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Atex Considerations - Siemens LDS 6 Operating Instructions Manual

In-situ laser gas analyzer

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Table of Contents

Installation Guidelines

3.4 ATEX considerations

3.4

ATEX considerations

A hybrid cable is used to connect the transmitter sensor to the barrier.

Connecting Transmitter Sensor to Barrier

1. Cut off the pre-mounted phoenix contact at the hybrid cable.

2. Insert the hybrid cables (one for each channel) in the feed throughs at the top of the

barrier box. Secure each cable with a gasket.

3. Connect each hybrid cable to the Surge Protection Devices SD32X (yellow). - (brown

cable) shall be connected to inlet number 4 and + (green cable) to inlet number 5.

4. Connect the hybrid cable to the transmitter sensor.

Connecting Receiver to Transmitter Sensor

For ATEX versions of the LDS 6 the receiver sensor are pre-mounted with special ATEX

electronics and surge protection. The green phoenix contact mounted on the sensor card is

already connected with a red wire for +24 V and a black wire for GND. Two additional wires

should be connected to the phoenix connector. These wires come from the loop cable.

1. Connect the green wire next to the red one (for 24 V) on the phoenix contact.

2. Connect the brown wire next to the black one (for GND) on the phoenix contact.

Connect the sensor housings, on both the transmitter and the receiver side, to earth using

the pre-mounted 2 meters earth cable (yellow-green).