Bimba PFC - Manual

Bimba Manufacturing Company
Monee, IL 60449
TEL 708/534-8544 • FAX: 708/235-2014
Visit our Web Site at: www.bimba.com
Technical Assistance: 1-800-44-BIMBA
Form PFC-INST-1108
Bimba’s ISO9001 system verifi es that all products produced and delivered meet Bimba’s rigid
quality standards and meet or exceed the expectations of customers.
This certifi cate verifi es that the Position Feedback Cylinder shipped in this box has been
tested and passes the following criteria:
Free of shorts between the cylinder body and rod and the leads. •
No dropouts or noise over length of LRT. •
For optimum performance and longer life:
1. Use Clean Dry Air, fi ltered to 5 microns with 0º F dew point.
2. Port Thread sealant can be a contaminant. Excess pipe seal compounds or improperly
applied Tefl on tape can lead to faulty feedback. Use fi ttings that include a dry sealant on
the threads.
3. Operate at lower speeds (install fl ow controls) to extend life; stay below 6 inches per
second.
4. Identify your minimum requirements for accuracy and repeatability and make sure they
are achievable before purchasing components.
5. If you are converting the analog feedback voltage into a digital signal, consider A/D
conversion accuracy and time, and use differential A/D conversion (not open ended).
6. Insure the device measuring the PFC’s Output Signal has a minimum of 1,000,000 Ohms
(1 Meg-Ohm) of input impedance.
7. Use a single point ground approach with a separate wire from each piece of equipment
to the single point ground location.
8. Physically separate electrically noisy components from sensitive devices and cables.
Noisy components include AC lines and magnetic fi elds.
9. Provide the PFC and controls with clean, dedicated power supplies (do not share with
electrically noisy valves, relays or solenoids).
10. Order DC powered valves with diode suppression.
11. Order AC powered valves with R-C Snubber suppression.
12. If a valve or relay does not include internal noise suppression add an Okaya model
number XEB0471 RC Snubber across the items power leads (locate it as close as
possible to the noise source). Okaya’s US offi ce is located in Valparaiso, Indiana, and
their phone number is 219-477-4488.
13. Always use the lowest noise (ripple) regulated power supply you can afford for your
sensitive items (a linear NOT a switching supply). If a vendor offers any kind of noise
suppression device as an accessory for their component), order it. Locate it as close to
the component as possible.
14. Consider fi ltering the power source to any sensitive instrument by placing a capacitor
across the power supply leads to the instrument.
15. Always use twisted, shielded cable (preferably instrumentation grade) for any sensitive
signal path. Use cable with a drain wire (the drain wire is connected to the foil shield); it
is much easier to connect the drain wire to a ground than it is to connect the foil shield to
ground.
16. Always minimize the length of unshielded wire that extends beyond the conductor (try to
expose less than 0.10 inch of unshielded wire).
17. Do not attach both ends of the cable’s shield to ground; attach one end only, preferably at
the data acquisition end. If this is not possible, it is far better to leave both ends “fl oating”
than it is to attach both ends to ground.
Inspector: _________________
Date: _________________
PCS controller instruction manual – download the most up to date copy at
http://www.bimba.com/Products/PositionControl/ .
PFC Instructions
Wires 6" Leads Plug
Input Red Blue
Ground Black Black
Output White Brown
BLACK (Ground)
M8 DIN
WHITE
(Output)
RED (Input)
CONNECTOR