750 XTR Series
Planning
System manual | Version: 2.0.0
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Head station memory:
Head stations have a limited memory for the process image.
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Fieldbus technology characteristics
5.2 Structure Guidelines
5.2.1 Installation Site and Touch-Proof Protection
The WAGO I/O-System is an open system. As such, it must only be installed within ap-
propriate housings, 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.
5.2.2 Overcurrent Protection
System and field supply are through the head station and/or additional supply modules.
Without overcurrent protection, the electronics can be damaged.
In the event of a fault, insufficient overcurrent protection may even present a possible fire
hazard if significant overheating occurs due to excessive current flow in the components.
Therefore, always dimension the overcurrent protection according to the anticipated
power consumption.
For components that work with extra-low voltage, only SELV/PELV voltage sources
should be used.
If single voltage source powers multiple components, it must be designed according to
the component with the strictest electrical safety requirements.
For components which are only allowed to be supplied by SELV voltage sources, these
requirements are listed in the technical data (see the corresponding
&
Product Man-
ual
).
Most components in the WAGO I/O System 750 XTR have no internal overcurrent protec-
tion. Therefore, appropriate overcurrent production must always be implemented exter-
nally for the power supply to these components, e.g., via fuses.
The maximum permissible current is listed in the technical data of the components used.
Fuse protection of the field supply is possible with the following power supply modules:
Table 6: Power Supply Modules
Item No.
Name
750-601/040-000
Power Supply 24 VDC Fuse XTR
750-610/040-000
Power Supply 24 VDC Fuse Diagn XTR
750-606/040-000
Power Supply 24 VDC Diagn for Ex i XTR Modules
