SIERRA
MONITOR
CORPORATION
INSTRUCTION
MANUAL
LI
PRODUCT
DESCRIPTION
1.1.1
Introduction
The
Model
4011
Single
Channel
Controller
has
been
designed
to
interface
to
an
industry
standard4-
20mA
Module
or
other
standard
Voltage/Current
Modules
(see
Specifications)
and
provide
the
user
with
two
independent
adjustable
alarm
levels.
Each
alarm
level
can
be
programmed
to
be
either
non-Latching
or
Latching
and
can
also
be
programmed
to
activate
either
when
the
input
level
is
GREATER
THAN
the
user
adjusted
alarm
level
or
LESS
THAN
the
user
adjusted
alarmlevel.
When
the
Model
4011
is
used
as
a
4-20m
A
signal
loop
controller
a
third
alarm
is
provided
which
detects
loop
current
being
less
than
3mA.
The
outputs
of
the
three
Alarms
are
SPDT
relays
with
contacts
rating
of
10A
at
28VDC
or
120VAC
and
are
independently
fused
at
5A.
The
front
panel
of
the
Model
4011
consists
of
a
3
1/2
digit
Liquid
Crystal
Display,
three
Alarm
LEDs,
a
Reset
Pushbutton,
four
display
selection
LEDs
and
a
Select
Pushbutton.
The
SELECT
button
steps
the
display
through
one
of
the
four
possible
selections
which
will
be
indicated
by
the
appropriate
illuminated
LED.
The
following
are
the
Display
selections:
CONC:
TheactualconcentrationLevel(Oto
100%
or
PPM).(Factory
Option
Available:
Any
scale
from
0
to
1,990
PPM)
ALM1:
Alarm
Level
1
user
adjusted
Alarm
Level
0-100%
or
PPM).
ALM2:
AlarmLevel2useradjustedAlarmLevel
(0-100%
or
PPM).
LOOP:
Actual
Loop
Current
(4-20mA).
The
three
alarm
indication
LEDs
on
the
front
panel
are
Trouble
(loop
current
less
than
3mA)
Alarm
Level
1
and
Alarm
Level
2.
The
RESET
pushbutton
is
used
to
reset
the
relays
when
the
user
has
selected
Latching
or
Acknowledge
Mode.
The
Model
4011
is
packaged
in
a
1/8
DIN
Enclosure
(1.9H
x
3.8
W
x
6.5D
inches)
and
can
be
panel
mounted.
Wiring
connection
to
the
controller
is
via
a
two
piece
terminal
block
which
allows
disassembly
of
the
controller
without
disconnection
of
individual
wires.
The
controller
is
supplied
in
the
following
configurations.
-Model
4011-00:
Controller
4-20mA
input,
DC,
DIN
-Model
4011-10:
Controller
4-20mA
input,
AC,
DIN
1.1.2
Options
The
following
options
are
available
on
theModel
4011.
A.
Power
Supply
&
Battery
Charger
Model4346:24VDC@
lAmppower
supply
with
a
trickle
charge
battery
charger,
(figure
IB)
Capable
of
po¬
wering
four
Model
4011
controllers.
B.
Battery
12
Volt
6.5
AH
C.
Chart
Recorder
Singlechannel
impact
printchartrec¬
order
with
speed
of
2"
per
hour.
D.
Enclosures
Various
Nema
and
Explosion
Proof
Enclosures
are
available.
Model
Number:
4011
Single
Channel
4-20
mA
Controller
Page:
1
