G005 CSA Approved Galvanic Isolation Amplifier

Description

The Positek G005 CSA approved galvanic isolation amplifier 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 G005 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 G005 galvanic isolation amplifier 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.

Output options available;
G005-545 0.5 to 9.5V
G005-546 9.5 to 0.5V
G005-425 4 to 20mA
G005-426 20 to 4mA

Versions are also available for potentiometer inputs.

The screw terminal connector plugs are coded to eliminate cross connection.

The G005 has been designed specifically for use with Positek Intrinsically Safe position sensors in hazardous zone 0, 20 Class I, II & III applications and is certified; [Ex ia IIC] [AEx ia IIC]; [AEx ia D IIIC]. Positek® IS 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.

G005 provides a regulated and resistively limited +5V dc power supply required by Positek IS sensors, it can be connected in three or five wire modes. Used in five wire mode positive and negative sense inputs enables the unit to dynamically adjust the sensor supply thus ensuring the correct voltage across the sensor. Connected in this way the amplifier can compensate for 15Ω conductor resistance. The sense terminals are linked internally so the end user can use the amplifier in three wire or five wire mode without the need to fit or remove external links.

The Positek® Amplifier can also be supplied configured for use with potentiometers.

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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	Option Code
0.5 - 9.5V DC	G005-545
9.5 - 0.5 DC	G005-546
4 - 20 mA	G005-425
20 - 4mA	G005-426

For use with Potentiometers

Output Signal	Option Code
0.5 - 9.5V DC	G005-001
9.5 - 0.5 DC	G005-002
4 - 20 mA	G005-003
20 - 4mA	G005-004

Intrinsic Safety

CSA approval

The Galvanic Isolation Amplifier, suitable for all areas, is CSA approved to:
[Ex ia IIC] [AEx ia IIC] [AEx iaD IIIC]

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 at 15mA max
Lead Resistance for 15mA	15Ω max (all connections)

Output Options

Voltage	0.5-9.5V - output resistance 5Ω
Current Loop	4-20mA, load resistance 0-1KΩ

Safety Parameters

Uo	10.66V
Io	50.5mA
Po	121mW
Li	0
Ci	0
Um	253V

Transfer characteristics

Sensor Input Resistance	>5MΩ
Non-Linearity	<+/- 0.1% FS
Temperature Drift	<0.01% FS/°C for voltage outputs
Setting 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 optput (J3)
Electromagnetic Compatibility	EN561236-2-1:2006 (EN31326-1:2006)
Ambient Temperature Range	-20°C to +60°C working -40°C to +100°C storage
Housing	97.3 x 22.5 x 111.9mm
Protection Class	IP20
Mounting	35 x 7.5mm top-hat rail (DIN 46277-3)

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G005 CSA Approved Galvanic Isolation Amplifier

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Description