RE-TRANSMITTED ANALOG OUTPUT (Optional)
The re-transmitted analog output option transmits a digitally
programmable 4 to 20 mA or 0 to 10 VDC signal to drive chart recorders,
remote indicators and controllers. The option is contained on the upper PCB
and has two outputs, “ANALOG-” (TBB #10) and “ANALOG+” (TBB #11)
and is self-powered (active) with a compliance of 10 VDC. The analog “-”
outputisisolatedfromthe inputcommon,eliminatingproblemsfromground
loops. Programming of the option is performed in “Pro 8” of the normal
programmingmode.Display valuesaresimply keyedinto providea4mAor
0 VDC output, “AN-Lo”, and a 20 mA or 10 VDC output, “AN-HI”. The
analog output then follows the assigned value and as such will update every
measurement cycle.Nonstandard current or voltage rangescan be supported
by calculating the slope and intercept of the display/output and calculating
therequireddisplayvaluesat4mAor0VDCand20mAor10VDC.Reverse
actioncan beachieved byprogramming a“high”display valuefor “AN-Lo”
and a “low” display value for “AN-HI”.
Ifthedisplayshouldindicatean“OLOLOL”,“ULULUL”,or“SHort”the
analogoutputwillgoto20mAor10VDCforan“OLOLOL”or“SHort”,and
4mAor0VDCfora“ULULUL”.
Note: Analog “-” must be kept isolated from Alarm Comm. (TBB #8).
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ANALOG OUTPUT DIAGRAMS
