14
•
If a radio is used, verify directional antenna with correct frequency
range is pointed toward base (
±
6
°
). The antenna should be mounted
vertically, with the vanes perpendicular to the ground. Verify that the
radio is good, with the same frequencies used.
•
If a modem is used, verify dial tone on line at the telephone
company’s termination box by checking Tip and Ring. Check wiring
from phone company’s box to dial-up modem. If cellular, also check
for proper Tip & Ring voltage available. Insure phone number is
correct in the
µ
FLO and WinCCU.
NOTE:
In the United States, telephone companies use a 48 volt power
supply so the typical on-hook voltage between the
Tip
and
Ring
wires should be something less than 48 volts. Measuring another
way,
Tip
to ground is approx. zero volts and
Ring
to ground is
approx. –48 volts.
In the off-hook condition, Tip to ground will be approx. –20 volts
while Ring to ground will be approx. –28 volts or approx. 8 volts
between Tip and Ring.
Users in other countries will have to consult their local telephone
companies for voltage specifications.
Wiring
Specific wiring drawings are sent with each
µ
FLO, based on the options
ordered. Most wiring diagrams, including communications are available
on the web at http://www.abb.com/totalflow. Select “Continuing Customer
Service and Support”, and then select “Wiring Instructions”.
Communications pin-outs of the
µ
FLO are shown on pages 10 and 11
of this guide.
