A005 IECEx Approved Galvanic Isolation Amplifier


The A005 Galvanic Isolation Amplifier is approved for use with Positek IECEx approved A series Intrinsically Safe Position Sensors.  The sensors are ratiometric i.e. the output signal scales with the supply voltage, to ensure the safe area signal accurately corresponds with sensor displacement it is important that the sensor supply is correct.

The A005 Galvanic Isolation Amplifier provides a regulated and resistively limited +5V dc power supply required by the sensors, it can be connected in three or five wire modes. Used in five wire mode positive and negative sense inputs enable the A005 to dynamically adjust the sensor supply thus ensuring the correct voltage across the sensor. Connected in this way the A005 can compensate for 15Ω conductor resistance.  The sense terminals are linked internally so the end user can use the A005 in three wire or five wire mode without the need to fit or remove external links.
The A005 has an input power supply range of 12 to 30 volts dc, making it suitable for a wide range of hazardous area applications. It is tri-port isolated providing isolation between the amplifier power supply, the hazardous area and the A005 output signal. The sensor supply and output are transformer coupled providing 2.5kV isolation between the safe and hazardous area circuits eliminating the requirement for a high-integrity earth.
The output of the A005 is factory configured to either 0.5 to 9.5V or 4-20mA and has a bandwidth of 4.7kHz, making it ideal for servo control loops.

The A005 can also be supplied configured for use with potentiometers.



Specification

Intrinsic Safety

 

Approval

IECEx ITA 12.0005

 

Specification

 

Power Supply

 

Voltage

24V dc Nom. 12V - 30V

Current Consumption
(24V Supply)

approximately 50mA (Voltage O/P)
approximately 70mA (Current O/P)

Sensor Supply

5V @ 15mA max.

Lead resistance for 15mA

15Ω maximum (all connections)

Output Options

 

Voltage

0.5-9.5 V, Output resistance 5Ω
Current Loop 4-20mA, Load resistance 0-1Ω
Safety Parameters  

Uo

10.66V

Io

50.5mA

Po

135mW 

Li

0

Ci

0
Um 253 V

Transfer Characteristics

 

Sensor input resistance

>5MΩ

Non-linearity

<+/- 0.1% FS

Temperature drift

<0.01% FS/°C for volatge outputs 

Settling time to 1% of span

<300μs for 10-90% step change

Rise time

<200μs for 10-90% step change

Bandwidth

dc to 4.7kHz (-3dB)

Isolation

2500V between safe area terminals and hazardous area terminals, 50V between power rail (J4) and output (J3)

 

 

Electromagnetic compatability

EN561236-2-1:2006 (EN31326-1:2006)

Explosive atmosphere

EN60079-0:2006 EN60079-11:2007

Ambient templerature range

-20°C to +60°C working
-40°C to +100°C storage

Housing

97.3x22.5x111.9mm

Protection class

IP20

Mounting

35x7.5mm top-hat rail (DIN 46277-3)
   

Outline

Click for pdf
Request AutoCAD Drawing
Datasheet Click for pdf
Installation Sheet Click for pdf


Preferences

Positek offers a range of options for its standard sensors.
Each sensor is manufactured to suit each customer's preferences.
If your requirement is outside the options given below,
Positek can modify/ redesign a sensor to suit your specific requirement.
Standard options are available as below:

For use with Positek Intrinsically Safe Sensors

Output Signal
Order code
0.5-9.5V dc
A005-545
9.5-0.5V dc
A005-546
4-20 mA A005-425
20-4mA A005-426


For use with Potentiometers

Output Signal
Order code
0.5-9.5V dc
A005-001
9.5-0.5V dc
A005-002
4-20 mA A005-003
20-4mA A005-004


 


 

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  Positek Limited

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