DEIF XL / BW / BRW-2 Illuminated indicators

Introduction

This document gives guidelines for mounting, connecting and commissioning the XL or BW/BRW-2

instruments. XL and BW/BRW-2 instruments are different from the well-known instruments based on a moving

coil system. The XL and BW/BRW-2 instruments are based on a so-called x-coil system with a rotating

magnet placed in the centre of two coils surrounding the magnet. The combination of a microcontroller and the

cross coil system forms a unique instrument with a very high linearity. The major difference, compared with the

traditional instruments based on a moving coil system, is that the XL and BW/BRW-2 instruments must be

connected to a 24 Vdc supply. This supply is power for the built-in electronics. Because the XL and BW/BRW-2

instruments are based on a microcontroller, it is now possible also to use data communication as input instead

of traditional analogue current or voltage signals.

Unpacking

The XL/BW/BRW-2 indicators are delivered in a cardboard box. To protect the indicator, it is important to store

it in the box until mounting.

The indicators are protected against ESD (static electricity). Therefore, in the process of mounting and wiring

of the indicator, no special attention towards ESD is needed.

For the XL types, the box also contains a number of fixing clamps. The exact number of clamps depends on

the indicator size and the degree of IP protection.

If the indicator is mounted for IP66 protection, a gasket (blue) for IP66 protection will be included. The

contents should be as described in the table below.

For bulkhead mounted types (BW/BRW-2), the box also contains a bracket with two 8 x 12 mm screws for

fixing the bracket on the bulkhead box (5 mm Allen key).