Explosion-proof Ex USB 4-20mA-Rx

Explosion-proof USB 4-20mA-Rx device lets you read via USB the instant value returned by any industrial sensor following the 4-20mA standard, as well as record the measures on its internal flash for later retrieval when connected again by USB. The device can automatically map the current reading to a physical measure by applying a proportional rule. The module features two inputs, to connect two independent sensors.

You can find sensors for all kinds of physical measures using the standard 4-20mA interface. Transmitting the measure using a 4-20mA current loop makes it possible to get a very accurate reading (up to 0.01%), and works even when the sensor is far away from the interface module (several thousands of meters of cable away).

The Ex USB 4-20mA-Rx supports 2-wire sensors (powered from the current loop) as well as 3-wire sensors (It can even provide up to 80mA to power 3-wire sensors that do not require too much power).

This device can be connected directly to an Ethernet network, to a WiFi network and to a GSM network using special adapters.

Note: To use the Ex USB 4-20mA-Rx device in a hazardous area, the device must be protected to at least IP 65, so it must be placed inside the enclosure.

Ex USB 4-20mA-Rx device don’t require any special drivers or software. Compatible with Windows, Mac OS, Android and Linux and easy to drive from a maximum of programming languages.

The Ex USB 4-20mA-Rx device is connected through an industrial USB 2.0 connector to an intrinsically safe barrier Ex USB 2.0.

The Ex USB 4-20mA-Rx device a “hot-plug” function which allows them to be connected and disconnected without stopping, shutting down or rebooting the system.

Specifications:

USB connector: micro-B

Width: 20mm

Length: 60mm

Weight: 10g

Channels: 2

Refresh rate: 50Hz

Input impedance: 100Ω

Accuracy: 0.1%

Resolution: 0.001mA

Protection class, according to IEC 61140: class III

USB isolation, dielectric strength (1 min.): 1kV

Supported Operating Systems: Windows, Linux, Mac OS, Android

Сompliance: IP 65, RoHS

Electrical Data:

Uo=5 V

Io=200 mА

Ui=5 V

Ii=200 mА

Ci=10 µF

Ex marking:

Ex ib I Mb

Ex ib IIC T6...T4 Gb X

Ex tb IIIC T85°C...135°C Db

Produced in accordance with IEC 60079-0, IEC 60079-11, IEC 60079-31

Normal operating temperature: 5°C to 40°C

Extended operating temperature*: -30°C to 85°C

*Note: The extended temperature range is defined based on components specifications and has been tested during a limited duration (1h). When using the device in harsh environments for a long period of time, we strongly advise to run extensive tests before going to production.