Varian 990 dCLD II, Operation Manual

Page: 140 / 162

Model 990 dCLD II Component Leak Detector
B-4
B.2
C
ustomer Accessible Output
s
Ta
ble
B
-2 is
a listing of outputs by which
the customer
’s
contr
o
ller
, usually a PLC,
can read informati
on from the 990 dCLD II.
All outputs are opto-isolat
ed emitter
-follower cir
cuits with a 10-
Ohm resistor in the collector
. The resistors are all commoned
and are
co
nnected
to
J3
pins 27
and 2
8
(o
r J2
pin
9 f
o
r th
e
valve
logic
outputs)
l5,
–24 VDC Input. The
customer
must
connect th
e (+) o
f a p
o
wer supply to these pin
s
as the 990 d
C
LD I
I does n
o
t provide power to
the customer side of the
opto-isolat
o
rs. Apply 5 to 24 VDC in all cases unless othe
rwise
noted in the first line of t
h
e behavior discussion.
Ta
ble B-2
C
ustom
er
Ac
cessib
le Ou
tput
s
Conn/P
in
O
u
tput Name
Moment
ary or
Lev
e
l Con
tac
t
5 to
2
4
VDC
De
scr
ipt
ion
Beha
vior
J3
/2
REJECT #1
Le
vel
A
ctive wh
en L
eak Ra
te
is
ove
r
se
t p
o
int
#1
Active when
the
va
lue of th
e lea
k r
a
te exceed
s the
valu
e
se
t
in th
e 1RE
JECT
v
ar
iab
le
.
In
activ
e
when the leak
rate fa
lls
below
the value s
et in
the
1REJECT var
iable
.
J3
/1
4
R
ead
y
L
ev
el
Active
Wh
en
Fil
an
d
T
urb
o
ok
Active
when
the
9
9
0 d
C
LD
II h
a
s su
ccessfu
lly com
p
leted
st
ar
ting
. This in
clude
s
th
e tu
rbo
p
u
mp
achie
vin
g sp
eed
, th
e
sp
ec tu
be pr
essur
e
be
ing low en
oug
h to
su
ppo
rt th
e ion
so
ur
ce
fila
men
t an
d th
e ion
sou
rce e
m
issio
n
loop
run
n
in
g.
It
be
co
mes
inactive
if, dur
ing
n
o
rm
al op
er
ation
, the tur
bo
pum
p
fa
ult
s, the
ion
sour
ce
fila
men
t b
u
rn
s o
u
t,
the
spe
c
tu
be
r
e
ceives a pr
essu
re
b
u
rs
t, th
e 990
dCLD
II
ha
s
re
ce
ive
d
an
IDLE or
F
IL
OFF comma
nd
, or
th
e power
is
interrupted.
J3
/1
5
Z
er
o
ing
L
eve
l
A
ctive
w
he
n
pe
rf
or
m
ing
Z
e
ro
Ac
tive
wh
e
n
th
e
99
0
dC
LD
II
is in
t
he
p
ro
ce
ss
of
ze
ro
ing
th
e lea
k r
a
te.
T
h
is
ha
ppen
s whe
n
th
e ZERO co
mma
nd is
invoked
a
nd a
t the en
d of an INTERNAL, NORMAL
ca
libration.
J3
/16
L
eak
Rate
Update
V
a
lid
dat
a
on B
CD w
hen low
A
ct
ive
du
ring
th
e tim
e
th
at th
e
BCD leak ra
te
outpu
t is
ch
an
ging
. It is an ind
ication tha
t the custome
r sh
ou
ld not
re
ad
the
BCD d
a
ta
un
til this
ou
tp
ut b
e
come
s
inactive
.