Flowserve BUSwitch with Foundation Fieldbus Communications Protocol - Manual (Page 6)

AX
ENIM0048-01 (Firmware Rev. Nov. 12 99) (AUTO-48) 11/01
Page 6 of 16
©2001, Flowserve Corporation, Springville, UT
Flowserve Corporation 1350 South Mountain Springs Parkway Phone: 801
489 2233
Flow Control Division Springville, Utah 84663 Facsimile: 801 489 2228
Automation Business Unit www.flowserve.com Email: [email protected]
Automax Valve Automation Systems
Product Specification
Figure 5
Special Notes on the fieldbus cabling.
Minimum voltage requirement for the BUSwitch™ is 9.5
VDC supply. The output voltage of the fieldbus power
supply, the current drawn and the electrical characteristics
of the data cable determine the maximum distance that a
particular segment can span. With data cable that
conforms to the FF cable type ‘A’ specification, distances
of 1900 meters are guaranteed. If a shielded cable is
used, connect the shield to ground at one point only.
Multiple grounds can lead to ground loops which can
impair the proper operation of the segment. For this
reason, a shield connection has not been provided inside
the BUSwitch™ housing. Radio frequency grounding at
multiple points through the use of capacitors, allowed by
the FF protocols, can be used for increased high
frequency EMI (electromagnetic interference) shielding.
For a more thorough treatment of data cable wiring and
aspects of installation refer to the F
OUNDATION Fieldbus
application guide AG-140: Wiring and Installation 31.25
Kbit/s, Voltage Mode, Wire Medium. Its reference
section lists additional documentation that can be
consulted for further information.
Adjustment of Switch Cams
1. Loosen five captive cover screws and remove
lid, turning slightly while lifting.
2. Place the actuator in the clockwise (CW)
position and connect to the fieldbus
segment.
3. Push down on the top cam until it clears
the splined coupler, rotating clockwise
until the CW LED is illuminated (figure
5).
4. Release the cam and insure that it fully
engages the spline.
5. Place the actuator in the counter-
clockwise (CCW) position.
6. Pull up on the lower cam until it clears
its splined coupler, rotating
counterclockwise until the CCW LED is
illuminated (figure 5).
BUSwitch™ Embedded Software
Specifications
Flowserve’s BUSwitch™ utilizes the SMAR
communications stack. Factory-configured embedded
soft-ware includes the resource block, transducer block,
(2) DO blocks and (4) DI blocks. The next sections
provide information about each of these blocks.
Flowserve assumes the reader has a fundamental
understanding of the nature, nomenclature, and geometry
of these blocks.
DISCLOSURE
The Flowserve BUSwitch™ has been certified by the
Fieldbus Foundation to be interoperable in accordance
with FOUNDATION Fieldbus (FF) standards. In addition,
the BUSwitch™ device has been proven interoperable
with Fisher’s DeltaV Control System. The term
interoperable DOES NOT mean the BUSwitch™ device
will behave exactly like other FF-interoperable devices.
Because of some flexibility in the interpretation of FF
standards, some minor differences exist between many
manufacturers. These differences DO NOT affect the
function of this device.
Flowserve has disclosed, in an addendum to this
document, known issues with individual control systems
we have tested. Users and systems integrators should
make allowances for these issues. Flowserve will not be
responsible for modifying software to change the behavior
of the BUSwitch™ relative to these issues.