Bin Master SmartBob AO Manuale utente
SmartBob AO
OPERATING INSTRUCTIONS
PLEASE READ CAREFULLY
BinMaster: Division of Garner Industries
7201 N. 98th St., Lincoln, NE 68507
402-434-9102 • email: info@binmaster.com
www.binmaster.com
925-0406 0613
925-0406 0613
SmartBob AO
TABLE OF CONTENTS
Safety Summary ..................................................................................................................... 3
Introduction ............................................................................................................................. 4
Specications.......................................................................................................................... 5
Location and Mounting ........................................................................................................... 6
Connections and Wiring ......................................................................................................... 6
Power............................................................................................................................. 6
Start Input ...................................................................................................................... 7
Override Input................................................................................................................ 7
4-20 mA Output ............................................................................................................. 8
Relay 1 and 2 Outputs................................................................................................... 9
Wiring Diagram............................................................................................................ 10
Air Purge System.................................................................................................................. 11
User Interface ....................................................................................................................... 11
Run/Display Mode....................................................................................................... 12
Setup Menu ................................................................................................................. 12
Calibrating the 4-20 mA Output............................................................................................ 14
Motor Driven Operations ...................................................................................................... 14
Cable Replacement Instructions .......................................................................................... 15
Probe Options....................................................................................................................... 17
Limiting Stainless Steel Cable.............................................................................................. 19
Mounting Options ................................................................................................................. 20
5-1/8" Floor Flange Template ............................................................................................... 21
7" Floor Flange Template ..................................................................................................... 22
SureDrop Cable Release ..................................................................................................... 23
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SmartBob AO
Safety Summary
Review the following safety precautions to avoid injury and prevent damage to the equipment.
The product should be installed, commissioned, and maintained by qualied and authorized
personnel only.
Install according to installation instructions and comply with all National and Local codes.
Use electrical wire that is sized and rated for the maximum voltage and current of
the application.
Properly ground the enclosure to an adequate earth ground.
Observe all terminal and relay contact ratings as called out on the nameplate and in
the installation manual.
Ensure that the enclosure cover is in place and secured tightly during normal operation.
If this product is used in a manner not specied by the manufacturer the safety protection
could be compromised.
Safety Terms and Symbols
WARNING:
Warning statements identify conditions or practices that could result
in injury or loss of life. Risk of electrical shock.
CAUTION: Caution statements identify conditions or practices that could result
in damage to this product or other property.
Safety Precaution
Whenever personnel are going to enter a vessel that has a SmartBob mounted on it,
the power to the SmartBob should be turned o. The SmartBob lowers a 2 pound weight
(probe) of either metal or plastic material at a rate of up to 2 feet per second when it is taking a
measurement. The weighted probe impacting personnel while it is descending could result in
injury. Turning o the power to the SmartBob will disable the probe from dropping.
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SmartBob AO
The SmartBob AO is a remote sensor for on-demand level measurements. It measures the vertical
distance between the sensor and the surface of product in a tank or silo. During a measurement,
the SmartBob AO lowers a weighted probe and measures the distance by counting pulses from an
internal encoder. When the SmartBob AO detects a lack of encoder pulses (detection of product),
it reverses direction and retracts the probe. The drop and retract encoder counts are compared to
determine the distance to product. The distance to product measurement is then used to update a
display and a 4-20 mA current transmitter. The display simply shows the measured drop distance
while the 4-20 mA output provides a scale of the measurement based upon user-entered calibration
points. There are also two user-congurable relays for level alarms, error and/or measurement indi-
cation. Measurements can be initiated by either the on-board interval timer or a dry contact closure
on the Start terminals. Another dry contact input (Override terminals) can be used for inhibiting a
measurement during the tank’s ll cycle.
INTRODUCTION
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SmartBob AO
SPECIFICATIONS
Power Requirements
115 VAC Model 110 to 120 VAC at 60 Hz
230 VAC Model 225 to 235 VAC at 50/60 Hz
Power Consumption 12 VA continuous, 140 VA intermittent
Operating Temperature -4 to 158°F (-20 to 70°C)
Displayed Accuracy 0.25% plus +/-0.01 ft/m
Displayed Resolution 0.01 ft/m
4-20 mA Current Output
Mode 1 (recommended) Isolated (3,750 Vrms surge), external power required
Mode 2 Non-isolated, SmartBob AO powers the loop
Max Loop Resistance (Mode 1) Depends on external power
Max Loop Resistance (Mode 2) 500 ohms
Accuracy 0.35%
Resolution 16 bits maximum
Relay Outputs 220 VDC/0.24A, 250 VAC/0.25A, 30 VDC/2A
Start Input Dry contact only, 50 ms minimum closure time to trigger
Override Input Dry contact only, normally closed
Enclosure Type 4X, 5, 12
Mounting 3” NPT oor ange
Conduit Entry 3/4” NPT
Weight 25 lb.
Height 14-3/4”
Width 15-3/4”
Depth 7-1/2”
Air Purge Entry 1/4” NPT
Cable 316 stainless steel, 0.063” diameter, nylon coated
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SmartBob AO
Location and Mounting
The SmartBob AO should be mounted on the top of the storage vessel using a 3-inch NPT
coupling and always in a vertical position. If a 3-inch NPT oor ange is used, it must be on a
at level surface to provide a vertical mount for the unit. For measuring dry solids which involve
an angle of repose, it is recommended that the unit be mounted 1/6th of the vessel diameter in
from the side, see gure below. Two mounting ange templates, for a standard 3-inch NPT oor
ange, are provided towards the end of the manual.
Connections and Wiring
All eld wiring should be installed according to local and/or national codes and have a tem-
perature rating of at least 85
°
C. All wiring and jumper conguration should be made with AC
power removed.
Power
A disconnecting means should be provided to safely remove AC power from the SmartBob
AO. Refer to the gure on the following page for connection of the power wiring. The AC
power connects to the 2-pole terminal block located on the motor mount bracket. The left
terminal should receive the line conductor and the right terminal should receive the neutral
conductor.
A good electrical ground must be connected to the ground screw just to the left of the AC
terminal block. This is required for safety, to bleed o any static buildup and to provide surge
protection on the Override and Start inputs. It is recommended that the power cable be run in
metal conduit.
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SmartBob AO
Start Input
This input is used to initiate a measurement and should only be connected to a normally
open set of dry contacts, such as a relay or a push button switch. Momentarily closing
the contacts connected to these terminals will be detected as a start signal and initiate a
measurement. An unshielded two-conductor cable between 14 and 20 AWG will work
for a connection to this input.
Override Input
This input is used to prohibit measurements from occurring and should only be connected
to a normally closed set of dry contacts. Whenever the contacts connected to this input are
open, all measurement requests will be ignored, whether it’s the by the start input or the
on-board interval timer. If this feature is not needed, then the two terminals labeled OVER-
RIDE should be shorted together. These two terminals are shorted together at the factory.
An unshielded two-conductor cable between 14 and 20 AWG will work for a connection to
this input.
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SmartBob AO
4-20 mA Output
This output will provide a 4-20 mA output scale based on the user-set calibration points and the last
measurement. It will also provide a 22 mA signal following an error condition or when no measure-
ment has been taken. There are two modes available, which require the user to properly set jumpers
on the printed circuit board and to properly wire to the correct terminals. A 3-pole terminal block is
provided for this output; however, only two of the terminals are used at any one time depending
on the mode of use. An unshielded two-conductor cable between 14 and 20 AWG will work for a
connection to this input.
Mode 1 provides for electrical isolation up to 3,750 Vrms. In this mode, the SmartBob electronics are
isolated from the on-board 4-20 mA transmitter, the eld wiring and the receiver (PLC). This mode
does require that the DC loop power be provided externally or by the receiver (PLC).
To use Mode 1, rst power down the SmartBob and locate the 4-20 OUT terminal. Next, connect
the positive wire of the 4-20 loop wiring to the top terminal and the negative wire to the middle termi-
nal. Do NOT connect anything to the bottom terminal. If the cable being used has a shield, do NOT
connect it to anything at the SmartBob. Finally, locate jumpers J10 and J11 and move the shunts
on both to pins 2 and 3 (upper position). See diagram below.
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SmartBob AO
Mode 2 does not provide electrical isolation, but does provide the DC power for the loop. Be sure not
to provide external power when using this mode.
To use Mode 2, rst power down the SmartBob and locate the 4-20 OUT terminal block. Next, con-
nect the positive wire of the 4-20 loop wiring to the middle terminal and the negative wire to the bottom
terminal. Do NOT connect anything to the top terminal. If the cable being used has a shield, do NOT
connect it to anything at the SmartBob. Finally, locate jumpers J10 and J11 and move the shunts on
both to pins 1 and 2 (lower position). See diagram below.
Relay 1 and 2
There are two user-congurable, normally-open, relay outputs available for signaling a high-level alarm,
a low-level alarm, an error alarm or a measurement indication. When set for a level alarm, the relay
contacts will be closed when a measurement has exceeded a user-specied level. Once a measure-
ment is taken with results that no longer exceed the user-specied level, the relay contacts will open.
When set for an error alarm, the relay contacts will be closed when a measurement has resulted in an
error. When a measurement successfully occurs without error, the relay contacts will open. When set
for a measurement indication, the relay contacts will be closed during the measurement and then open
when completed. With each relay output there is an LED on the circuit board that will turn on when the
associated relay’s contacts are closed.
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SmartBob AO
There is a 2-pin terminal block available for connection to each relay output. These relays can switch
low current signals and are not meant to power motors or high-wattage light bulbs. Be sure to read
the voltage and current limitations in the Specication sections. An unshielded two-conductor cable
between 14 and 20 AWG will work for a connection to this input.
Wiring Diagram
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