Electrical connections
IM/265Gx/Ax-EN-07 265Gx, 265Ax 33
Grounding
A terminal is available on both the outside of the housing and in the plug for grounding (PE) the
transmitter. Both terminals are electrically connected to one another.
5.5 Protective conductor / Grounding
The transmitter operates within the specified levels of accuracy for common-mode voltages of
up to 250 V between signal lines and housings.
As a general rule, the transmitter must be supplied by a voltage source with a maximum output
voltage of 60 V DC, which is safely isolated from the line supply. To ensure that the safety
objectives of the Low Voltage Directive are achieved, and the corresponding EN 61010
regulations governing installation of electrical equipment are observed, the housing must have a
protective system (e.g., grounding, protective conductor) that is activated if voltages > 60 V DC
occur.
5.6 Integrated lightning protection (optional)
The transmitter housing must be connected using the grounding terminal (PA), by means of a
short connection with the equipotential bonding. Equipotential bonding (minimum diameter:
4 mm
2
(AWG 12)) is required throughout the cable routing area.
In the case of transmitters with integrated lightning protection (optional), the intrinsically safe
circuit is connected to the equipotential bonding for safety reasons.
IMPORTANT (NOTE)
Test voltage withstand capability can no longer be ensured when this protective circuit is used.
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