Flo-Dar™ Intrinsically Safe Sensor - Hachflow

3.3.2 Electrical installation in a hazardous location3.3.2.1 Install the barrierInstallationA barrier with appropriate entity parameters must be installed between the sensor and thelogger or controller for installation in hazardous locations. If the SVS option is used, anadditional barrier with appropriate entity parameters must also be installed between theSVS component and the logger or controller.A barrier must be installed when the Flo-Dar sensor is installed in a hazardous locationas defined in section 3.1 on page 9. A barrier limits the power parameters to the devicethat is located in the hazardous area. The barrier and the logger or controller must alwaysbe installed in a non-hazardous location.The barrier has a dielectric strength of 500 Vrms between the intrinsically safe outputsand the frame of the apparatus. Separation between the intrinsically safe outputs andconnections to non-intrinsically safe devices and separation between separateintrinsically safe output channels (power, RS485A and RS485B) should be maintained inaccordance with the installation instructions and markings since there is no galvanicisolation between these circuits.Procedure1. Install the barrier on a wall in a non-hazardous environment (Figure 2 on page 12).2. Follow the control drawings provided (section 3.4 on page 15) and all codes andregulations for connection to the sensor in the hazardous location.11