Polarity Protection; Cable Layout - Pilz PMI v315 ATEX Manuel D'utilisation

Installation and Wiring

Polarity protection

CAUTION!
The PMI has polarity protection. To ensure that the polarity protection is
working, follow the instructions below when commissioning the PMI:
• Remove all connections to external devices.
• Connect the PMI to the supply voltage.
• Switch on the supply voltage.
• If the PMI fails to start, the connections probably have reverse polarity.
In this case, swap the connections.
• Connect the PC or other periphery devices after the PMI has been
started.

Cable layout

• Electrical or electronic components which could cause interference
(contactors, thyristors, relay coils and solenoid valve coils) should be
physically separate from data lines.
We recommend you use a sheet metal (MU metal) bulkhead between
both areas.
• Data lines and power lines should be laid separately to avoid capacitive
and inductive transmission (recommended minimum distance = 10 cm/
3.94").
• Screened data lines should also be laid in a different cable duct to the
main power lines.
• Power lines should be as short as possible
• Power lines should be twisted pair cables.
5 - 6 Operating Manual: PMI v315 ATEX/PMI o315 ATEX