Monitor SiloPatrol Se Guide

SiloPatrol®SE Silo Monitoring Unit (SMU)
BUL L E T I N
344A
I N S T A L L A T I O N & O E R A T I O N
®
Thank you for purchasing a quality product manufactured by Monitor
Technologies LL . We realize that you do have a choice of vendors
when procuring level measurement equipment and we sincerely appre-
ciate your business!
This manual contains the information necessary to ensure a safe and
successful installation. Please read and comply with the section on page
14 of this manual pertaining to SAFETY. Doing so will ensure proper
operation of the equipment and the safety of all personnel.
Before discarding the shipping container, please inspect it thoroughly
and verify that all parts ordered are accounted for. Observe the specifi-
cation label on the SMU cover. Verify the voltage, output type, cable
type, cable length, flange style, and location approval (ordinary or haz-
ardous). All SMUs are shipped with a standard plumb bob to ease instal-
lation. If an alternate plumb bob is ordered, it will be packed separately.
See Mechanical Installation section for method to change plumb bob.
In the event that information contained herein does not completely sat-
isfy your requirements or answer your questions, you may contact
Technical Support on our website www.monitortech.com, by telephone
at 800-766-6486 (630-365-9403), or by fax at 630-365-5646. If your
SMU ever requires service either in or out of warranty, please contact us
and obtain an RMA number prior to shipping the unit to us.
www.monitortech.com
SMU
GDR JSC NOV 1 2013 DOC-001-344A 16

2
Choosing a Location for SMU (See Figure 1 and 2)
1) Environment - SMUs can be configured for ordinary locations
or hazardous locations. The application location must comply
with the SMU classification listed in the specifications. All
SMUs are weatherproof and therefore suitable for outdoor
applications. Note the temperature limits in the specifications.
2) lacement - onsider the affect that the material's angle of
repose will have on the operation. The SMU will measure the
material height directly below its mounting. For center-fill and
center-discharge vessels, the volumetric average can be
attained by mounting the SMU at a distance equal to 1/6
the vessel diameter away from the outer edge of the vessel.
Mount SMU away from internal obstructions and away from
areas where in-flow of material may directly contact the
plumb bob during operation. Insure the cable length will not
cause plumb bob extension into augers, slide gates or feed-
ers. This measurement device can not factor varying angles of
repose in it’s calculated volumetric displays representing the
material being measured if it is solid as opposed to liquid.
3) lumb - The SMU must be mounted plumb (perpendicular to
the ground) within 1 degree. Do not mount the SMU on an
angle. Build an adapter or consider use of a 5 degree or 10
degree flange which can be supplied by Monitor. If the angle
of the roof is unknown, use Figure 1 to approximate. Each 1
inch (25.4 mm) of drop per 11.5 inches (292 mm) of horizon-
tal movement represents approximately five degrees.
PR E-I NS AL LA IO N CO NS ID ERA I ONS
Figure 1
Figure 2
DIMENSIONS ARE SHOWN IN INCHES WITH MILLIMETER EQUIVALENT IN BRACKETS
Once a measurement cycle is initiated, the SiloPatrol® SE
SE
sensor (SMU) “smart” motor system controls the descent
of a plumb bob, attached to a heavy-duty stainless steel
cable, into the vessel. The SMU measures the amount of
cable dispensed via its unique optical sensing system.
The SMU’s optic system is completely sealed from the
internal environment of the electronics compartment,
which is isolated and sealed from material ingress in the
mechanical compartment, to ensure long-term reliable
operation.
The descent of the bob is maintained at an optimal speed
by the “smart” motor control system, contributing to the
elimination of cable slack and maximizing the motor life. In
conjunction with the unique dual optical sensing system,
the “smart” motor control system guarantees that the bob
will stop when it contacts the material surface and elimi-
nates the need for a mechanical brake. When the bob
reaches the material surface, the SMU reverses the direc-
tion of the motor and transmits the distance value.
During the ascent of the bob, the SMU measures the
amount of cable gathered and controls the speed of
ascent. This ensures proper cable wrapping in the patent-
ed storage reel and tangle-free operation.
The second edition SMU also includes a patent pending
Hall effect sensor array that monitors the movement and
position of the swing-arm that controls the absorption of
slack in the cable system during descent and ascent. The
second edition SMU is smarter than ever and uses this
technology to control the cable and plumb bob travel to
ensure reliability of the measurement cycle, even with
harsh changing conditions in the most severe applications.
The standalone versions of the SMU generate their
respective 4-20mA or Pulse output in response to a meas-
urement query, or automatically with the analog output ver-
sion. The standard “smart” RS485 SMU communicates
with the operator interface chosen for the system (HMI2or
SiloTrack™P software). These operator interfaces can
perform calculations and conversions to display the data in
the format desired. The SiloPatrol SE SE system, if so
equipped, will also generate auxiliary analog and/or relay
outputs. RS485 communications can be accomplished via
hardwiring or with wireless transceivers.
PR INC IP LE OF O PE RA IO N

3
General (All SMUs) (See Figure 4)
1) Dust-Ignition- roof recautions - When installing a haz-
ardous location SMU, observe all regulations applicable to
local codes. Do not remove side covers with power
attached in the presence of an hazardous atmosphere. When
reattaching covers, insure that gaskets are clean and that
screws are fully engaged. Tighten in a criss-cross pattern.
2) Factory Wiring/Compartment - The SMU motor, encoder,
and swing arm sensor leads are prewired to the P B module.
DO NOT alter or make additional external connection to these
terminals. Doing so will likely cause damage to the SMU. Do
not remove cover protecting the optical sensing compartment.
3) ermanently Connected Equipment - Disconnecting
devices shall be included in the system installation. In instal-
lations where multiple circuits are used (i.e. independent cir-
cuits for power input, cycle, count, sound and lockout), indi-
vidual disconnects are required. The disconnects shall be
within close proximity of the equipment, accessible to
operators, and marked appropriately . Assure the disconnect
ratings are appropriately sized for the circuit protected
(See Specifications).
4) Circuit Separation - Two cable entry locations are provided
to aid in maintaining separation of "hazardous live" and limit
ed circuits . It is required that all wiring have an insulation
rating of 300V minimum, and a temperature rating of 80˚
(176˚ F) minimum.
5) rotective Earthing - Each SMU is provided with a "pro-
tective conductor terminal" which shall be terminated to the
local earth ground potential. Select a wire size that can carry
in excess of the sum of all circuit's maximum amperage.
ATEX Supplemental instructions (Electrical Installation)
See Bulletin 344K
Figure 4
ADV M0050
3.50 x 4.00
--
04/04/06
COVER
TRANSFORMER
PROTECTIVE
CONDUCTOR
(230VAC MODELS ONLY)
TERMINAL
FACTORY WIRING
DO NOT ALTER!
OPTICAL
COMPARTMENT
DO NOT REMOVE
ELECTRICAL INSTALLATION
CABLE
ENTRIES
ME CHA NI CA L IN S ALL A ION
SMU Mounting (See Figure 3)
1) Location - Select a mounting location in accordance with the
Pre-Installation onsiderations.
2) reparation - If using Monitor's K-style flange (flat, 5 degree
or 10 degree pitch), cut a 5-1/2 inch (133 mm) diameter cen-
ter hole and drill six 11/32 inch (9 mm) diameter mounting
holes (for 5/16" bolts) on a 7 inch (178 mm) bolt circle.
3) Mounting - Install gasket, place plumb bob in center hole and
secure flange with 5/16" bolts.
4) Other flanges - If mounting of the SMU is done via an ANSI
or similar flange, insure that the center bore on the flange is
sized to mate with the 2" NPT standpipe.
5) Non-standard plumb bobs - Plumb bobs greater than 5 1/2
inch (133 mm) in diameter must be attached to the SMU after
mounting. A standard plumb bob is provided with each SMU.
To change the plumb bob, first install the SMU which will
insure that the cable will not become tangled during the plumb
bob exchange. Use the "motor control switches" to lower the
standard plumb bob in the vessel (See Setup section for
details). Then pull the standard plumb bob out through an
access hatch/vent. All bobs are held on to the cable by a split-
ring fastener. Remove standard plumb bob from split-ring and
reattach appropriate plumb bob. Gently release plumb bob
into vessel then press the "system reset" switch to pull plumb
bob back to start position.
6) Cover attachment - Both side covers are identical. Each is
retained by 4 socket head cap screws. These 5/16 -18
screws can be removed by a 1/4" Allen key.
ATEX Supplemental Instructions (Mechanical Installation)
See Bulletin 344K
Figure 3
SMU MOUNTING &
PLUMB BOB ATTACHMENT
[XXmm]
XX"
UNITS UNLESS SPECIFIED
ADV M0045
3.50 x 4.00
REV A
02/14/07
.34 [9.0] HOLES
CONDUIT ENTRIES
(2) 3/4" NPT
S.H.C.S., 5/16
MECHANICAL SIDE
WIPERS
(4) SCREW,
(FOR 5/16" BOLTS)
2" NPT
CONNECTION
ON 7.00 [178.0] B.C.
ATTACHMENT
SPLIT RING FOR
PLUMB BOB (6)
(4) SCREW,
S.H.C.S., 5/16
ELECTRICAL SIDE
EL EC RI CAL IN S A LL A I ON

4
SMU RS-485 Model (See Figure 5)
1) ower Input - The SMU is designed to accept either 115VA or
230VA (factory set). Verify the intended voltage supply is com-
patible with the voltage configuration indicated on the electron-
ics and the external nameplate. onnect power as shown to
"L1" and "N" being sure to observe polarity. The connector can
be unplugged from the bottom P B for your wiring convenience.
2) RS-485 Network - The SMU interconnection of the network is
made with a 2-conductor shielded cable (such as Belden
9322). All SMUs are interconnected in a daisy-chain, multi-
drop configuration. Order of connection is not important (i.e.
the HMI2can be connected between SMUs if necessary). A
communication network such as this operates most effective-
ly when the interconnection has only two ends. "T"s should
be avoided whenever possible. Observe polarity when
making the communication interconnection (+D and -D).
Attach the cable shield in the terminal identified as "SHD". Do
not run communication cable in the same conduit as power.
3) Lock Out - The "lockout" input can prohibit the SMU from
making a measurement cycle (i.e. protection against taking
measurement during a filling cycle). If a "lockout" signal is
provided while a measurement cycle is already in process,
the plumb bob will immediately return to the start/socket posi-
tion. The lockout function is activated when a voltage is pro-
vided to either "Vhi" (98-265VA /D ) or "Vlo" (20-55VA /D )
with respect to the " OM" terminal. The SMU lockout circuit
is "dry" meaning that the voltage must be provided for opera-
tion (i.e. just making a switch connection between "Vhi" and
" OM" will not lockout the SMU operation). Refer to the
Specifications section for electrical ratings.
Figure 5

5
SMU ulse/Retro Model (See Figure 6 and 7)
1) ower Input - The SMU is designed to accept either 115VA
or 230VA (factory set). Verify the intended voltage supply is
compatible with the voltage configuration indicated on the
electronics and the external nameplate. onnect power as
shown to "L1" and "N" being sure to observe polarity. The
connector can be unplugged from the bottom P B for your
wiring convenience.
2) Sound - The "sound" input starts the SMU measurement by
an external contact closure (switch). The external switch
must provide voltage to either "Vhi" (98-265VA /D ) or
"Vlo" (20-55VA /D ) with respect to the "com" terminal. The
SMU sound circuit is "dry" meaning that voltage must be pro-
vided to the circuit (i.e. just making an switch connection
between "Vhi" and "com" will not start the SMU). In PL sys-
tems, it is permissible to start all SMUs with a single switch
(parallel wiring to each SMU), but this requires each count
output to be wired and accumulated independently. Refer to
the Specifications section for electrical ratings.
3) Relay Output - The "Relay Output" is an isolated switch
which is closed whenever a measurement is being taken (i.e.
plumb bob is traveling within the vessel) and open whenever
the SMU is idle. Use of this output is optional. The SMU
"relay output" circuit is "dry". Direct connection of voltage
between N/O and OM terminals will damage the output. A
voltage with a series load must be wired to the "relay output".
See Specifications.
4) Count - The " ount" outputs (Low-Volt ount and Hi-Volt
ount) are isolated solid-state switches. Each output
closes/opens for every 0.1 ft/0.1 m (as selected by the reso-
lution switch on the SMU) that the plumb bob travels toward
the material surface within the vessel. The SMU count cir-
cuits are "dry". Direct connection of voltage between N/O and
OM terminals will damage the output. A voltage with a
series load must be wired to either "count" output. In PL
systems, it is permissible to interconnect all SMU count
outputs of similar voltage in parallel configuration, however,
only one SMU can be operated at a time (i.e. independent
sounding of SMUs). Refer to the Specifications section for
electrical ratings.
5) Lock Out - The "lockout" input can prohibit the SMU from
making a measurement cycle (i.e. protection against taking
measurement during a filling cycle). If a "lockout" signal is
provided while a measurement cycle is already in process,
the plumb bob will immediately return to the start/socket posi-
tion. The lockout function is activated when a voltage is
provided to either "Vhi" (98-265VA /D ) or "Vlo" (20-
55VA /D ) with respect to the " OM" terminal. The SMU
lockout circuit is "dry" meaning that the voltage must be
provided for operation (i.e. just making a switch connection
between "Vhi" and " OM" will not lockout the SMU opera-
tion). Refer to the Specifications section for electrical ratings.
Figure 6

SMU Analog(4-20mA) Model (See Figure 8)
1) ower Input - The SMU is designed to accept either 115VA
or 230VA (factory set). Verify the intended voltage supply is
compatible with the voltage configuration indicated on the
electronics and the external nameplate. onnect power as
shown to "L1" and "N" being sure to observe polarity. The
connector can be unplugged from the bottom P B for your
wiring convenience.
2) Sound - The "sound" input starts the SMU measurement by
an external contact closure (switch). The external switch
must provide voltage to either "Vhi" (98-265VA /D ) or
"Vlo" (20-55VA /D ) with respect to the "com" terminal. The
SMU sound circuit is "dry" meaning that voltage must be pro-
vided to the circuit (i.e. just making an switch connection
between "Vhi" and "com" will not start the SMU). It is permis-
sible to start all SMUs with a single switch (parallel wiring to
each SMU). Refer to Specifications section for electrical
ratings.
3) Relay Output - The "Relay Output" is a programmable isolat-
ed switch. See Figure 12 for description of programmable
functions. The SMU "relay output" circuit is "dry". Direct con-
nection of voltage between N/O and OM terminals will dam-
age the output. A voltage with a series load must be wired to
the "relay output". Refer to the Specifications section for
electrical ratings.
6
4) 4-20mA - The "4-20mA" output is an isolated, self-powered
current loop. The term "self-powered" refers to the ability of
the SMU to create the 4-20mA signal without needing an
external power supply. The "self-powered" current loop can
drive up to 500 ohms of loop resistance before degradation of
the current output begins. The 4 and 20mA limits (relating to
material levels) are established through the programming as
explained in the Setup section of this manual. Each SMU 4-
20mA output must be kept independent from each other.
Observe polarity when connecting to the "+" and "-" ter-
minals. Refer to Specifications section for electrical ratings.
5) Lock Out - The "lockout" input can prohibit the SMU from
making a measurement cycle (i.e. protection against taking
measurement during a filling cycle). If a "lockout" signal is
provided while a measurement cycle is already in process,
the plumb bob will immediately return to the start/socket
position. The lockout function is activated when a voltage is
provided to either "Vhi" (98-265VA /D ) or "Vlo" (20-
55VA /D ) with respect to the " OM" terminal. The SMU
lockout circuit is "dry" meaning that the voltage must be
provided for operation (i.e. just making a switch connection
between "Vhi" and " OM" will not lockout the SMU
operation). Refer to the Specifications section for
electrical ratings.
Figure 7

7
SMU RS-485 Model (See Figure 9)
1) SMU Address Selection Switch - Each SMU must be given
a unique network address which is determined by the rotary
switch within the SMU. The network address corresponds
with the HMI2channel number. ommunication errors will
occur if multiple SMUs have the same network address. Note
that the selected switch setting is denoted by the "arrow/dot"
on the shaft, not the slot in the shaft. Switch selections 1-9
refer to channels 1-9, switch selections A, B, , D, E, F, and
0 refer to channels 10-16. ommunication problems will
occur if multiple SMUs have the same address on the
same RS-485 network.
NOTICE: The RS-485 version of the SMU SE and the RS-
485 version of Flexar®may coexist on the same RS-485
communications network if HMI2is the operator interface.
(Please see Bulletin 344B for specific programming information.)
The RS-485 version of the SMU SE and the RS-485 Flexar
cannot coexist on the same RS-485 communications
network if SiloTrackTM software is the operator interface.
2) SMU Network Termination Switch - Each SMU has a net-
work termination switch in close proximity to the RS-485 net-
work terminal block. The two instruments positioned at the
network ends must have their termination switches "on". The
rest of the devices on the network must have their termination
switches "off". Improper setup of the termination switches
rarely results in network failure, but the system will not be as
robust as it could be. Occasional communication problems
could arise.
3) SMU Indicators - Four LEDs depict the status of the SMU.
" ycling" (red): When illuminated, it indicates that power is
applied to the SMU motor. "Down" (green): When illuminat-
ed, it indicates that the SMU plumb bob is descending toward
the material. "Up" (yellow): When illuminated, it indicates
that the SMU plumb bob is ascending toward the home
position. When the unit is powered and at the home position,
only the "Up"(yellow) will be illuminated. "Lockout" (red):
When illumintated, it indicates that the SMU has received a
signal on "lockout" input terminal and that measurement
cycles will be prohibited. When flashing, it indicates that a
start (sound) command is being requested (either manually
through Manual Start Switch or from HMI2/SiloTrack).
4) SMU Control Switches - If necessary, a SMU measurement
can be initiated at the sensor by pressing the "Manual Start
Switch". A complete measurement cycle will occur. In addi-
tion, the control of the motor can be overridden by the "Motor
ontrol Switches" (up and down). These are useful when
servicing the SMU's cable, wiper seal or plumb bobs. The
"Motor ontrol Switches" must be continuously pressed to
achieve the desired up or down control. are should be
taken when these switches are used as all material or
socket sensing capability is disabled.
SE U P
Figure 8

Figure 9
Figure 10
Figure 11
8
SMU ulse/Retro Model (See Figure 10)
1) Resolution Selection Switch - The resolution of the pulse
output can be selected with this switch. That is, each pulse
transmitted from the SMU will represent how much cable has
been dispensed during the measurement. Select either the
0.1 ft or 0.1 (dm) position.
2) SMU Indicators - Seven LEDs depict the status of the SMU.
" ycling" (red): When illuminated, it indicates that power is
applied to the SMU motor. "Down" (green): When illuminat-
ed, it indicates that the SMU plumb bob is descending toward
the material. "Up" (yellow): When illuminated, it indicates
that the SMU plumb bob is ascending toward the home posi-
tion. When the unit is powered and at the home position, only
the "Up"(yellow) will be illuminated. "Lockout" (red): When
illumintated, it indicates that the SMU has recevied a signal on
"lockout" input terminal and that measurement cycles will be
prohibited. When flashing, it indicates that a start (sound)
command is being requested. “Sound”(red): When illu-
minated, it indicates that a “start measurement” signal is
present on the one of the “sound” terminals. Since the SMU
can be started by a momentary input signal, and illuminated
LED may only appear briefly. “Relay”(red): When illuminated,
it indicates that a measurement is in process.
3) SMU Control Switches - If necessary, a SMU measurement
can be initiated at the sensor by pressing the "Manual Start
Switch". A complete measurement cycle will occur. In addi-
tion, the control of the motor can be overridden by the "Motor
ontrol Switches" (up and down). These are useful when
servicing the SMU's cable, wiper seal or plumb bobs. The
"Motor ontrol Switches" must be continuously pressed to
achieve the desired up or down control. are should be
taken when these switches are used as all material or
socket sensing capability is disabled.
SMU Analog(4-20mA) Model (See Figure 11)
1) Calibration Controls – Programming of various functions is
done through two pushbutton switches and a rotary selector.
To view/change parameters, press and hold the PARAM
switch. Then rotate the rotary selector ADJUST until the
desired parameter is displayed on the top line of L D. The
bottom line of the display will indicate the “value” (selection)
programmed for that parameter. To change/view other
“values”, press and hold the VALUE switch. Then rotate the
rotary selector ADJUST until the desire value is displayed on
the bottom line of L D. Once all parameters are set, place
parameter to “RUN” position.
2) SMU Indicators - Six LEDs depict the status of the SMU.
" ycling" (red): When illuminated, it indicates that power is
applied to the SMU motor. "Down" (green): When illuminat-
ed, it indicates that the SMU plumb bob is descending toward
the material. "Up" (yellow): When illuminated, it indicates
that the SMU plumb bob is ascending toward the home posi-
tion. When the unit is powered and at the home position, only
the "Up"(yellow) will be illuminated. “Lockout”(red) and
“Sound”(red): See explanation above. “Relay”(red): When
illuminated, it indicates that the relay is energized according to
programmed function (See Figure 12).
3) SMU Control Switches - See explanation above.

9
SMU ANALOG (4-20mA) PROGRAMMING PARAMETERS
Parameter Input Range (Select ons) Default Descr pt on
Run n/a Indicates the Standard perating Mode which
displays the last measurement cycle.
Val 4mA 1.00 to 150.00 ft 1.00Ft Defines distance from start/socket position
(0.25 ft increment) that represents the 4mA signal.
Val 20mA 1.00 to 150.00 ft 150.00Ft Defines distance from start/socket position
(0.25 ft increment) that represents the 20mA signal.
Tr m 4mA -20 to +20 0 Defines a calibration factor that can be used to
(1 increment) fine tune the 4mA output (zero) value.
Tr m20mA -20 to +20 0 Defines a calibration factor that can be used to
(1 increment) fine tune the 20mA output (span) value.
S g Updt Continue: Update output Continue Defines when the 4-20mA signal delivered to the
continuously through output terminal block.
measurement cycle
E T: Update output only when
material surface (End f Travel)
is reached
Err S g none: utput not affected by errors none Defines how the 4-20mA signal will be
less 2mA: utput will influenced by any errors that are detected during
change to <2mA if an error is detected a measurement cycle. Applicable errors
gtr 23mA: utput will include Index, Return, Motion, Lockout
change to >23mA if an error is and Genesis.
detected
AutoT me ff: n-board timer is turned-off ff Defines whether or not the on-board timer is
n: n-board timer is turned-on used to start measurement cycles.
Tm Inter 0.25 to 168.00 hrs 24 Hrs Defines time interval between measurement
(0.25 hrs increment) cycles. The time interval references an
Note: 168 hours represents 1 week on-board timer and does not reference a
real-time clock. To synchronize timer with
current time, momentary press the
System Reset Switch.
CycL m t 1.00 to 150.00 ft 150.00Ft Defines the measurement cycle distance
(0.25 ft increment) (depth) that is allowed before the SMU
automatically returns the plumb bob to
the start/socket position. Can be used to
prevent plumb bob descent into regions of
vessel without shortening cable.
Rly Mode Cyc per: Relay activated while Cyc pr Selects how the relay output will be influenced
measurement cycle is taking place by the measurement cycle.
Lo Thres: Relay activated (N/
closed) when measurement Applicable errors that will influence output in Err
distance is greater than threshold value Det mode include Index, Return, Motion,
Hi Thres: Relay activated Lockout and Genesis.
(N/ closed) when measurement
distance is less than threshold value
Err Det: Relay activated
when an error is detected
Rly Thrs 1.00 to 150.00 ft 150.00Ft Selects distance from start/socket position that
(0.25 ft increment) is used to determine relay status when Lo Thres
or Hi Thres is selected in Rly Mode parameter.
Cyc Good Read only (values up to 999,999) n/a Displays # of good cycles made with SMU.
Cyc Err Read only (values up to 999,999) n/a Displays # of cycle errors made with SMU.
Software Read only (version V#.##) n/a Displays software version of micro-processor.
F gure 12

10
General Operational Guidelines - All versions
1) Operation duty cycle - Although the SMU has passed tests
that have accumulated over 150,000 operations, it is recom-
mended that the SMU be utilized as a periodic measurement
device. Applications requiring measurement more than fifty
times in a 24 hour period are not recommended. However,
there are no physical limitations to the number of operations
which can occur in one hour (i.e. the motor can run continu-
ously and not overheat). For a fully continuous measurement
device, consult the factory for other technologies.
2) Measurement rate - The average measurement rate of an
SMU is influenced by the amount of cable on the storage reel.
The speed of the plumb bob descent and ascent is faster
when more cable is wound on the storage reel. The rate of
plumb travel can range from 1.0 ft/second to 1.5 ft/second
(300-450 mm/second).
3) Application restrictions - The SMU is equipped with a motor
and spring tension system which is designed to maximize the
pull-out capacity in the event that a plumb bob becomes
entangled or buried. The SMU has been successfully tested
for operation in silo filling cycles in free flowing material appli-
cations. In applications where severe bridging or clinging
occurs, it is not recommended to operate during a filling oper-
ation. onsult the factory additional recommendations.
Operation of SMU/HMI2System
1) Ensure SMU network address is set and that the HMI2chan-
nel is active.
2) Press MEAS to enter the measurement mode.
3) Use number pad to enter channel number, or use arrow key
to select "all" channel read.
4) Press ENTER.
5) If SMU is in “LO KOUT” status, the SMU will not operate and
a message denoting such will be indicated on the HMI2display.
6) If SMU is not in “LO KOUT” status, the SMU's plumb bob will
descend as depicted by "i" on HMI2display.
7) Upon material contact the new measurement will be dis-
played and the plumb bob will ascend as depicted by the "h"
on the HMI2display.
8) Once returned to the start/socket position, the "h" will disap-
pear. If any errors were detected, they will be indicated on the
HMI2. The following error conditions are analyzed and dis-
played if applicable.
om Error: ommunication between HMI2and SMU is
faulty
Return Error: The measurement of descent was greater
than the ascent
(If > 4” (100mm)+1% upward travel)
Index Error: The measurement of ascent was greater than
the descent (If > 4” (100mm))
Motion Error: The plumb bob did not move upon initiation of
a measurement cycle. (If < 4” (100mm))
OP ERA I ON
Operation of SMU ulse/Retro Output
1) Ensure the SMU is setup to output 0.1 ft or 0.1 m pulses as
selected by the resolution switch.
2) Initiate an SMU measurement with a contact closure on the
applicable sound input.
3) SMU's plumb bob will descend. ounts will begin to flow from
SMU. The Relay output will be closed depicting a
measurement is in process.
4) Upon material contact the plumb bob will ascend. ounts
may continue to flow during a short portion of the plumb bob
ascension due to an intentional built-in time lag which ensures
accurate accumulations of counts on legacy M consoles.
5) Once returned to the start/socket position, the Relay
output will be opened.
Operation of SMU Analog(4-20mA) Output
1) Ensure the SMU is setup to correlate the 4mA and 20mA val-
ues to subsequent vessel values.
2) Initiate an SMU measurement with a contact closure on the
applicable sound input.
3) SMU's plumb bob will descend and the measurement process
will begin.
4) Upon material contact the new measurement will be output as
a 4-20mA signal and the plumb bob will ascend. The SMU
calculates between a range of 3-21.5 mA.
5) Once returned to the start/socket position, the following error
conditions are analyzed then indicated by the selected fail-
safe limit if applicable. If an error is detected, the 4-20mA
output will respond per the programmed parameter
named “Err Sig”.
Return Error: The measurement of descent was greater
than the ascent (If > 4” (100mm)
+ 1% upward travel)
Index Error: The measurement of ascent was greater than
the descent(If > 4” (100mm))
Motion Error: The plumb bob did not move upon initiation of
a measurement cycle. (If < 4” (100mm))
Operation of SMU/SiloTrack™ System
See Bulletin 344D(SiloTrack V 1.0) or 344G(SiloTrack V 2.0)
or Bulletin 344J(SiloTrack V 3.X).
Fuse Replacement
The fuses incorporated into the SMU P Bs are not intended for
operator replacement. Direct access to the fuses is restricted. A
qualified tecnician can replace the applicable fuse(s) according
to the following specifications. If necessary, consult the factory
for additional technical assistance or for return of SMU.
115VA
F1: 5x20mm, 0.63A Time Lag (Slo-Blo), 250VA
LittelFuse #218.630 or Bussmann #GD -630mA
F2, F3: 5x20mm, 0.2A Time Lag (Slo-Blo), 250VA
LittelFuse #218.200 or Bussmann #GD -200mA
230VA
F1: 5x20mm, 0.315A Time Lag (Slo-Blo), 250VA
LittelFuse #218.315 or Bussmann #GD -315mA
F2, F3: 5x20mm, 0.1A Time Lag (Slo-Blo), 250VA
LittelFuse #218.100 or Bussmann #GD -100mA
MA IN EN AN CE

11
reventive Maintenance
The SMU design is virtually maintenance free. Applications with
airborne dust within the vessel should be setup on a periodic
maintenance schedule to insure optimum performance.
Evaluation should be conducted twice a year. General interior
cleaning and/or cable and wiper seal replacement as described
below should be the primary emphasis.
Cleaning Requirements
Insure cover gaskets remain clean so hazardous/environmental
protection is maintained. If necessary, remove excess dust from
inside the SMU with compressed air. Insure all mechanical parts
can rotate/swing freely. If necessary, replace the wiper seal as
described to insure free cable travel. Remove any material build-
up which may occur on the plumb bob.
ATEX Supplemental Instructions (Maintenance)
See Bulletin 344K.
Cable and wiper seal replacement
1) Manufacturer observations - able life can last over
100,000 operations. However, in applications with coarse
material or temperature swings, life can be reduced. ables
that are kinked, frayed or which have peeling of the jacket
require immediate replacement to ensure proper operation.
2) Target operation - Reliable operation requires a damage-
free cable which can easily navigate through the wiper seal,
around the cable rollers and onto the storage wheel. ables
should pass through wipers without any resistance.
Cable Replacement rocedure
1. Access plumb bob: Press the "Down" motor control switch
until enough cable is spooled out so the plumb bob can be
accessed from a port on the vessel. Disconnect power plug.
2. Remove cable: ut the cable just above the thimble at the
plumb bob end. Retain hardware. Remove the storage
wheel cover by removing the four screws. Remove cable
from the SMU.
3. Remove wiper seals: Remove the wiper seal cover. Pull
out wiper seals. lean wiper seal compartment. Do not
install wiper seals at this time.
4. Attach cable to hub: Insert cable into slot of reel hub. Loop
the cable over the closest casting boss. Secure cable with
one compression sleeve. Replace storage reel side cover
and route cable around lower corner roller.
5. Spool cable: Reapply power to the SMU. Motor will briefly
start pulling in cable. Press the "Up" motor control switch and
allow motor to wind cable onto storage reel in even manner.
Release switch when there is just enough cable to perform
the actions outlined in steps 6 and 7 below.
6. Route cable: Position cable around rollers, measuring
wheel and through the wiper seal compartment and mounting
flange. Do not install wiper seals yet.
7. Reattach plumb bob: Pass cable through two compression
sleeves, around thimble and back through compression
sleeves. rimp compression sleeves.
8. Install wiper seals: Install wiper seals as explained in the
Wiper Seal Replacement section.
9. Re-establish operation: Remove all slack from cable and
be sure it passes freely through both wipers. Press System
Reset Switch and allow SMU to fully wind cable onto
storage reel.
Wiper Seal Replacement (See Figure 13)
1. Create cable stack: Press the “Down” motor control switch
so plumb bob is not socketed and until there is enough cable
slack to allow setting the plumb bob aside.
2. Wiper removal from the cartridge: Grasp the cable from
between the two wipers and pull toward you in direction of
arrow “A” while also pulling on the wipers. There is a slot on
the Viton®wiper that must be aligned parallel with the cable
(facing toward the back of the cartridge). It is necessary for
the cable to be aligned and somewhat embedded in the slot
in order to remove the wiper without pinching the cable. The
brush wiper can be pulled out regardless of alignment.
3. Wiper removal from cable:
Viton wiper: Firmly pull cable through the slot in direction of
arrow “B”.
Brush wiper: Spread open the wiper enough to pull cable
through.
4. Install replacement wipers or cleaned originals:
Brush wiper: Spread open the wiper enough to pull cable
through and slide it onto the cable until centered and reclose.
Viton wiper: Firmly pull cable through the slot until the cable
pops into the center hole. Do not flex or bend this wiper or the
bond between the metal and rubber components may be
compromised.
5. Install wipers in cartridge slots:
Viton wiper: Align the wiper so that the slot faces the back of
the cartridge (direction of arrow “B”). Align the cable parallel
over the slot so that it almost lies in the slot. This is necessary
to prevent the cable from getting pinched or jammed between
the wiper and the cartridge slot. Slide the wiper into the
cartridge slot. The cable must move freely through the hole
once installed.
Brush wiper: Slide the wiper into the cartridge slot while
slowly rotating the wiper around the cable. Rotating the wiper
helps keep the bristles from getting hung up on the front edge
of the cartridge slot. Installed correctly, the wiper should be
fairly easy to revolve around the cable.
6. Re-establish operation: Remove all slack from cable and be
sure it passes freely through both wipers. Press System Reset
Switch and allow SMU to fully wind cable onto storage reel.
B
WIPER SEAL MAINTENANCE
A
ADV M0058
3.50 x 3.00
--
04/04/06
CARTRIDGE
Figure 13
VITON WIPER
BRUSH WIPER

12
UNJKT SS (R0421-001)
POLY-JKT (R0321-003)
NYLON-JK (R0321-002)
(6-1162)
MOTOR ASSY
115V (6-8019)
TRANSFORMER ASSY
(230VAC MODELS ONLY)
(6-1152)
230V (6-8029)
(6-3258)
STANDPIPE ASSY
(6-3112)
CODEWHEEL
4~20,
(6-4007)
OPTICS BOX
COVER,
(6-8031)
ENCODER
OPTICAL
(6-8034)
SENSOR
SWING ARM
MODULES
SMART, 115V (6-8017)
SMART, 230V (6-8027)
RETRO, 115V (6-8018)
RETRO, 230V (6-8028)
4~20,
CABLE
COMPRESSION SLEEVE
FOR UNJKTED (6-0047)
FOR JKTED (6-0064)
COVER SCREWS
(6-0052)
COVER ASSY
(6-3257)
ADV M0013
3.50 x 4.00
--
04/04/06
ADV M0012
3.50 x 4.00
--
04/04/06
WIPER SEALS
VITON (6-2094)
BRUSH (6-2095)
FLANGE
(6-0086)
SPLIT RING FASTENER
CABLE THIMBLE
(6-0065)
(6-0055)
(6-3103)
PLUMB BOB
WIPER SEAL
STORAGE REEL ASSY
(6-3220)
(6-2087)
ROLLER
(6-3204)
CABLE SWIVEL
WHEEL ASSY
(6-3229)
SWING ARM ASSY
(6-0051)
TAKE-UP SPRING
(6-0056)
WEAR PLATE
(6-2075)
COVER SCREWS MEASURING
INTENSIFIER SPRING
(6-0057)
SMU Replacement arts (Electrical Side)
SMU Replacement arts (Mechanical Side)
ROBLEM: The SMU will not make a measurement
CAUSE/SOLUTION:
1. (All models) Lockout feature is “active”. Remove "lockout"
signal from the lockout terminal block.
2. (RS-485) The address of the SMU and the HMI2channel
do not match, or there are multiple SMUs with the same
address. reate a unique address for each SMU on the
network and insure they match-up with a HMI2channel #.
3. (RS-485) The network termination switches are improper-
ly set. Verify that only the devices on the physical ends of
the network have the network termination switches “ON”,
and all others are “OFF”.
4. (Pulse/Analog) The “sound” signal is improperly applied to
the sound terminal block. Verify connection.
5. (Analog) The automatic timer is not activated. Verify that
the parameter AutoTime is “ON” if automatic measurement
cycles are desired.
ROBLEM: The SMU reports and “Error” after a measure-
ment cycle is completed
CAUSE/SOLUTION:
1. (Return Error) The plumb bob did not travel as far when
ascending as it did when descending. Determine if plumb
bob is trapped in material. Request another measurement.
A subsequent “motion” error confirms a entrapment. A
subsequent “index” error indicates that plumb bob has
freed itself. Request another measurement and errors will
likely cease.
2. (Index Error) The plumb bob did not travel as far when
descending as it did when ascending. Determine if mount-
ing is causing the plumb bob to return to an inconsistent
location at the start/socket position.
3. (Motion Error) The plumb bob did not travel a far
enough distance when measurement was requested.
onsider the following possibilities:
- Plumb bob is trapped in material
- Plumb bob is stuck to mounting surface
- able is broken
- able is restricted in wiper seal
- able is damaged
ROBLEM: The SMU measurement is not accurate
CAUSE/SOLUTION:
1. able length is too short for application. Replace cable
with suitable length.
2. Wiper seals are creating excessive drag resulting in pre
mature reversing of plumb bob. lean or replace
wiper seals.
3. able is slipping on measuring wheel due to the lubricity of
the material being measured. onsult factory.
4. able is damaged (kinked, frayed) somewhere through its
length resulting in premature reversing of plumb bob.
Replace cable.
5. (Pulse) ount resolution switch is improperly selected.
Insure appropriate resolution is selected.
6. (Analog) ycle Limit function ycLimit is causing plumb
bob to reverse before reaching material surface.
Reprogram ycLimit value to suit application.
RO UBL ES HO O IN G ME CHA NI CA LS

13
M E C H A N I C A L S
S.H.C.S.
(8) 5/16
(6) .34 [8.6]
HOLES ON A
7.00 [177.8] B.C.
7.94
201.6
XX" [XXmm]
UNITS UNLESS SPECIFIED
A
(1) 1/4" NPT
AIR PURGE
(2) 3/4" NPT
CONDUIT
ENTRIES &
(2) 1/4
B.H.C.S.
260.3
10.25
611.1
24.06
8.00
203.2
DIMENSIONS ARE SHOWN IN INCHES WITH MILLIMETER EQ IVALENT IN BRACKETS
Silo Monitoring nit (SM )
Digestible Plumb Bob
(6-2190)
Standard K-Flange
(6-3105)
5˚ K-Flange
(6-3125)
10˚ K-Flange
(6-3128)
Standard Aluminum
Plumb Bob (6-3103)
Standard Aluminum
Teflon-Coated
Plumb Bob
(6-3123)
Standard
Stainless Steel
Plumb Bob
(6-3136)
Inverted Cone Plumb Bob
(6-4106)
Inverted Cone Teflon-Coated
Plumb Bob (6-4126)
Ball Float Plumb Bob (6-4108)
Ball Float Teflon-Coated
Plumb Bob (6-4128)
Solid / Water
Interface Style
Stainless Steel
Plumb Bob
(6-4112)
6

B U L L E T I N
344A
Monitor echnologies LLC
44W320 Keslinger Rd.
t
Elburn, IL 60119
t
630-365-9403
t
800-766-6486
t
Fax: [phone]
t
www.monitortech.com
Power Reqs: 115 VA (+15%) or 230 VA (+15%), 50/60 Hz
Power onsumption: 6 VA continuous, 50 VA intermittent
Altitude: 6562 ft (2000m) max
Relative Humidity: Suitable for Outdoors
Installation ategory: I I
Pollution Degree: 4, Suitable for indoor/outdoor use
Operating Temp: -40° F to 150° F (-40° to 65° )
Max. Int Bin Temp: Up to 300°F (149° ) w/use of bare SS cable;
Up to 200°F (93° ) w/use of nylon or
polyethylene jacketed cables
Max. Vessel Pressure: 15 PSI
Measurement Range: 150 feet maximum (45.7 m)
Measurement Rate: 1.0 foot/second (typical) (0.3 m/s)
Accuracy: +0.25% (distance or level)
Repeatability: 0.1 feet (30 mm)
Resolution: 1/100 foot (3 mm)
Mounting: Freeze-Resistant “K” flange, 8” dia. w/ 7” bolt circle
onduit Entry: (2) 3/4” NPT
able: 1/16" nylon-jktd (270 lb/123 kg); 3/64" SS
unjktd (270 lb/123 kg); 1/16" polyethylene-jktd
(270 lb/123 kg)
SMU Weight (Approx.): 42 lbs (19.1 kg)
Plumb Bob Weight: 2 lbs (0.9 kg)
Shipping Weight (Approx.): 45 lbs (20.4 kg) - [Includes SMU, plumb bob,
cable and carton]
Ship arton Dimensions: 34 x 15 x 16 inches (864 X 381 X 406 mm) -
(L X W X H) [Includes SMU, plumb bob & cable]
Enclosure/Housing: ast Aluminum, powder coat finish
Air Purge onnection: 1/4” NPT
Protection: NEMA 4X / Enclosure Type 4X; IP66
Approvals: SAus/c: Ordinary Locations;
lass I I , Group E,F,G; lass I I I
ATEX: I I 1/2 Dc T 75˚
Ex tD A21 IP6X T75˚
(Ta -40˚ to +65˚ )
E Mark
RS-485 Model
Input/Output: RS-485, half-duplex, isolated, proprietary protocol
Address Selection: 1-16 (Switch Selectable)
Wiring Distance: 4000 ft (1219 m)
ulse/Retro Model
ount: 1 pulse per 1/10’ or dm, selectable, isolated,
(0.1 ft) 12 Hz, time on 40mS, time off 45 mS
(0.1 m) 4 Hz, time on 40mS, time off 210 mS
70mA max, 24-250 VA or 24 VD
Relay Output: 5A @ 250VA max, isolated, dry contact
Sound/Lockout: (Vhi)98-265VA /D , 9.5K ohm input resistance,
isolated; (Vlo) 20-55 VA /D , 2.0K ohm input
resistance, isolated
Analog(4-20mA) Model
4-20mA: Reversible to 20-4mA, 500 ohm max loop, isolated
Relay Output: 5A @ 250VA max, isolated, dry contact
Sound/Lockout: (Vhi)98-265VA /D , 9.5K ohm input resistance,
isolated; (Vlo) 20-55 VA /D , 2.0K ohm input
resistance, isolated
SP ECIFI CA I ON S
Monitor Technologies LL warrants each SiloPatrol®SE inventory monitoring sys-
tem it manufactures to be free from defects in material and workmanship under nor-
mal use and service for two (2) years from the date of purchase. The purchaser
must notify Monitor of any defects within the warranty period, return the product
intact, and prepay transportation charges. The obligation of Monitor Technologies
LL under this warranty is limited to repair or replacement at its factory. This war-
ranty does not apply to any product which is repaired or altered outside of Monitor
Technologies’ factory, or which has been subject to misuse, negligence, accident,
incorrect wiring by others, or improper installation. Monitor Technologies LL
reserves the right to change the design and/or specifications without prior notice.
WA RRA N Y
SA FE Y
General Safety
CAUTION: It is essential that all instructions in this manual be followed to
ensure proper operation of the equipment and safety of operating personnel.
The use of this symbol is used throughout this manual to highlight important
safety issues. Please pay particular attention to these items.
Electrical Shock Caution
SMUs are powered with HIGH VOLTAGE. No operator serviceable parts are
inside. All servicing is to be performed by qualified personnel. Each SMU is pro-
vided with a "protective conductor terminal" which shall be terminated to earth
ground potential (See Electrical Installation). This product's design complies with
EN61010-1 installation category II and pollution degree 2.
Hazardous Location Caution
ertain SMUs can be used in Hazardous Locations (See Specifications).
These models shall only be used in applications covered by stated ratings or
those considered non-hazardous. Failure to comply could result in damage
to personnel and property. The following must be maintained to assure safe
operation:
1) Enclosure integrity - the dimensions of the housing, side covers,
cover retention hardware, or through shafts shall not be altered.
2) Maintenance - Power to all circuits must be disconnected before con-
ducting any investigation, setup, or maintenance when in a hazardous
atmosphere.
Mechanical Hazards
onsider the SMUs weight whenever lifting or moving the instrument. When
being serviced by authorized personnel, extreme caution shall be taken
whenever power is supplied to a SMU unit and the cable and associated
mechanisms are accessible. The gearmotor has sufficient torque to pinch
fingers between the cable and other mechanical parts. Particular areas of
danger include the storage reel, measuring wheel, rollers, and take-up
spring assembly.
Electromagnetic Compatibly (EMC)
The SMU was tested and found to comply with the standards listed below.
The SMU should not be used in residential or commercial environments.
ompliance to the EM standards was demonstrated by means of a test
setup using the following installation methods.
1) SMU enclosure was connected to earth ground (protective earth).
2) Shielded cable was used to interconnect the RS-485 network (connec-
tions +D and -D). The shield drain was connected to earth ground (SHD
terminal) at each end.
EMC Emissions:
Meets EN 61326-1 Electrical Equipment for ontrol Use, EM
EN 55011 Radiated and conducted emissions
( lass A - industrial)
EN 61000-3 Fluctuation/Flicker
Meets F Part 15B RF Devices, Unintentional Radiators
ISPR 11 Radiated and conducted emissions
( lass A- industrial)
EMC Immunity:
Meets EN 61326-1 Electrical Equipment for ontrol Use, EM
IE 1000-4-2 Electrostatic discharge (industrial)
IE 1000-4-3 RF radiated EM fields (industrial)
IE 1000-4-4 Electrical fast transients (industrial)
IE 1000-4-5 Electrical surges (industrial)
IE 1000-4-6 RF conducted EM energy (industrial)
IE 1000-4-8 Power frequency magnetic fields (industrial)
IE 1000-4-11 Source voltage deviation
GDR JSC NOV 1 2013 DOC-001-344A 16