New USB Intrinsic Safety Barrier Installed In A Purged & Pressurized Enclosure For Stand-Alone Applications

Published 21 Oct 2019

Pepperl + Fuchs

USB Intrinsic Safety Barrier

SK-PC-Z1D1-UU1-10-HS

Pepperl+Fuchs are pleased to announce an addition to their HMI device accessories range: the new USB intrinsic safety barrier SK-PC-Z1D1-UU1-10-HS.

The new barrier connects a host device, such as an industrial PC, to a USB device, such as a Pepperl+Fuchs EXTA2/EXTA3 keyboard or a flash drive, in a Zone 1/21 environment.

The barrier is able to change the two USB channels into intrinsically safe circuits enabling transmission of USB signals from and into hazardous areas.

USB Intrinsic Safety Barrier – SK-PC-Z1D1-UU1-10-HS

SK-PC-Z1D1-UU1-10-HS

Features

For installation in Zone 2 environments, supplies keyboards in Zone 1/21
2 USB channels
Data rates up to 480 Mbit/s
Max. cable length 10 m (5 m before device, 5 m after device)
Powered via USB, no separate power connection required
Powered via USB host—no extra power supply needed
Flexible installation in non-hazardous areas
Various options allow installation in explosion-hazardous locations
Rugged design
Tested and qualified for use with Pepperl+Fuchs EXTA2 keyboards and qualified flash drives

Rugged Design and Flexible Installation

SK-PC-Z1D1-UU1-10-HS USB intrinsic safety barrier is shock and vibration resistant thanks to its rugged design.

Two 4-screw terminal blocks ensure a robust connection. Flexible installation is a major advantage and can be adapted to suit the needs of the customer and application. With its wide operating temperature range of -20 °C up to +60 °C, the USB barrier is also suitable for use in extreme temperatures.

A suitable enclosure that corresponds to at least IP54 in accordance with IEC/EN 60079-0 allows the barrier to be used in Zone 2/22, while the connected EXTA2 keyboard can be installed in Zone 2/22 or 1/21.

The USB intrinsic safety barrier is installed in the non-hazardous area, while connected devices are in explosion-hazardous areas.

Another option for use in explosion-hazardous areas is installing the USB barrier in a purged and pressurized enclosure. Since the USB barrier provides an intrinsically safe circuit, the connected USB keyboard does not need to be purged and pressurized if it is certified for use in Zone 1/21.

A suitable enclosure allows the USB barrier to be installed in Zone 2

The USB barrier installed in a purged and pressurized enclosure.

USB Intrinsic Safety Barrier

Specification

Supply
Input voltage	4.75 … 5.1 V DC (Um = 60 V SELV/PELV)
Input current	max. 200 mA
Power consumption	max. 2.7 W
Interface
Interface type	4-screw terminal MSTBT 2.5 HC / 4-STP GY7035 USB 2.0 compatible
Directive conformity
Electromagnetic compatibility
Directive 2014/30/EU	EN 61326-1:2013 (industrial locations) , EN 61000-6-4:2007+A1:2011
RoHS
Directive 2011/65/EU (RoHS)	EN 50581:2012-09
Ambient conditions
Operating temperature	-20 … 60 °C (-4 … 140 °F) -20 °C ≤ Ta ≤ 60 °C / 70 °C (depending on installation conditions)
Storage temperature	-40 … 85 °C (-40 … 185 °F)
Relative humidity	< 95 % non-condensing
Shock resistance	18 shocks 15 g , 11 ms all axis, IEC 60068-2-27
Vibration resistance	10 … 150 Hz , ± 0.075 mm, 1 g, 10 cycles per axis according to EN 60068-2-6
Mechanical specifications
Degree of protection	IP20
Material	ME MAX 45 2-2 KMGY-2713706 refer to 42-3388
Cable	shielded cables must be used
Mass	approx. 220 g
Dimensions	45 mm x 99 mm x 114 mm
Mounting	DIN rail mounting
Cable length	5 m before device , 5 m after device , 10 m total
Data for application in connection with hazardous areas
EU-Type Examination Certificate	EXA 18 ATEX 0054X
Marking	Ex II 3(2) G Ex ec [ib Gb] IIC T4 Gc Ex II (2) D [Ex ib Db] IIIC
Directive conformity
Directive 2014/34/EU	EN 60079-0:2012+A11:2013 , EN 60079-7:2015 , EN 60079-11:2012
International approvals
IECEx approval	IECEx EXA 18.0008X
Approved for	Ex ec [ib Gb] IIC T4 Gc [Ex ib Db] IIIC
Standards	IEC 60079-0:2017 , IEC 60079-7:2015 , IEC 60079-11:2011

New USB Intrinsic Safety Barrier – Dimensions

ELECTRICAL & PROCESS INSTRUMENTATION EQUIPMENT

FOR EXPLOSIVE ATMOSPHERES

Thorne & Derrick are Specialist Distributors of Hazardous Area & Explosion Proof Equipment with IECEx & ATEX Certifications to the onshore and offshore oil, gas, petrochemicals and process industries.