ARJAY ENGINEERING 2852-PCD User manual

MODEL 2852-PCD
Plugged Chute Detector
User Manual
Technical Support
Continental North America Toll Free 1-[phone]
Ph: [phone] Fx: [phone]
A Product of Arjay Engineering Ltd.
Oakville, Ontario, Canada
www.ArjayEng.com
MODEL:
HARDWARE NO.: 5.1
SOFTWARE NO.:
SERIAL NO.:

Model: 2852-PCD User Manual Rev: 2.1
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TABLE OF CONTENTS

1.0INSTRUMENT OVERVIEW ............................................................................................3
1.1Features .............................................................................................................3
1.2Model Number vs. Voltage Input........................................................................3
1.3Specifications .....................................................................................................4
2.0INSTALLATION...............................................................................................................6
2.1Controller Installation .........................................................................................6
2.1.1Permanent Power Connection (AC Powered Models only) ................6
2.2Sensor Installation..............................................................................................7
2.3Electrical Installation ..........................................................................................8
2.3.1Input / Output Terminal Specification ..................................................9
2.4Glossary of Symbols ..........................................................................................10
3.0STARTUP AND CALIBRATION......................................................................................11
3.1Startup................................................................................................................11
3.2Menu Flow Chart Background Information ........................................................11
3.2.1Menu Description.................................................................................11
3.2.2Menu Flow Chart .................................................................................11
3.2.3Data Entry............................................................................................12
3.32852 Controller Calibration ................................................................................12
3.3.1Site Calibration ....................................................................................12
4.0SETUP and ALARMS .....................................................................................................13
4.12852 Controller Setup ........................................................................................13
4.22852 Controller Alarms ......................................................................................13
4.32852 Controller Network ....................................................................................14
4.3.1Modbus Configuration .........................................................................14
4.3.22800 Series Modbus Register Mapping ..............................................15
5.0MAINTENANCE ..............................................................................................................16
6.0TROUBLESHOOTING....................................................................................................17
7.0FLOW CHARTS ..............................................................................................................18
TABLE OF FIGURES
Figure 1 – Electrical Installation Overview ....................................................................................8

Model: 2852-PCD User Manual Rev: 2.1
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1.0 INSTRUMENT OVERVIEW
The Arjay Plugged Chute Detector provides a means of monitoring product within a chute,
conveyor shaft, or vessel for a plugged or high product condition. The sensor is designed to
mount flush within the chute wall so there is no penetration into the moving product. The sensor
uses an RF Capacitance technology that does not require moving parts.
The complete 2852-PCD system consists of the flush mount sensor, the PMC card mounted at the
sensor, and the 2852 controller.
Chute sensor locations can be awkward and are usually accompanied by high vibration equipment.
The PMC card allows the 2852 controller to be mounted away from the sensor location for safety
and ease of maintenance and set-up. The PMC card at the sensor translates the capacitance
signal from the sensor into a frequency pulse, which can then be transmitted up to one kilometer to
the 2852 controller via 2-wire shielded cable.
The standard sensor facing is constructed of UHMPE (ultra-high molecular weight polyethylene) for
high errosion resistance and has a 304 stainless steel backing. Optional facing materials include
Teflon, Nylon and PVDF.
The model is intended for use in General Purpose non-hazardous areas. For hazardous location
use refer to Arjay Engineering Ltd. For appropriate model.
1.1 Features
Microprocessor based capacitance Controller
Relay and 4/20mA alarm output
Modbus protocol via RS-485 for access by Arjay handheld, Central Access Panel or
compatible system
Local Auto calibration or remote calibration via network
User specified custom features may be added by contacting Arjay Engineering Ltd.
1.2 Model Number vs. Voltage Input
2852-PCD-1 100-240 VAC power input
2852-PCD-3 12 VDC power input
2852-PCD-4 24 VDC power input

Model: 2852-PCD User Manual Rev: 2.1
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1.3 Specifications
Power Input: 12 VDC +15% /-10% or 24 VDC +15% /-10%, 250mA maximum
100VAC – 240VAC +/- 10%, 50/60 Hz, 150mA maximum
Note: DC input models must be supplied by Limited Energy power source.
Limited Energy means compliance with one of the following requirements:
- Class 2 circuit according to Canadian Electrical Code, Part, I, C22.1;
- Class 2 circuit according to National Electrical Code, NFPA-70;
- Limited Power Supply (LPS) according to IEC 60950-1;
- Limited-energy circuit according to IEC 61010-1.
Connections to mains supply Permanent (for AC/DC model)
User Interface:
Display & Keypad Two line LCD with Alarm status display, select menu or enter
values by keypad (display is internal to housing and used for
set-up and diagnostics only)
Communication Interface: Modbus (RS485)
Analog /Relay Outputs:
mA Signal Output 4 mA during Normal and 20 mA during an alarm condition, 900
Ohms max OR 450 Ohms max (12VDC Power)
Relay Output
2 SPDT relay, dry, N.O. Contact 5A @ 250 VAC (Resistive) and
N.C. Contact 3A @ 250VAC (Resistive), selectable failsafe or
non-failsafe, selectable high or low acting alarm, programmable
time delay: 0 – 600 seconds
Instrument Performance:
Measuring Range 0 - 5000 pF (most applications are 100pF to 1000pF)
Accuracy 0.2% of setpoint
Resolution 0.05% of setpoint via network display
0.002% of Full Scale capacitance via network display
Calibration Single point: Auto calibration
Environmental:
Operating conditions Continuous
Operating Temperature -20 °C to +55 °C controller
-60 °C to +55 °C PMC
-60 °C to + 55 °C sensor
Relative humidity 0 to 95% (non-condensing)
Altitude ≤2000 m
Installation Category II
Pollution Degree 2
Equipment mobility Fixed

Model: 2852-PCD User Manual Rev: 2.1
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Mechanical Specification: Refer to Dimensional Drawing
Enclosure Rating Type 4 / IP65 Painted Steel (Blue)
Type 4x / IP66 Polycarbonate (Gray)
Type 4x / IP66 316 Stainless Steel
Options on Enclosure Buzzer
Pilot Light OR Strobe/Beacon
Custom alarms
Approval Standards: UL / IEC 61010-1, 2nd Edition, 2005-07-22 (Electrical
Equipment for Measurement, Control, and Laboratory Use;
Part 1: General Requirements)
UL file number: E343390
CAN/CSA-22.2 No. 61010-1, 2nd Edition, 2004-07,
(Electrical Equipment for Measurement, Control, and
Laboratory Use; Part 1: General Requirements)
CE: UL / IEC 61010-1; IEC / EN 61000-4; ISO 9001:2008

Model: 2852-PCD User Manual Rev: 2.1
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2.0 INSTALLATION
NOTE: If any damage to the instrument is found, please notify an Arjay Engineering
representative as soon as possible prior to installation.
2.1 Controller Installation
Choose the mounting location in accordance with good instrument practice. Extremes of ambient
temperature and vibration should be avoided (see specifications and installation drawing).
The 2850 controller may be mounted up to one kilometer from the PMC card using a minimum 18
gauge, 2-wire SHIELDED cable.
Check the polarity of the + and - wiring between the controller and the PMC prior to powering on
the unit; + to + and - to - to avoid damage. Shield of cable should be connected to secondary
ground terminal marked as . Incoming Earth ground should be connected to primary ground
terminal marked on sub plate.
Important Note: The controller is factory set in a Failsafe mode. This means that the relays
are in an energized state during normal operation. The N.O. relay contact will be held closed and
the N.C. relay contact will be held open during a normal condition. This will allow the relay to return
to its non-energized (shelf) state during an alarm, fault or power failure condition. Wire
accordingly.
Note: Maximum Conduit size for installation size is ¾” FNPT.
2.1.1 Permanent Power Connection (AC Powered Models only)
1) Connection to the building wiring system shall be in accordance with the Canadian
Electrical Code (CEC), Part 1 in Canada, the National Electrical Code, ANSI/NFPA 70 in
the USA, or the local electrical codes of the country where the equipment is being
installed.
2) A disconnecting device is required. The disconnecting means shall disconnect all
current-carrying conductors.
3) 15A circuit breaker or equivalent fuse is required.
4) An external switch or breaker shall be in close proximity to the equipment and within
easy reach of the operator. The switch shall be marked as the disconnecting device for
the equipment and include the symbols to its “ON” and “OFF” positions using the
following symbols:
5) The wiring for AC power should be minimum 18 AWG / 300V or as required by local /
country codes.
6) After field wiring, the primary wires must be secured to the enclosure by tie-wraps to
maintain the separation from the signal wires.
7) Wiring diagram for permanent connection: See drawings at the back of this manual.
8) Use copper conductors only.
Power OnPower Off

Model: 2852-PCD User Manual Rev: 2.1
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2.2 Sensor Installation
The controller is tuned to the capacitance field in front of the sensor during normal process
conditions. A plugged condition will displace the air & product mix in front of the sensor with
solid product. This results in an increase in the capacitance reading in picofards (pF) and will
trigger the alarm relays.
Consider a mounting location where the sensor face will see a maximum product change from a
normal condition to a plugged condition. Avoid locations that may incur build-up of sticky
materials or do not physically change during a plugged condition.
The controller tunes itself to the capacitance reading of a normal process condition. Changes to
product type or conditions such as dry vs. wet material may cause nuisance alarms and require
a re-calibration.
NOTE:
To ensure proper operation and electrical safety, make sure the 2852 enclosure and
the PMC junction box are electrically grounded.
If the equipment is used in a manner not specified by the manufacturer, the
protection provided by the equipment may be impaired.

Model: 2852-PCD User Manual Rev: 2.1
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2.3 Electrical Installation
Figure 1 – Electrical Installation Overview
TB1/TB2 - Relay Output
2 SPDT relay, Dry, N.O. Contact 5A @ 250 VAC (Resistive) and N.C. Contact 3A @
250VAC (Resistive), selectable failsafe or non-failsafe, selectable high or low acting alarm,
programmable time delay: 0 – 600 seconds
TB3 - Power Input
Power input as per Model. Check if ordered AC or DC. . Earth ground is connected to G.
TB4 - Network Output
Connect RS485 + and – to the network D+ and D-.
TB5 - 4/20 mA Output (+ and -)
The 4/20 mA is a sourced output referenced to Ground. It is not loop powered.
4mA = Normal 20mA = Alarm
TB6 - Probe Input
Connect ‘+’ to ‘+’ , ‘-‘ to ‘-‘ between the controller and the PMC card. Check polarity to avoid
damage.
TB7 – Buzzer / Red Pilot Light Output (Optional)
The connection will be factory wired if ordered.

Model: 2852-PCD User Manual Rev: 2.1
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2.3.1 Input / Output Terminal Specification
Input Terminals – Power Source
Terminal
ID Overvoltage category Rated Voltage (V) Rated Current/power
(A/W/VA)
___ HZ or
DC Specified Mains
fluctuation
TB3 II 100-240V 150mA 50/60Hz
 10%
TB3 II 12 OR 24V 250mA DC
 15%
 10%
Input Terminals – Measuring Circuits
Terminal ID Function Measurement
Category Nominal a.c. or d.c line to
neutral voltage
/ if CAT I, Max.
transient
overvoltage Ut
Nominal
a.c. or d.c
current
Rating of
insulation
required for
external
circuit
TB6 Frequency I 15V,50mA / 0 -- DI * or RI**
TB4 RS485
Communicati
on
I 5V, 5mA / 0 -- DI * or RI**
* Double Insulation
**Reinforced Insulation
Output Terminals
Terminal ID Function Isolation or
protection Rated V, A Max. V, A Load type and nominal
TB1 Load Relay N.O. Contact
5A@250VAC &
N.C. Contact
3A@250VAC
-- --
TB2 Load Relay N.O. Contact
5A@250VAC &
N.C. Contact
3A@250VAC
-- --
TB5 Current Isolator(optional) - 18V,20mA,
900

- 9V, 20mA,
450

50mA@18V --
TB7 Voltage None 24VDC, 30mA -- Buzzer / Pilot
Light

Model: 2852-PCD User Manual Rev: 2.1
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2.4 Glossary of Symbols
Attention, consult accompanying documents
Attention, veuillez consulter les documents ci-joints.
Protective Earth
Terre de protection
Fuse
Coupe-circuit; fusible
Direct Current (DC)
Courant continu
Normally open relay contacts
Contacts travail
Normally closed relay contacts
Contacts Repos
Power off
ArróÕ (mise hors tension)
Power on
Marche (mise sous tension)
L
Live
Sous tension
N
Neutral
Neutre
G
Ground
Terre