Inputs / Outputs - Siemens SITRANS F Additional Operating Instructions

SITRANS FX330

4.3 Inputs / Outputs

The terminal assignment of the built-in electrical equipment is described in the standard
documentation. The signal circuits of the vortex flowmeter may only be connected to
downstream devices or circuits that satisfy the requirements of protective extra-low voltage
(PELV).
Only circuits that are suitable for operation in zone 2 hazardous areas may be connected.
Outside of the vortex flowmeter, measures must be taken for the circuits to prevent the rated
voltage from being exceeded by more than 40% due to temporary faults.
Connecting power supply and I/O functions
• Before connecting or disconnecting the electrical connection cables of the device, make sure
that all cables leading to the signal converter are isolated from the ground of the hazardous
area. This also applies to protective earth (PE) and equipotential bonding conductors (PA).
• All connecting cable conductors and shields that are not securely connected to the
equipotential grounding system of the hazardous area shall be carefully isolated from each
other and from ground (test voltage 1500 V
08/2017 - A5E42667474-AA EN
ELECTRICAL CONNECTIONS
for non-intrinsically safe cables).
eff
www.siemens.com/flow
4
17