Security & Electronic Technologies GmbH
Operating Instructions
SECU-BAR 125
Barrier for intrinsically safe power supply
Security & Electronic Technologies GmbH
Security & Electronic Technologies GmbH
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TOC – Table of Contents
Safety Instructions ................................................................. 3
Product description ............................................................... 3
Checking the contents of delivery ........................................ 4
Commissioning ...................................................................... 5
Setup .................................................................................... 5
Connection terminals of SECU-BAR 125 ............................. 5
Training ................................................................................... 6
Maintenance ........................................................................... 6
Warranty ................................................................................. 6
Dismantling, disposal ............................................................ 6
Troubleshooting ..................................................................... 6
Technical specification .......................................................... 7
Article number: LI029
Version: Rev. 1.1
Date: 2007-08
Important: The technical specification stated in this document is subject to modification by the manufacturer without any notice.
©SECURITY & ELECTRONIC TECHNOLOGIES GmbH.
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Safety Instructions
During installation and operation of this measurement system in explosive
environments adhere strictly to the operating instructions of the manufacturer, take into account all local applicable safety instructions, standards
and technical recommendations.
Take primary ignition prevention measures (e.g. sufficient air circulation,
avoid electrostatic charging and discharging, …).
Take into account the technical recommendations for connecting together
intrinsically safe circuits as per EN 60079-14.
SECU-BAR 125 shall be used for applications only described in this document. For improper use or applications it is not designated for and also for
the resulting damages the manufacturer cannot overtake any responsibility.
Modifications on the product, esp. modifications which might have an impact on the level of ignition prevention are prohibited.
SECU-BAR 125 instruments shall be installed and operated by persons only who are authorised and trained by the plant operator/manager and if they
have studied and understood these operating instructions. The operator of
the plant is responsible for instructing the users.
Product description
Barriers limit the energy which is fed into intrinsically safe lines in a way that
ignition of explosive gas mixtures are impossible. Neither sparks nor excessive surface temperatures can cause explosions. The barrier is installed
outside the hazardous area. The output provides an intrinsically safe power
line for electrical equipment in the Ex-zone. The maximum input voltage UM
must not be exceeded to ensure the ignition prevention level.
SECU-BAR 125 is an active barrier for supplying intrinsically safe appliances in Ex-zones, like SECU-DATA instruments. The unsafe DC-power supply in the range 18 … 36 V is connected to the input IN of the SECU-BAR
125. The output current is electronically limited to max. 130 mA (rated value:
125 mA) and the output voltage is limited to max. 25.2 V to achieve the intrinsic safety as per EN 50020. SECU-BAR 125 is protected against reverse
polarity and provides an output voltage with ignition prevention level
“ia“ and an output current with ignition prevention level “ib“. SECU-BAR 125
provides extra high current output current and stable output voltage independent from the load current in comparison to classic, passive diode barriers which opens universal fields of applications.
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Features
ATEX certified
Rated output voltage: 24 V electronically stabilised/limited
Rated output current In = 125 mA, electronically limited
Wide input voltage range: 18 – 36 V
Easy installation in distribution board on DIN-rails
Applications
SECU-BAR 125 is installed outside of the Ex-zone and provides an intrinsi-
cally safe output voltage with ignition prevention level “ia” and an output
current with ignition prevention level “ib” for electrical equipment installed in hazardous, flammable environments like
Industrial sensors for:
Pressure, temperature, humidity, proximity, length, weight
Limit switch position, transducers for non-electrical parameters ...
Electrical equipment in the chemical, petro-chemical industry, tank
:
farms
Level indication, overfill prevention, pressure, temperature
Fuelling stations:
Level control systems, overfill prevention systems
Principle of operation
The input voltage is passed via a fuse to a DC-DC-voltage converter which
stabilises the output voltage. Via two electronic current limiting devices in
series the voltage is fed to the output of the barrier. Additional protective
devices provide a power supply for probes in Ex-zone 0. The output voltage
is limited under all circumstances to maximal 25.2 V and the output current
to 131 mA max.
Checking the contents of delivery
Please, check the contents of delivery immediately after receipt and unpacking. In case of missing components or transport damages contact your
local dealer or a SECU-TECH representative.
Please keep the original packing material if you have to send the instrument
to a service facility. For damages resulting from improper packing the manufacturer cannot overtake any liability.
Keep these operating instructions in case you hand over the instruments to
other persons or if operating personnel has to be trained.
SECU-BAR 125 Order. No.: HF059
Scope of delivery
SECU-BAR 125
Operating instructions
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IN
OUT
U = 18 V ... 36 V DC
in
U = 24 V
I = 125 mA
out
out
....01110100111....
U = 24 V
I = 125 mA
out
out
U = 18 V
... 36 V DC
in
I = 0 ... 6 mA
U = 11 V
... 40 V DC
in
Sonde
Zone 0
NAMUR
Sonde
Re1: NAMUR Ein/Aus
Re2: Sondenfehler
Typical application:
Commissioning
Setup
Important:
Only qualified personnel with appropriate training and authorisation by the
installation manager is entitled to connect SECU-BAR 125 to an existing
installation. Adhere to all applicable, local safety regulations.
Connection terminals of SECU-BAR 125
Hints:
SECU-BAR 125 features an isolating housing suitable for DIN-rail mounting.
This isolation ensures highest protection level: short circuits via the housing,
indirect touching of live conductors is impossible.
Adhere to local regulations re electrical installation like (DIN VDE 0100,
VBG4, etc.) and instructions of the manufacturer and plant operators.
The wiring is done with terminals with plus-minus screws.
First of all connect the electrical equipment in the Ex-zone to the SECUBAR 125 and afterwards the power supply. Snap the SECU-BAR 125 to the
DIN-rail and power on the system. The green LED on the SECU-BAR 125
indicates the operation of the power supply. Verify the whole system for
plausibility.
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SECU-BAR 125 must not be disposed
of via the municipal waste system.
The manufacturer takes back worn out
units for a small fee and will dispose
the instruments via the legal waste collection system. The appropriate symbol is attached visibly and permanently
on the instrument.
Training
A training as per EU-directive 94/9/EC is not required.
Maintenance
SECU-BAR 125 is maintenance-free, no user serviceable components are
within the housing.
Warranty
For the actual services and conditions see www.secu-tech.at, see the
GTCS – General Terms and Conditions of Sale.
Dismantling, disposal
Troubleshooting
Problem: No power supply of the attached equipment.
Solution:
Check the wiring and the input voltage of SECU-BAR 125. If the green LED
is still not lit, the internal fuse could be blown. SECU-BAR 125 is mouldered
internally and therefore cannot be repaired.
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Technical specification
ATEX certificate: TÜV-A 06ATEX0009X
Classification: II (2) G [Ex i(a)b IIC T4
II (2) D [Ex i(a)bD (20)21 T135°C
Connections:
Inputs:
Outputs:
Important: SECU-DATA does not have a potential separation, the
earth/ground connectors of input and output are connected together
internally. Both earth connectors have to be connected always.
Display:
Fuses:
Housing:
For DIN-rails as per EN 50022 and DIN 46277
Dimensions: 25 x 70 x 103 mm
Material, technology: ABS (Teluran), grey, injection mouldering
Protection: IP 20
Construction: mouldered with PU 403, PTB-registered
Rated values
Input voltage: UM = 36 V DC, UN =18 - 36 V DC
Output (intrinsically safe): UO = 25.2 V DC, IO = 131.3 mA,
CO = 107 nF, LO = 2 mH
Ambient temperature: -30° ≤ Ta ≤ +75°C
Output characteristics:
Earth, ground, Uin =+18 …+36 V
integrated, not replaceable
Terminals with plus-minus screws:
Earth, ground, U
1 green LED for ON-condition
out
Applied norms:
ATEX (EC-directive 94/9/EC), EN 60079-0:2004, EN 60079-11:2007,
EN 61241-0:2006, EN 61241-11:2006, EN 60529.
Security & Electronic Technologies GmbH Page 8
Telefon: +43 2256 20177-0
Fax: +43 2256 20177-11
E-Mail: office@secu-tech.at
Homepage: www.secu-tech.at
Aumühlweg 3/1
A-2544 Leobersdorf
Austria
Security & Electronic Technologies GmbH
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