Ex eb and Ex tb Field mounting loop powered 4/20mA indicators

Product catalog summary

Introduction
This document introduces a new range of 4/20mA loop powered indicators designed for hazardous areas. These indicators offer an alternative to traditional flameproof Ex d indicators, providing cost-effective and user-friendly solutions with larger displays and multiple explosion protection techniques.

Specifications
The indicators are certified for use in Zones 1, 2, 21, and 22, with IECEx and ATEX certifications. They feature Ex eb and Ex tb protection, allowing installation in gas and dust atmospheres. The displays are large and easy to read, with options for 4-digit (34mm high) or 5-digit (29mm high) displays, the latter including a 31-segment bargraph.

Features
- Less expensive than flameproof Ex d indicators
- Larger, easier-to-read displays
- No barrier or isolator required
- Tactile push buttons for hazardous areas
- Robust IP66 impact-resistant enclosure
- Optional loop powered backlight
- Optional pipe and panel mounting kits

Installation and Use
The indicators can be safely connected in Ex d, Ex e, Ex p, or Ex m loops and require only low-cost Ex e glands. They are suitable for monitoring 4/20mA process variables in hazardous areas, providing a remote display for instruments with a 4/20mA output.

Applications
Typical applications include use in hazardous areas containing Ex d, Ex p, Ex e, or Ex m instruments. The indicators can replace flameproof Ex d indicators in almost any 4/20mA hazardous area application.

Models and Options
Two models are available: BA304SG and BA324SG. The BA304SG features a 4-digit display, while the BA324SG includes a 5-digit display with a bargraph. Both models offer options for backlighting, scale card replacement, legend plates, and mounting kits.

Conclusion
These new indicators provide a cost-effective and efficient solution for hazardous area monitoring, with enhanced display features and simplified installation requirements.

Catalog excerpts

Ex eb and Ex tb Field mounting loop powered 4/20mA indicators-1

Ex eb and Ex tb Field mounting loop powered 4/20mA indicators for use in Zones 1, 2, 21 & 22 www.beka.co.uk > ess expensive than flameproof Ex d indicators L > Larger easier to read displays > Gas and dust certification > No barrier or isolator required

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Ex eb and Ex tb Field mounting loop powered 4/20mA indicators-2

Less expensive alternatives for flameproof Ex d indicators with larger displays This innovative range of 4/20mA loop powered indicators employ multiple explosion protection techniques to replicate the safety features and utilise the simple installation rules for flameproof Ex d indicators. The new models may be used in exactly the same way as flameproof indicators, but have the following advantages: > expensive Less > Larger displays > be safely connected in an Ex d, Ex e, Ex p or Ex m loop May > require low cost Ex e glands Only > be installed in gas and dust atmospheres May > Tactile push buttons...

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Ex eb and Ex tb Field mounting loop powered 4/20mA indicators-3

Typical applications The BA304SG and BA324SG may be used in place of a flameproof Ex d indicator in almost any 4/20mA hazardous area applications including those containing Ex d, Ex p, Ex e or Ex m instruments. Hazardous area Zone 1, 2, 21 or 22 Safe area Hazardous area Zone 1, 2, 21 or 22 Cables for fixed installations should comply with IEC 60079-14 Clause 9. There are no additional requirements for Ex eb and Ex tb protection. Safe area Hazardous area Zone 1 or 2 Safe area Instrument with 4/20mA output Both models may be driven from a safe area instrument with a 4/20mA output to provide a remote...

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Ex eb and Ex tb Field mounting loop powered 4/20mA indicators-4

Mounting Number of digits Display height 31 Segment Bargraph + — 4/20mA Input OPTIONS: Backlight Loop powered. Scale card replacement Slide-in card with printed legend replacement showing custom units of measurement. Legend plate Stainless steel, can be supplied laser engraved with customer specified information. Pipe mounting kit BA393G 'G' 316 stainless steel for mounting indicator to vertical or horizontal pipe, Panel mounting kit BA394 'G' 316 stainless steel for mounting indicator in panel aperture. BA393G 316 Stainless Steel pipe mounting kit BA394G 316 Stainless Steel panel mounting kit...

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