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3.6.4
Connecting the functional grounding and power supply to the connection box
The power supply for the HMI device is connected to a terminal strip in the connection box.
The connection box has reverse polarity protection.
24 V DC power supply
If the supply voltage is outside the specified range, it may cause the HMI device to
malfunction. This can result in personal injury or material damage.
Use a 24 V DC power supply with the following properties for the connection box:
• Safe electrical isolation according to IEC 60364-4-41 or HD 384.04.41 (VDE 0100,
• The power supply provides safety extra-low voltage according to SELV/PELV up to a
NOTICE
External protective circuit
An external protective circuit is required for operation with 24 V DC; please refer to
section 7 "Lightning protection and overvoltage protection" in the following function manual:
"Designing interference-free SIMATIC S7-1500, ET 200MP, ET 200SP, ET 200AL
controllers (https://support.industry.siemens.com/cs/ww/en/view/59193566)".
Requirement
● The power supply meets the requirements set out in "Technical specifications
(Page 165)".
● The connection box standard or advanced is open.
● The power cable wires have been stripped by 6 mm.
● Power supply cables and equipotential bonding conductor, cross-section 1.5 mm
● Wire end ferrules ∅ 0.5 mm.
Procedure
1. For connection box standard and connection box advanced
Thread the cables through the corresponding screw glands.
2. Place a wire end ferrule on each wire to be connected.
TP1000F Mobile RO
Operating Instructions, 08/2017, A5E39831415-AA
WARNING
Part 410).
maximum of 36 V DC and also does not exceed
the information in the data sheet for overvoltage protection in the event of an internal
error or take appropriate voltage-limiting measures, such as the use of a surge
protection device.
Installing system components
3.6 Connecting the connection box
= 36 V DC in case of fault. Refer to
m
2
55
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