set Point 1
can be adjusted beyond Set Point 2. If the Continuous Cycle Mode is used, Set Point 2 must be
adjusted beyond Set Point 1 as in FIGURE 3.

The information presented is in Bimba’s best engineering opinion and should be used for reference only. Recommendations derived should be verified under
actual operating conditions. Bimba reserves the right to change specifications without prior notice.

Bimba Manufacturing Company
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Email: [e-mail]
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B. Operating Mode Configurations

1. Independent Relay Mode

The standard operation of a dual output unit is the Independent Relay Mode.

a. Non-Inverted Operation

To implement - install load to Normally Open (NO) side of the relays. Terminal 10 for Relay
1 and Terminal 13 for Relay 2. Terminal configuration is shown in FIGURE 2. When the load
is connected to the (NO) sides of the relays, the output will turn on when the analog output
is greater than its set point and turn off as the analog output drops below the set point
(See FIGURE 3).

b. Inverted Operation

To implement - install load to Normally Closed (NC) side of the relays. Terminal 9 for Relay
1 and Terminal 12 for Relay 2.

When the load is connected to the NC sides of the relays, the output will turn off when the
analog output is greater than its set point and turn on as the analog output drops below
the set point. (See FIGURE 3)

c. Limit Switch Operation

To implement - load must be installed to one Normally Closed (NC) Relay lead and one
Normally Open (NO) Relay lead. Use Terminal 9 for Relay 1; Set Point 1 and Terminal 13
for Relay 2; Set Point 2. (Terminal configuration is shown in FIGURE 2.). This arrangement
turns on Relay 1 when the analog output is less than Set Point 1 and turns on Relay
2 when the Analog Output is greater than Set Point 2. This is traditionally the information
provided by a set of limit switches.

As indicated in FIGURE 4, the Independent Relay Mode of operation is factory enabled with Jumper 1 in
Position A.

To change the operation of the controller, the following procedures should be followed. Jumper 1 is
located on the bottom side of the circuit board. The jumper can be accessed by removing all four corner
screws of the controller. At this point, the cover and circuit board should come out of the base. Turn the
cover and circuit board over so that the bottom of the circuit board is visible. It should look like Figure 5.
The jumper can be moved into Position A or B by pulling up on the black jumper and placing it over the
appropriate pins.

When the jumper is located in the desired position, place the circuit board and cover back into the base
and tighten all four corner screws.

The information presented is in Bimba’s best engineering opinion and should be used for reference only. Recommendations derived should be verified under
actual operating conditions. Bimba reserves the right to change specifications without prior notice.

Bimba Manufacturing Company
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JP1

Relay

Output

1 2 3 1 2 3

Position A

INDEPENDENT RELAY MODE

CONTINUOUSLY CYCLE MODE

Position B

FIGURE 4

OPERATING MODE SELECTION

2. Continuous Cycle Mode

To activate the Continuous Cycle Mode, move Jumper 1 to Position B (See FIGURE 4). This enables the
Continuous Cycle Mode and disables the Independent Relay Mode.

As one output turns on, the other turns off and vice-versa (See FIGURE 3). This mode of operation al­lows for continuous cycling of a cylinder between two adjustable limits. Set Point 1 control potentiometer
is used to set the inner limit and Set Point 2 control potentiometer is used to set the outer limit. Set Point
1 must be less than Set Point 2.

In this mode of operation, the load is connected to the Normally Open (NO) side of the relays; pins 10
and 13 in FIGURE 2. This means an output is turned on as the analog output is greater than its set point
and turned off as the analog output drops below its set point.

FIGURE 5

CIRCUIT LAYOUT

The information presented is in Bimba’s best engineering opinion and should be used for reference only. Recommendations derived should be verified under
actual operating conditions. Bimba reserves the right to change specifications without prior notice.

Bimba Manufacturing Company
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Email: [e-mail]
www.bimba.com
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C. Setting the Switch Points of Output

At this point make sure all electrical connections have been made properly and apply power to the con­troller. Each controller has the same controls and used the same set-up procedure. To set the output 1
switch point:

1. Turn Set Point potentiometer 1 (Set 1) fully counterclockwise.

2. Move the piston to the position where output 1 should switch on and off.

3. Observe Set Point 1 LED.

4. Rotate Set Point potentiometer 1 (Set 1) clockwise until Set Point 1 LED just changes state (on to
off or vice-versa).

Follow the same procedure (using Set Point 2 controls) to set the switch point of output 2.

1. Turn Set Point potentiometer 2 (Set 2) fully clockwise.

2. Move the piston to the position where output 2 should switch on and off.

3. Observe Set Point 2 LED.

4. Rotate Set Point potentiometer 2 (Set 2) counterclockwise until Set Point 2 LED just changes
state (on to off or vice-versa)

III. SCALABLE OUTPUT

There are two different output types: 0V to +10V and 4mA to 20mA. Each type is available with AC or
DC power input. Each output is scalable. For detailed information on scaling, refer to Section III B.

A. Output Boundaries and Actions

Standard output operation produces minimum analog output at minimum cylinder extension and maxi­mum analog output at maximum extension. FIGURE 6 plots ideal analog output versus cylinder exten­sion.

FIGURE 6

STANDARD ANALOG OUTPUT

The information presented is in Bimba’s best engineering opinion and should be used for reference only. Recommendations derived should be verified under
actual operating conditions. Bimba reserves the right to change specifications without prior notice.

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For some applications it may be desirable to reverse this operation and have maximum analog output at
minimum extension and minimum output at maximum extension. This can be achieved by switching the
wires at Terminals 3 and 5 of the control unit as shown before in FIGURE 2.

The resulting output action is opposite from standard (FIGURE 6). FIGURE 7 illustrates this reversed out­put action.

FIGURE 7

REVERSED ANALOG OUTPUT

B. Scaling the Output

Scaling is a feature that allows a unit's output boundaries to be adjusted to individual application needs.
The minimum analog output point (offset) is adjustable, as well as the distance from minimum output that
the cylinder must travel until maximum analog output is achieved (this will be referred to as “gain” from
here on). The output boundaries provide minimum and maximum output with linear output between the
two limits.

FIGURE 8 illustrates the allowable output adjustment range for standard output operation as a percent­age of full cylinder extension. FIGURE 9 illustrates the allowable output range for reversed output opera­tion. The shaded region of each graph represents the allowable area.

The figures illustrate two impor­tant facts.

1. The maximum offset that the
minimum output point can have
is 50% of cylinder stroke.

2. The smallest “gain” range can
be no less than 50% of cylinder
stroke.

FIGURE 8

STANDARD OUTPUT RANGE

FIGURE 9

REVERSED OUTPUT RANGE

The figures illustrate several ac­ceptable output schemes and
then several improper output
schemes for a 12" cylinder.

The information presented is in Bimba’s best engineering opinion and should be used for reference only. Recommendations derived should be verified under
actual operating conditions. Bimba reserves the right to change specifications without prior notice.

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ANALOG OUTPUT

VOLTS

OUTPUT

BOUNDARIES

50% CYLINDER TRAVEL (IN.)

Minimum

Output

“Offset”

Maximum

Output

Point

Output

“Gain”

1. 0" 12" 12"

2. 2" 10" 8"

3. 5" 11" 6"

Minimum

Gain

FIGURE 10

ACCEPTABLE OUTPUT

The information presented is in Bimba’s best engineering opinion and should be used for reference only. Recommendations derived should be verified under
actual operating conditions. Bimba reserves the right to change specifications without prior notice.

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ANALOG OUTPUT

VOLTS

OUTPUT

BOUNDARIES

CYLINDER TRAVEL (IN.)

Minimum

Output

“Offset”

1. 2" 7" 5"

2. 4" 8" 4"

3. 4"

Maximum

Output

Point

Never

Reached

Output

“Gain”

Less than

allowable

FIGURE 11

UNACCEPTABLE ANALOG OUTPUT

The information presented is in Bimba’s best engineering opinion and should be used for reference only. Recommendations derived should be verified under
actual operating conditions. Bimba reserves the right to change specifications without prior notice.

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The setting of output boundaries is accomplished by adjusting the potentiometers offset and gain (refer
to FIGURE 2).

FIGURE 12

SET POINT ADJUSTMENT

Each adjustment affects the output in a different way. The offset adjustment is used to set the minimum
analog output point. When adjusted, it shifts the entire output response range. FIGURE 13 illustrates the
effect of adjusting the offset potentiometer. Notice how the offset changes but the “gain” remains the
same.

FIGURE 13

OFFSET ADJUSTMENT

When the “gain” potentiometer is rotated clockwise, the gain is decreased and when rotated counter­clockwise, the gain is increased. FIGURE 14 shows how potentiometer adjustment affects the gain, but
doesn't change the minimum output offset.

FIGURE 14

MAXIMUM OUTPUT (GAIN) ADJUSTMENT

The information presented is in Bimba’s best engineering opinion and should be used for reference only. Recommendations derived should be verified under
actual operating conditions. Bimba reserves the right to change specifications without prior notice.

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C. Setting Scalable Output

The procedure used to set the two boundaries is as follows:

1. Setting the Offset (minimum output point)

a. Move the piston to the minimum output wanted.

b. On 0-10 VDC Controllers: Place a voltmeter across Terminal 6 (Analog Out) and 7 (Analog
GND). On 4-20 mA Output Controllers: Place an ammeter in series with the load to be driven.
Current sources from Terminal 6 (Analog Out) and returns to Terminal 7 (Analog GND).

c. Adjust the offset potentiometer until the respective minimum output is reached.

2. Setting the Gain (distance between minimum and maximum analog output)

a. Move the piston to the maximum output point wanted.

b. On 0-10 VDC Output Controllers: Place a voltmeter across Terminal 6 (Analog Out) and 7
(Analog GND). On 4-20 mA Output Controllers: Place an ammeter in series with the load to
be driven. Current sources from Terminal 6 (Analog Out) and returns to Terminal 7
(Analog GND).

c. Adjust the gain potentiometer until the respective maximum output is reached.

This completes the scaling procedure. At this point the unit is set-up and ready for use.

IV. TROUBLESHOOTING

The controllers operate on very fundamental principles which greatly reduce the likelihood of problems. If
a problem arises, there are several items to check before consulting your distributor.

1. Verify that all connections have been made properly.

2. Verify that the required power source is working.

3. Verify that the wiper signal (0 to 10 VDC) at Terminal 4 is changing with cylinder movement.

If all of these check out, contact your distributor for further assistance.

The information presented is in Bimba’s best engineering opinion and should be used for reference only. Recommendations derived should be verified under
actual operating conditions. Bimba reserves the right to change specifications without prior notice.

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V. SYSTEM SPECIFICATIONS

AUXILIARY POWER REQUIREMENT:

AC MODELS.......................................................................................100 TO 135 VAC (115 VAC INPUT)

200 TO 270 VAC (230 VAC INPUT)

DC MODELS ...................................................................................11.8 TO 26 VDC (12/24 VDC INPUT)

POWER REQUIREMENT:

AC MODELS............................................................................ 5 VA MAXIMUM (120 TO 230 VAC)

DC MODELS ...................................................................................... 1.2 VA MAXIMUM (12 VDC)

2.4 VA MAX (24 VDC)

FREQUENCY RANGE ................................................................................................................50/60 HZ

TRANSDUCER EXCITATION VOLTAGE ..................................................................... 10 VDC (NOMINAL)

ELECTRICAL CONNECTIONS ........................................13 POSITION EURO STYLE TERMINAL BLOCK

DIELECTRIC STRENGTH:

AC MODELS.........................................................................2000 VAC (ALL INPUTS TO ALL OUTPUTS)

2000 VAC (TERMINALS TO CASE)

DC MODELS ....................................................................2000 VAC (ALL INPUTS TO RELAY OUTPUTS)

2000 VAC (TERMINALS TO CASE)

NOTE: THE NEGATIVE POWER SUPPLY CONNECTION IS COMMON TO THE ANALOG SIGNAL OUTPUT.

TRANSIENT PROTECTION ......... ALL INPUTS AND OUTPUTS ARE DESIGNED TO WITHSTAND

TRANSIENT ENERGY LEVELS NORMALLY ASSOCIATED WITH CATEGORY III SERVICE LOCATIONS
AS DEFINED BY IEC 644. INDUSTRIAL INSTALLATIONS THAT ARE TYPICAL OF THIS ENVIRONMENT
WOULD INCLUDE MOST DISTRIBUTION, FEEDER OR BRANCH CIRCUIT CONNECTIONS THAT ARE
NOT LOCATED AT THE IMMEDIATE SERVICE ENTRANCE.

SHIPPING WEIGHT ...................................................................................................... APPROX. 12 OZ.

OPERATING TEMPERATURE RANGE ........................................... (-30° C TO +70° C) -22° F TO 160° F

(0° C TO +70° C) 32° F TO 160° F FOR 12 VDC OPERATION

STORAGE TEMPERATURE RANGE ............................................... (-40° C TO +85° C) -40° F TO 185° F

ENCLOSURE DIMENSIONS ....................................................................... 1.31" H X 5.50" W X 3.25" D

The information presented is in Bimba’s best engineering opinion and should be used for reference only. Recommendations derived should be verified under
actual operating conditions. Bimba reserves the right to change specifications without prior notice.

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Position Feedback Control Module

Unless noted otherwise:

Ambient Temperature = (25° C) 77° F Nominal
Aux. Power (AC Models) = 120 VAC, 60 HZ
Aux. Power (DC Models) = 24 VDC

Relay Outputs

Control Limit Set Point Range...............................2 independent adjustments settable from 0 to 100% of

cylinder stroke

Temperature Influence on Control Limits........................................................................±0.01% stroke/°C

(-30° C to +70° C)

Output Contact Ratings........................................................5 A, 250 VAC, 0.8 power factor (general use)

5 A, 30 VDC (resistive)

360 VA, 240 V, 0.4 power factor (Pilot Duty)

Output Contact Configuration............................................................2 independent form C (SPDT) relays

Each relay has a corresponding control limit set point adjustment

Response Time (Excluding Bounce)
Operate Time = 8 mS TYP/12 mS maximum
Release Time = 4 mS TYP/6 mS maximum

Mechanical Life.......................................................................................20,000,000 operations minimum

Analog Outputs

Output Load Specifications.....................................................................0 to 10 VDC @ 10 mA maximum

4 to 20 mA @ 500 Ω maximum loop resistance

350 Ω for 12 VDC input

Zero Offset Adjustment Range.................................................................................± 5V (10 VDC Output)

± 8 mA (4 to 20 mA Output)

Gain Adjustment Range.........................................................................From 0.5 to 2.0 times input signal

Output Limits.................................................................................................13 V typical (10 VDC output)

25 mA typical (4 to 20 mA output)

Temperature Influence on Analog Output..................................................<±0.02% Full Scale Output / °C

(-30° C to +70° C)

Output Ripple..................................................................................................<0.2% of Full Scale Output

Response Time (0 to 90% of final value)

0-10 VDC = 2mS TYP/3 mS maximum
4-20 mA = 2mS TYP/3 mS maximum

The information presented is in Bimba’s best engineering opinion and should be used for reference only. Recommendations derived should be verified under
actual operating conditions. Bimba reserves the right to change specifications without prior notice.

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VI. APPLICATIONS

A. Single-Solenoid Two-Position Valve

DESIRED RESULTS: A cylinder/system that will cycle between two adjustable limits.

EQUIPMENT:
Single Solenoid (12 VDC) 2-position valve
Bimba Controller (Continuous Cycle Mode)
10" Stroke cylinder (any bore)

FIGURE 15

FIGURE 15 illustrates a typical pneumatic operating system. Movement of the 10" cylinder is controlled
by the single solenoid two-position valve. When the solenoid is energized, the cylinder will retract. When
the solenoid is not energized, the cylinder will extend.

The information presented is in Bimba’s best engineering opinion and should be used for reference only. Recommendations derived should be verified under
actual operating conditions. Bimba reserves the right to change specifications without prior notice.

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FIGURE 16

By using the Continuous Cycle Mode of the controller, a continuous cycling process can be obtained.
The N.O. contact of Relay 1 is the only output necessary for cycling. The control potentiometers are
used for setting the inner and outer limits of the stroke. At each limit the cylinder will reverse direction and
move toward the other limit. This process will continue indefinitely until interrupted.

FIGURE 16 illustrates Relay 1 operation and the ideal voltage output versus cylinder travel (seen at Ter­minals 6 and 7). Control potentiometer 1 is used to set the inner limit (2") and control potentiometer 2 is
used to set the outer limit (9"). The cylinder will extend while the N.C. contact of Relay 1 is closed. When
the cylinder reaches the outer limit, the N.O. contact of Relay 1 will close. When this happens, power is
applied to the solenoid causing the cylinder to retract. When the inner limit is reached, the relay returns
to normal and the process repeats itself.

The information presented is in Bimba’s best engineering opinion and should be used for reference only. Recommendations derived should be verified under
actual operating conditions. Bimba reserves the right to change specifications without prior notice.

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B. Manual Control Using a Three-Position Valve

DESIRED RESULTS: A cylinder/system that is manually operated between two adjustable limits.

EQUIPMENT:
Double Solenoid (24 VDC) 3-position valve
Bimba Controller (Independent Relay Mode)
16" cylinder (any bore)

FIGURE 17

FIGURE 17 illustrates the internal connections of typical pneumatic applications. Movement of the cyl­inder is controlled by the double solenoid three-position valve in conjunction with the manual push but­ton switches. For any movement to occur, an output must be energized and its respective push button
switch must also be pushed. In this application Relay 1 is used to retract the cylinder and Relay 2 is used
for extension.

NOTE: Relay operation is the same on extend and retract strokes.

The information presented is in Bimba’s best engineering opinion and should be used for reference only. Recommendations derived should be verified under
actual operating conditions. Bimba reserves the right to change specifications without prior notice.

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FIGURE 18

When the cylinder is fully retracted, Relay 2 is turned on. Pushing the manual extend push button will
cause the cylinder to extend until it reaches the set point (14"). At this time, Relay 2 will turn off and
motion will cease. Relay 1 will be on and depressing the retract switch will cause the cylinder to retract
until Relay 1 turns off at 4". When Relay 1 turns off, motion will cease and the process can be repeated
whenever desired.

FIGURE 18 illustrates the relay operations and the ideal voltage output versus piston travel (seen at
Terminals 6 and 7). Control potentiometer 1 is used to set the inner limit (4") and control potentiometer
2 is used to set the outer limit (14"). Relay 1 is energized any time the cylinder is extended more than 4".
Relay 2 is energized any time the cylinder is less than 14". These two points are the boundaries of cylin­der travel.

The information presented is in Bimba’s best engineering opinion and should be used for reference only. Recommendations derived should be verified under
actual operating conditions. Bimba reserves the right to change specifications without prior notice.

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C. Continuous Cycling Between Two Adjustment Limits

DESIRED RESULTS: A cylinder/stream that will cycle between two adjustable limits.

OPERATING SITUATION EQUIPMENT:
3-position valve
DC solenoids (2 amp max.)
Bimba Controller (using the Continuous Cycle Mode) and the inverted mode on relay
12" cylinder (any bore)

FIGURE 19

FIGURE 19 illustrates a typical pneumatic application. In this application, cylinder will continually cycle
between boundaries of 2" and 10" of overall cylinder stroke.

The information presented is in Bimba’s best engineering opinion and should be used for reference only. Recommendations derived should be verified under
actual operating conditions. Bimba reserves the right to change specifications without prior notice.

Bimba Manufacturing Company
Monee, IL 60449-0068
Telephone: [phone]
Email: [e-mail]
www.bimba.com
Rev Level: 0

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FIGURE 20

By using the Continuous Cycle Mode of the controller, the cylinder will continually cycle between the two
set point limits. In this case, there will be 8" of piston travel in each direction to perform the desired task.

FIGURE 20 illustrates the output actions and the ideal voltage output versus piston travel (seen at Ter­minals 6 and 7). Control potentiometer 1 is used to set the inner limit (2") and control potentiometer 2
is used to set the outer limit (10"). Relay 1 will be on while the cylinder is retracting to the inner limit (2").
When the piston reaches the inner limit, Relay 1 will shut off and Relay 2 will be energized. Relay 2 will
cause the cylinder to extend until the piston reaches the outer limit (10"), where Relay 1 will turn on and
the process will repeat.

The information presented is in Bimba’s best engineering opinion and should be used for reference only. Recommendations derived should be verified under
actual operating conditions. Bimba reserves the right to change specifications without prior notice.

Bimba Manufacturing Company
Monee, IL 60449-0068
Telephone: [phone]
Email: [e-mail]
www.bimba.com
Rev Level: 0

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D. Two-speed System Using Two Bimba Controllers

DESIRED RESULTS: A cylinder/system that operates at two different speeds. It is desired to have high­speed movement between 2 and 6 inches of the stroke. It is also desired to have the motion slow down
for low-speed operation between 1 and 2, and 6 and 7 inches.

OPERATING SITUATION EQUIPMENT:
2 three-position valves
DC solenoids (12 VDC 2 AMP max.)
2 Bimba Controllers
8" cylinder (any bore)

FIGURE 21

FIGURE 21 shows a two speed system using two three-position valves and two controllers. The external
extend and retract switches can be manual push buttons or some other configuration which is actuated
by the machine being controlled by the cylinder. In this example when the extend switch is closed, power
is supplied to Relays 2 and 4.

The information presented is in Bimba’s best engineering opinion and should be used for reference only. Recommendations derived should be verified under
actual operating conditions. Bimba reserves the right to change specifications without prior notice.

Bimba Manufacturing Company
Monee, IL 60449-0068
Telephone: [phone]
Email: [e-mail]
www.bimba.com
Rev Level: 0

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FIGURE 22

FIGURE 22 shows the condition of the output relays during cylinder movement. The cylinder extends
with both relays 2 and 4 on and solenoid 2 and 4 energized. At 6 inches solenoid 2 turns off, removing
the high speed source from the cylinder. The pressure coming from valve 2 is reduced, therefore, the cyl­inder moves slower between 6 inches and 7 inches. Solenoid 4 remains on until the cylinder reaches 7
inches where it stops. The operation is similar on the retract cycle (using the retract switch and solenoids
1 and 3). Controls 1, 2, 3, and 4 determine the switching positions of relays 1 through 4 respectively. The
panel LEDs correspond to relay operation.

The information presented is in Bimba’s best engineering opinion and should be used for reference only. Recommendations derived should be verified under
actual operating conditions. Bimba reserves the right to change specifications without prior notice.

Bimba Manufacturing Company
Monee, IL 60449-0068
Telephone: [phone]
Email: [e-mail]
www.bimba.com
Rev Level: 0

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