Using EMC Kits

Introduction

To help shield the BMEAHI0812 eX80 HART analog input module from electro-magnetic and radio interference, use EMC kits to ground the shielded cables connected to the module.

Cable Shielding

CAUTION

UNEXPECTED BEHAVIOR OF APPLICATION

To reduce electromagnetic perturbations, use a BMX XSP 0400/0800/1200 EMC kit to connect the shielding.

Electromagnetic perturbations may lead to an unexpected behavior of the application.

Failure to follow these instructions can result in injury or equipment damage.

Connect the cable shielding to the grounding bar. Clamp the shielding to the grounding bar on the module side. Use the following EMC kits to make these connections:

BMX XSP 0400 EMC kit, for use with the BME XBP 0400 rack
BMX XSP 0800 EMC kit, for use with the BME XBP 0800 rack
BMX XSP 1200 EMC kit, for use with the BME XBP 1200 rack

DANGER

HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH

While mounting / removing the modules:

Confirm that each terminal block is still connected to the shield bar.
Disconnect voltage supplying sensors and pre-actuators.

Failure to follow these instructions will result in death or serious injury.

BMEAHI0812

Shield bar

Clamp

To sensors

Reference of Sensors in Relation to the Ground

In order for the acquisition system to operate correctly, it is recommended to consider taking the following steps:

place sensors close together (not more than a few meters apart)
reference each sensor to a single point, which is connected to the protective ground

Using the Sensors Referenced in Relation to the Ground

The sensors are connected as indicated in the following diagram:

If the sensors are referenced in relation to the ground, this can return a remote ground potential to the terminal block. To help avoid this situation, follow these rules:

The potential needs to be less than the permitted low voltage of ± 500 Vdc.
Setting a sensor point to a reference potential generates a leakage current. Check that leakage currents generated do not disturb the system.

NOTE: Sensors and other peripherals may be connected to a grounding point some distance from the module. Such remote ground references may carry considerable potential differences with respect to local ground. Induced currents do not affect the measurement or integrity of the system.

DANGER

HAZARD OF ELECTRIC SHOCK

Confirm that sensors and other peripherals are not exposed through grounding points to voltage potential greater than acceptable limits.

Failure to follow these instructions will result in death or serious injury.