Sicspro Load Cell - Mettler Toledo Division 2 IND570 Serie Guia De Instalacion

página de 180

/ 180
Contenido
Tabla de contenido
Marcadores

Tabla de contenido

Idiomas disponibles

The solid state discrete I/O options for the IND570xx terminal are rated non-incendive and

intrinsically safe [ic]. You cannot combine incendive and non-incendive connections or intrinsically

safe [ic] and non-intrinsically safe connections to the I/O. If any of the discrete I/O connections are

incendive or non-intrinsically safe, they must all be treated as incendive or non-intrinsically safe.

When the discrete inputs are selected as "Active" via the slide switch on the PCB, use of standard

pushbutton switches are permitted as the supply voltage is generated by the IND570 and returns to

the IND570. The signal is non-incendive and intrinsically safe [ic]. An enclosure appropriate for the

environment must be used to house the switches.

When the discrete inputs are selected as "Passive" via the slide switch on the PCB, a non-incendive

or intrinsically safe [ic] power source or an approved barrier is required to limit the applied voltage

and current. NIFW or entity values must be compared between the power source (or barrier), the

IND570xx terminal and the switch or other connected device. If the NIFW/entity values do not match

properly, then the discrete inputs must be treated as incendive or non-intrinsically safe and

protected accordingly. If switches are used, an enclosure appropriate for the environment must be

used to house the switches.

To be non-incendive or intrinsically safe [ic], the discrete outputs require the use of a non-incendive

or intrinsically safe [ic] power source or the power source must be limited by an approved barrier.

The non-incendive field circuit wiring (NIFW) and intrinsically safe [ic] entity parameters are listed

next.

2.2.3.