Dwyer LTC User Manual
Series LTC Tilt Switch Control Unit
8
-3/4
(
222.25)
8
-1/4
(
209.55)
1-9/32
(32.54)
4
(
101.6)
1
-21/32
(
42.06)
R
ED LENS
G
REEN LENS
9-1/2
(241.3)
4
-7/8
(
123.83)
3
-29/32
(99.16)
6
-3/64
(153.59)
CONTROL UNIT
Specifications - Installation and Operating Instructions
Bulletin L-29
The Series LTC Tilt Switch Control Units feature an adjustable time
delay and a logic selector switch. There are two contacts for connection
to the probe (three contacts for intrinsically safe probes); three for the
input power; and two sets of output contacts, each with one normally
open, one normally closed, and one common. Signal lights, relay, and
transformer are all accessible with the box cover open allowing for easy
maintenance. The controller output is through a relay, which provides a
change in contacts as the probe moves from vertical to tilt and vice
versa. The user may choose to employ either the normally open, normally closed, or both sets of contacts to perform switching operations in
the system. In addition, an adjustable time-delay feature may be
assigned to either the vertical or the tilt position to prevent false signals.
The time delay is adjustable from one to ten (1 to 10) seconds. The relay
assumes the de-energized position upon reaching the end of the delay
period-as well as upon failure of power to the controller.
SPEC
T
we
Po
we
Po
Swit
Ele
c
En
c
En
Ele
o
C
d
In
d
e
R
d
In
Time
D
IN
r
o
N
Ala
WIR
All w
Sta
r
o
F
n
c
c
ic
ic
r
te
lo
lo
d
IC
m
m
IN
co
u
q
e
R
r
s
n
o
C
r
e
p
y
T
h
c
R
l
a
ric
t
: N
re
u
s
R
re
u
s
C
l
a
ric
t
o
C
it
u
L
n
io
t
a
r
n
e
h
w
(
L
n
io
t
a
y
la
e
D
TOR
A
e
r
g
(
l
a
:
)
d
e
r
(
G
sh
g
in
ir
s.
e
d
co
l u
o
tr
n
t
n
me
ire
n
io
t
mp
u
T.
PD
D
:
0
1
:
g
in
t
a
o
n
e
:
e
ig
ig
L
o
n
a
n
1
L
n
o
t
n
h
la
h
IGH
)
ig
u
C
it L
C
r
o
e
n
N
:
g
in
io
t
c
e
n
n
io
t
c
e
e
Gr
:
t
e
d
is
y
we
Po
t
0
1
to
S
T
t
h
ig
L
:
n
o
t
h
in
e
b
ld
is
le
b
a
2
C
T
1
:
imit
L
re
u
t
ra
e
mp
e
the probe wire to the
:
A
o
n
s
se
w
, h
2
:
e
-
o
1
a
n
s
:
e
h
co
co
°F
5
5
1
W
0
1
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o
b
r
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e
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o
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w
(
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e
n
R
r
c. Ad
w
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e
m
n
le
o
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e
m
VAC
.
1
1
n
r
e
n
h
g
r
q
e
e
h
e
r
p
e
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s m
ctr
Ste
N
e
e
ize
u
ju
lia
cte
a
5
EM
w
.
n
stm
n
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u
ica
x
@
VAC
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r
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ire
e
r
y
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(
l
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la
e
a
d
e
la
is
ce
to
l co
2
n
:
w
.
)
°C
z.
H
0
/6
0
5
.
tin
a
co
r
ste
lye
o
p
ith
w
g
sin
u
o
h
.
4
l.
a
in
m
r
ve
e
b
o
r
p
d
n
a
d
ize
g
r
e
n
e
is
y
b
o
r
p
d
VD
8
1
ill
w
t
n
n
e
is
y
e
n
e
-
e
d
a
ith
p
e
th
e
d
a
m
e
ctio
e
n
n
.
)
d
tilte
e
.
C
u
tp
u
o
y
la
e
d
o
r
p
;
d
ize
g
r
e
g
r
p
p
o
r
in
b
n
ize
lica
e
th
s in
o
r
p
;
d
o
L
le
b
.
tr
n
co
e
e
sid
b
t
b
th
ca
ctio
a
y
la
e
r
tica
r
ve
is
e
d
tilte
is
e
e
d
e
l, F
co
it to
n
l u
o
tr
n
co
e
S
ION
T
A
IC
IF
Typically, these holes are made on the bottom surface of the unit.
.
r
g
r
a
o
.
tica
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.
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it.
n
PROXIMITY CONTROLS
A DIVISION OF DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Phone: 219/879-8000 www.dwyer-inst.com
Fax: 219/872-9057 e-mail: info@dwyermail.com
INSTALLATION INSTRUCTIONS
MOUNTING
The control unit should be mounted in an area free from vibration and the
temperature should not exceed 125°F (52°C). Consideration should be
given to mounting the unit where indicator lights will be visible to the necessary personnel, and wiring may be easily installed to the probe and
other machinery.
LOGIC SELECTOR
This jumper determines when the output relay actuates and de-actuates.
The following summarizes the operation with the jumper at each position.
Position 1: Relay energizes when probe is in the vertical
position.
Relay de-energizes when probe is in the tilted
position.
Position 2: Relay energizes when probe is in the tilted
position.
Relay de-energizes when probe is in the vertical
position.
Figure 1: CONTROL UNIT CIRCUIT
PROBE INSTALLATION
The probe should be suspended using a fixed support, such as a mounting bracket and S-hook, at a position where it will easily intercept the bulk
material at the desired indication point. There must be a free flow of
material both to and away from the probe. In some installations, it is necessary to install a baffle or shield above the probe assembly to protect it
from product surges.
MAINTENANCE
The Series LTC Tilt Probe Control Units are not field serviceable and
should be returned if repair is needed (field repair should not be attempted and may void warranty). Be sure to include a brief description of the
problem plus any relevant application notes. Contact customer service to
receive a return goods authorization number before shipping.
©Copyright 2014 Dwyer Instruments, Inc. Printed in U.S.A. 4/14 FR# R6-443489-00 Rev. 1
PROXIMITY CONTROLS
A DIVISION OF DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
Fax: 219/872-9057 e-mail: info@dwyermail.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
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