Define Instruments Sentry Operating Manual

Sentry
Trip Amplier
1
Universal input 22V excitation Optional 0.4" display 2 x relay outputs Optional isolated analog
output (0[4]–20mA or 0–10V, software select)
Smart, simple, USB
powered setup
Designed for harsh EMC
environments
Flexible 32 point
linearization table
General Description
The Sentry Trip Amplier accepts analog inputs from a range of industrial sensors, including: process, tempera­ture, ow, frequency, and voltage from 200mV to 300V. It features a wide range power supply that suits both AC mains and 24V DC applications, and supplies the excita­tion required for common sensors and transmitters.
The Sentry comes standard with two relays, which can be set up for a variety of alarm and control functions. An optional isolated analog output provides both 0(4)– 20mA and 0–10V signals to interface to PLC's and SCADA systems.
The Sentry is a tough and reliable instrument that has been designed for demanding industrial environments. Advanced techniques have been used to meet or exceed CE noise immunity requirements. Optional is a 4 digit display for your convenience during commissioning, and to simplify fault-nding in the event of a system malfunction.
The unit boasts a 1 minute USB setup using the Dene ToolBox conguration soware. All functions are explained expertly in the dynamic sidebar help - perfect for the novice learning about industrial applications, or the expert who wants to save commissioning time.
Quick start
Hardware Install (p6)
Soware Install (p9)
Soware Setup (p11)
Wiring
(p14)
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CONTENTS
Contents ................................................. 2
Order Codes ............................................ 2
Safety Notices ......................................... 3
1 - Specications .................................... 3
2 - Front Display & Cover ...................... 5
2.1 - Front display .............................. 5
2.2 - Transparent cover ..................... 5
3 - Hardware Installation ...................... 6
3.1 - Case diagram ............................ 6
3.2 - Installation environment ........... 6
3.3 - Installation instructions ............ 7
3.4 - EMC installation guidelines ....... 8
4 - Soware Installation ....................... 9
5 - Soware Conguration Using
ToolBox ............................................ 11
5.1 - Connect using Bridge Key ........ 11
5.2 - Using ToolBox ......................... 12
5.3 - ToolBox interface overview .... 13
6 - Wiring ............................................. 14
6.1 - Wiring overview ...................... 14
6.2 - Terminals ................................. 14
6.3 - Power supply ........................... 15
6.4 - Sensor input ............................ 15
6.5 - Relay outputs .......................... 15
6.6 - Analog output ........................ 16
6.7 - User input ................................ 16
7 - Input Wiring & Specications ........ 16
7.1 - Thermocouple input ............... 17
7.2 - RTD input ................................ 17
7.3 - NTC input ................................ 18
7.4 - Current input .......................... 19
7.5 - Voltage input .......................... 20
7.6 - Digital pulse ............................ 21
7.7 - Potentiometer input ............... 22
7.8 - AC current sensor .................... 23
8 - Maintenance & Service .................. 24
8.1 - Calibration ............................... 24
8.2 - Troubleshooting ...................... 24
8.3 - Service ..................................... 25
A - Appendix A - EMC Test Results ...... 25
B - Appendix B - Warranty & User's
Responsibility ................................. 27
ORDER CODES
SEN UV R2(A) ND
Sentry Universal Voltage Output No Display
Sentry SEN Sentry Trip Amplier
Universal Voltage UV 24–250V AC / 19.5–250V DC
Output R2
R2A
No Display
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ND No LED display
2 x relay outputs (default conguration) 2 x relay outputs, 1 x analog output (0[4]–20mA/0–10V)
SAFETY NOTICES
For your safety and the prevention of damage to the Sentry unit and other equip­ment connected to it, please read complete instructions prior to installation and
operation of the Sentry, and carefully observe all safety regulations and instruc­tions. Consult this manual carefully in all cases where hazard symbols are marked on your Sentry unit.
Use of this instrument in a manner not specied by the manufacturer may compro­mise the protection provided by the instrument. This instrument should not be used to directly drive valves, motors, or other actuators, unless equipped with appropri­ate safeguards.
It is the responsibility of the user to identify potential hazards that may arise in the event of a fault to unit, and implement safeguards for the prevention of harm to persons or equipment. The safety of any system incorporating this unit is the responsibility of the assembler of the system.
Symbol denitions
3
CAUTION
Risk of electric shock
Please refer to user manual.
CAUTION
Risk of danger
Please refer to user manual.
1
SPECIFICATIONS
Power
Power supply 24–250V AC / 19.5–250V DC, 47–63Hz, 6VA max
Isolation 2,300Vrms for 1min to all inputs and outputs
Both direct and alternating current.
Equipment protected throughout by DOUBLE INSULATION or REINFORCED INSULATION.
Analog input
Input Universal (see section 7 for full input specications and wiring)
Excitation power
Excitation 22V ±10% (25mA max)
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Relay output
Number of relay outputs 2
Typ e 1 x Form C, 1 x Form A
Isolation to sensor and user input com­mons 2,300Vrms for 1min
Working voltage 240Vrms
Contact rating
Form C relay: 10A @ 120/240V AC or 28V DC (resistive load) Form A relay: 3A @ 120/240V AC or 28V DC (resistive load)
Life expectancy 100K cycles min at full load rating
User input
One user input is available, and can be pro­grammed for manual relay reset, latching or zero functions
Max continuous input 20V DC
Isolation to sensor input common
Not isolated
Analog output
Typ e 1x 0(4)–20mA or 0–10V DC (soware selectable)
Isolation to sensor and user input com­mons 1,400Vrms for 1min
Working voltage 125V
Max output drive 20mA (600Ω max load at 12V DC)
Accuracy/repeatability 0.05% of FSO
Resolution 0(4)–20mA = 1μA
0–10V = 1mV
Temperature dri 30ppm/°C typical
Powered Self-powered (active)
OPTIONAL
Construction
35mm DIN rail mount casing
IP20 rated - Install in a protective enclosure (see 3.3). Installation Category II; Pollution Degree 2; Flame resistant
Dimensions (H x W x D)
101 x 23 x 120mm (3.98 x 0.91 x 4.72")
Weight Approx 177g (6.2oz), including plugs
Plastic ap to protect front display. (Swing
upward to access programming port)
Display
Digits 4 digit red LED, 10mm (0.4") 7-segment characters
Display range -1999 to 9999
Annunciators 2 x setpoint indicator LEDs
OPTIONAL
Environmental conditions
Operating humidity 5–85%RH max (non-condensing)
Operating temp -10 to 50°C (14 to 122°F)
Storage temp -20 to 60°C (-4 to 140°F)
Altitude Up to 2,000m (approx 1.2mi)
Certications & compliances
EN 61326-1 Immunity to Industrial Locations
Emission CISPR 11 Class A (EN 61326)
Safety requirements for electrical equip­ment for measurement control, and labora­tory use:
EN 61010-1 General Requirements EN 61010-2-030 Particular Requirements
for Testing and Measuring Circuits
IP20 Enclosure rating
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2
FRONT DISPLAY & COVER
2.1 - Front display
2.1A 4-Digit LED Display
2.1B Setpoint Indicator LED's
2.1C PC Setup Port
See 5.1 for connection instructions
2.2A Status LED
Slow blink indicates normal opera­tion, faster ashes indicates error. See 8.2 for troubleshooting
2.2 - Transparent cover
The transparent plastic cover over the front panel provides protection (mainly from dust accumulation over time) to the Sentry's dis­play and programming port.
The transparent cover must be opened to access the PC Setup Port (see 2.1C) for con­guration of the Sentry using Dene ToolBox (see sections 4–5).
To open the cover, slide your ngernail into the crack between the plastic cover and the unit case in the bottom right or bottom le corner, and then ick the cover upwards.
Note that levering from the right or le side, rather than the centre, is the easiest way to disengage the cover's clip.
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120mm (4.72")
(3.98
")
3
HARDWARE INSTALLATION
3.1 - Case diagram
101
mm
")
23mm
(.91")
Terminals with Connectors in
112 mm
(4.41")
Terminals with Connectors in
35mm DIN Rail
101 mm
(3.98
23 mm
(.91")
3.2 - Installation environment
The Sentry should be installed in a location that do not exceed the maximum operating temperature, and at a safe distance from other devices that generate excessive heat. The installation environment should provide good air circulation to the unit.
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The plastic casing and product label may be cleaned, if required, using a so, damp cloth and neutral soap product.
Caution should be exercised when cleaning the unit to avoid water to dripping inside, as this will damage the internal circuits.
3.3 - Installation instructions
A - Mount in an Enclosure (Fig 1)
The Sentry is rated IP20, and should be mounted in an enclosure (not supplied) to protect it from weather conditions and dust.
Prepare the enclosure as illustrated by mounting a 35mm DIN rail, and cable glands or other required components.
B - Mount on DIN Rail (Fig 2)
To clip the unit onto the DIN rail:
(1) Hook the upper part of the unit onto
the rail, and then
(2) Press down towards the rail until the
red hook clicks into place
Leave at least 2cm (.79") clear on either side of the unit, and at least 5cm (1.97") clear above and below the unit, to allow room for airow and wiring.
7
Fig 1
Fig 2
C - Wiring
Refer to sections 6 & 7 in this manual.
D - Removal from DIN Rail (Fig 3)
The unit may be unclipped from the DIN rail if required by inserting a small screwdriver into the slot on the red hook (just visible when the unit is mounted), and levering the red hook down.
This will release the hook, allowing the unit to be detached from the DIN rail.
Fig 3
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3.4 - EMC installation guidelines
The Sentry has been designed to cope with large EMC disturbances. This has been
achieved by continual testing and improve­ment of ltering and layout techniques over many years.
The Sentry not only meets CE noise require­ments, but surpasses them in many tests. (For full details and test results, please see Appendix A.)
However in some applications with less than optimum installations and large power switching, the EMC performance of the Sentry can be further improved, by:
A Reducing noise from large power
switching devices, like contactors, using one or several of the following methods:
Install the Sentry in an earthed metal enclosure.
If the Sentry is mounted close to large power switching devices like contac­tors, then every switching cycle there is a possibility of generating a large amount of near eld radiated noise. The metal enclosure acting as a fara­day cage will shunt this radiation to ground and away from the Sentry.
Increase the physical distance of the Sentry from power devices.
Further improvements can be made with this type of noise by increasing the physical distance from the power devices. For example, increasing the control box distance from 6” to 12” from the noise source will reduce the noise seen by the control box by a factor of 4.
Add RC snubbers to the contactors or power switches.
This oers an inexpensive and eec­tive solution.
B Using shielded cable on sensitive input
and control signal lines.
Good results can be obtained by ground­ing the shields to the metal enclosure close to the entry point. All cables act as aerials and pick up unwanted R.F. radiated signals and noise; the earthed shield acts as a faraday cage around the cables, shunting the unwanted energy to ground.
Shields can also help with capacitively coupled noise, typically found in cir­cumstances when signal cable is laid on top of noisy switching power cables. Of course, in this case, you are better o to keep separate signal and power lines.
C Laying cable on earthed cable trays.
This can also help reduce noise seen by the Sentry, and is particularly useful if there are long cable runs, or the unit is close to radiating sources such as two way radios.
D Adding snubbers for AC signals or a
yback diode for DC coils.
The relay outputs of the Sentry have built in MOVs to help reduce EMI when switching inductive loads, however adding snubbers (for AC signals) or a yback diode (for DC coils) can further reduce EMI at the load.
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4
ToolBox oers a smart, no-fuss setup experience for your Sentry Trip Amplier. It features USB powered programming (no power supply required!) and has been designed to simplify and speed up conguration.
You must install ToolBox before connecting the Sentry to your computer. If you have already connected the Sentry using the Bridge Key, please disconnect it before continuing.
A Download the latest version of ToolBox from
www.deneinstruments.com/toolbox
For ease of access, we recommend saving the install le on your desktop. If you can't nd the install le, check whether your browser has saved it in your 'Downloads' folder.
B Extract the install le from the zip folder (Fig 1). Right-click on the zip folder and choose
'Extract All', (or extract the le using another extraction utility of your choice).
SOFTWARE INSTALLATION
Fig 1
A Double-click on the extracted .msi install
le. This will launch the ToolBox installer.
Depending on your security settings, a 'Security Warning' dialogue may appear (Fig 2).
If you see the security message, click 'Run'.
Fig 2
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