Flowserve BUSwitch - Manual (Page 5)

Electrical Connections
CAUTION
To prevent ignition of hazardous atmos-
pheres, keep cover bolts tight while circuits
are live. Disconnect supply circuit before
opening.
Entry into the BUSwitch ™ housing is made through
three 1 /
2
” NPT conduit entries. Figures 3 and 4
provide terminal locations on the interface card.
Connection of the data cable is made to connector
P3 – observing polarity. Incorrect polarity will not
damage the electronics, but it will prevent communi-
cation. For hazardous locations, Underwriters
Laboratories (UL) and the National Electric Code
(NEC) require an approved sealing fitting within
eighteen inches of the switch enclosure. Sealing
fittings are not required for Division 2 non-incendive
applications.
CAUTION
Make sure power is turned off when making
electrical connection. Inadvertent power
cycling will result in BUSwitch
™ shutdown.
After a power shut-down wait at least five
seconds before attempting to turn power
back on to assure BUSwitch
™ start-up.
Open conduit entries must be closed after installation
using a close-up plug approved for hazardous
locations. Conduit and plugs must fully engage
five threads.
Terminal P4 is provided for the input of a signal from
an external dry-contact switch. Jumper J1 and J2
change the configuration of this input. Factory setting
is Normally Closed with DI-2 OUT_D value Discrete
1 = contact open and Discrete 0 = contact closed.
Change the jumper setting to “normally open” for
Discrete 0 = contact open.
AXAIM020-01 (AUTO-48) 3/03 Page 5 of 16
© 2003, Flowserve Corporation, Printed in U.S.A.
BUSwitch ™ with F
OUNDATION
® Fieldbus Protocol
Installation, Operating and Maintenance Instructions
Flowserve Corporation 1350 N. Mountain Springs Parkway 1978 Foreman Dr.
Flow Control Division Springville, Utah 84663-3004 Cookeville, TN 38501
www.flowserve.com Phone: 801 489 8611 Phone: 931 432 4021
Figure 3
Interface Card: 2-Wire Version XA0238
Figure 4
Interface Card: 4-Wire Version XA0242