Th e vo ltage l ev el is bi- direc tiona l and ful ly opto -isolated. It do es n' t
matter wh ic h way yo u conne ct your vol ta ge so urce a cr os s the t ip
and sle ev e of the co nn ector. Neith er side o f the I R- jack is g ro un ded,
and eit he r the t ip or t he sleeve c an b e conne cted to g roun d witho ut
the pos si bilit y of ground l oops.
Th e signal vo lt age can r an ge from + 3V to +15 V or from - 3V to -15V.
Th e IR ja ck rec ognizes the s ame I R co des as th e front pan el IR s en -
sor. I f t he MA S7.1 is taught n ew codes, the se new co de s will be co me
the new c od es recognized by th e IR ja ck.
Note: Th e IR control ja ck option i s mut ua lly exc lu sive with 1 2V
On/Of f co nt ro l opt io n (they u se the sa me jack !) .Only o ne
of thes e options c an be e nable d at a time.
12V On / Off Control
Th e re ar pa ne l jack la beled " IR -IN", when n ot bein g used as a n IR
Jack, can al lo w the MAS7. 1 to be t ur ned o n and off u sing a 12 V con-
tro l voltage.
To enable /d isabl e the 12V O n/O ff control fu nc tio ns , see the s ect io n
entitled: " Co ntrol Fu nctio ns ".
By en ab li ng th e 12V On/ Off c on tr ol option , the MAS7. 1 will tu rn
itself on whenever t he voltag e going i nt o the IR- IN jack g oe s from
LO W to HIGH , and i t will tu rn itse lf off wh en ever the vo lt age goe s
fro m HIG H to LOW.
Th e MA S7.1 on ly looks at transiti on s on th e IR-IN j ac k . For inst an ce if
it detects a LOW to H IGH t ra ns ition i t will tu rn it se lf on. The u se r can
then us e the power s wi tc h to tu rn off th e MA S7.1. After whic h the
vo lt age o n th e IR- IN jack m us t go from H IGH to LO W and the n back
to HIGH, to o nce aga in turn o n the MAS 7. 1.
Th e vo ltage l ev el is bi- direc tiona l and ful ly opto -isolated. It do es n' t
matter wh ic h way yo u conne ct your vol ta ge so urce a cr os s the t ip
and sle ev e of the co nn ector. Neith er side o f the I R- jack is g ro un ded,
and eit he r the t ip or t he sleeve c an b e conne cted to g roun d witho ut
the pos si bilit y of ground l oops.
A HIGH le ve l is any volt ag e from +3 V to +15V, o r any volta ge fro m
-3V to -1 5V.
A LOW level is any vo ltage b etween -0 .2V and + 0.2V.
All level s be tween t hese tw o leve ls is u ndefine d.
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