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Typical problems that this measurement shows up are:
i) 3000ft of wire was used on the job yet the bus measures
83 ohms. This shows an extra terminator some place on the
bus or that the first terminator was not removed for the test.
ii) The Bus measures high. By high is meant more than
expected up to infinite. This means there is a problem
between where you are an the end of the bus. Try again
half way down the bus to narrow down the problem location.
iii) The Bus measures more than 4000ft and now you come
to think of it you did use up a lot of rolls of wire. The bus
must be split. Call Tech support for help.
d) Check for Earth ground connections. With the whole bus
de-powered measure the ohms from +12v, Ground and A &
B of the bus to an earth ground. It must be infinite. If not,
find the problem.
4) Now that the bus is verified it is time to fire up the sys-
tem.
a) If it is a multi panel system start with panels that do not
have a clock in them.
i) Unplug the panel from the bus.
ii) Turn on the power.
iii) Check that the relays turn ON and OFF using the
on board push buttons. Press the center buttons. If they do
not work verify that the panel is in the "discrete" mode and
use the individual relay buttons.
NOTE: Sometimes the push buttons do not work first time.
Use your fingernail to get a high contact pressure onto the
control card under the button.
iv) Check that the voltage being sent to the bus is
3303000000 1110000000
0000000000 0000000000
0000000000 0000000000
0000000000 0000000000
0000000000 0000000000
0000000000 0000000000
0000000
Err:0
about 12 volts + or - 1.5 volts. Do not plug in the bus yet.
b) Fire up all the other panels that do not have clocks in the
same way as above.
c) Finally fire up the one with the clock and verify as above.
i) Note that the clock says the correct time. If time is
incorrect go to :SET UP MENU, SYSTEM SET UP, SET
TIME AND DATE and correct it. Remember to highlight the
HIT ENTER on the bottom of the screen to set the time.
d) Now plug in the bus to each of the panels and switches.
5) Verify that the clock can see everything on the bus.
a) Navigate through the clock to the
SETUP MENU,
SYSTEM SET UP,
RESTRICTED, (CODE 90001),
ADDRESSING BUS SCAN,
BUS SCAN DISPLAY.
Note that 3 stands for an 8 relay or 8 Zone board. A 16
zone board would show up as shown above with two threes
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