Define Instruments Sentry Operating Manual

Sentry

Trip Amplier

› 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)

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

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

CAUTION

Risk of electric shock

Please refer to user manual.

CAUTION

Risk of danger

Please refer to user manual.

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)

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

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.

120mm (4.72")

(3.98

HARDWARE INSTALLATION

3.1 - Case diagram

101

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.

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.

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

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.

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

+ 19 hidden pages

Define Instruments Sentry Operating Manual

Specifications and Main Features

Frequently Asked Questions

User Manual