Pulsar TC-10B, User Manual

Page: 143 / 190

October 2003 Page 16–9
Chapter 16. Universal Checkback Module
16
Step 1. Unpack the module.
||Open the carton and remove the Universal
Checkback Module. Check the software versions
of all checkback modules working together to
make sure they are the same basic revision, espe-
cially if they were shipped from Pulsar at different
times. Revision 1.0x will not work with revision
2.0x, for example. For optimum operation all
modules should be the same revision. Check
Pulsar's website for PLC software downloads to
upgrade to the latest revision. You can check the
version by looking at the label on the programmed
chip (U4) on the Universal Checkback module. If
this is missing then you will need to connect a
computer to the 9-pin serial connector on the front
of the module and power it up. Refer to Fig. 16-4.
Before operating the Universal Checkback
modules, verify that manual keying (using the HL
& LL pushbuttons on front of the Keying module)
of both transmitters gives a correct response at the
corresponding far end receiver. LL (low level)
keying should give -10 dB on both the local and
far end Receiver module. HL (high level) keying
should give 0 dB on both the local and far end
receiver module. NOTE: The self-adjusting
receiver has two sensitivity settings that need to be
made. The first one is for setting with the far end
transmitter keyed to 10W (HL) and the second
sensitivity (local) setting is for the local trans-
mitter keyed to 10W (HL).
For a 3-terminal line you have to set each receiver
module to the weakest transmitter signal coming
in. Only for the weakest remote transmitter and for
your local transmitter will you see 0 dB for HL
keying and -10 dB for LL keying. Other transmit-
ters will have a higher signal level (shown on the
Receiver module).
For installations where you have not already tried
known settings it is recommended you first try
Pulsar's standard factory settings regardless of
your final desired settings. This allows you to
know that at least the system works with standard
factory settings, and then you can check for incon-
sistencies in your settings if your settings don't
work and the standard factory settings do.
For 2-terminal lines set the Universal Checkback
module that you want to be the master to Factory
Setting # 1 by setting the 4 position DIP switch
(S1) to have position 1 down (ON) and all other
three positions up (OFF). Note that the green LED
#1 will come on when it is set to factory setting #1.
Then set the other Universal Checkback module
that you want to be the remote to Factory Setting
# 2 by setting the 4 position DIP switch (S1) to
have position 2 down (ON) and all other three
positions up (OFF). Note that the green LED #2
will come on when it is set to factory setting
#2.These particular factory settings should give
you a green "CHECK OK" LED after performing
a checkback test. Then you can you change the
settings to whatever you desire and try again.
For 3-terminal lines you can do something similar
as for 2-terminal lines above. Set the master to
Factory Setting # 1 and the first & second remotes
to Factory Setting # 2. Then using a computer
change the master, first remote, and second remote
settings to say "Last Remote = 2" by typing "set
last 2", and in addition change the second remote
Table 16–2. Universal Checkback Module DIP Switch Settings.
S1 S2 S3 S4 Settings Option
off off off not used Custom Settings Enabled
on off off not used Factory Preset #1 Settings
off on off not used Factory Preset #2 Settings
on on off not used Factory Preset #3 Settings
off off on not used Factory Preset #4 Settings
on off on not used Factory Preset #5 Settings
off on on not used Factory Preset #6 Settings