Structure Guidelines; Warning Messages For Structure Guidelines; Safety Measures At The Installation Location; Overcurrent Protection - WAGO 750 Series Manual

Planning
• Addressability:
Up to 250 I/O modules can be addressed, depending on the head station.
I/O modules that do not have any process or diagnostic data (e.g., distance modules)
do not need to be taken into account when calculating the number.
• Head Station Memory:
Head stations have limited memory for the process image.
• Fieldbus Technology Characteristics

5.2 Structure Guidelines

5.2.1 Warning Messages for Structure Guidelines

WARNING
DIN-Rail Protection Connection!
If voltage is hazardous active on the I/O system, a protective connection of the DIN-rail to
PE is required.
• Take this protective connection into account in your planning!
WARNING
Different Field Supplies on the Power Jumper Contacts!
Different field supplies can be fed into the I/O system. The respective power supply can
be passed on to the following I/O modules via the power jumper contacts.
• In your planning, take into account that the field supply that is fed in is suitable for all
I/O modules within a supply section!

5.2.2 Safety Measures at the Installation Location

Additional Enclosure
The I/O System is an open type device. It must only be installed within appropriate enclo-
sures, cabinets or electrical operation rooms that fulfill at least the following requirements:
• Offer adequate protection against direct or indirect contact.
• Offer adequate protection against UV irradiation.
• Restrict access to authorized personnel and may only be opened with tools.
• Ensure the required pollution degree in the vicinity of the system.
• Prevent fire from spreading outside of the enclosure.
• Guarantee mechanical stability.

5.2.3 Overcurrent Protection

System and field supply are through the head station and/or additional supply modules.
Protect the power supply as specified in the technical product data. Use:
• Supply modules with integrated fuses
• External fuses
• Circuit-breakers
30 System manual | Version: 3.3.1
Serie 750, 753