User's Manual l MBa57xx UM 0100 l © 2020, TQ-Systems GmbH
Page 52
7.
SAFETY REQUIREMENTS AND PROTECTIVE REGULATIONS
7.1
EMC
Because the MBa57xx is a development platform, no EMC specific tests have been carried out.
Nevertheless DIN EN 55022:2010 class A was taken into account during development:
In order to avoid interspersion on the signal path from the input to the protection circuit in the system, the protection against
electrostatic discharge should be arranged directly at the inputs of a system.
Following measures are recommended for a carrier board:
•
Generally applicable:
Shielding of inputs (shielding connected well to ground / housing on both ends)
•
Supply voltages:
Suppressor diodes
•
Slow signals:
RC filtering, Zener diodes
•
Fast signals:
Protection components, e.g., suppressor diode arrays
7.2
ESD
Most of the interfaces on the MBa57xx are protected against electrostatic discharge.
Interfaces providing an ESD protection are to be taken from the circuit diagram.
7.3
Operational safety and personal security
Due to the occurring voltages (
≤
30 V DC), tests with respect to the operational and personal safety have not been carried out.
8.
CLIMATIC AND OPERATIONAL CONDITIONS
In general reliable operation is given when the following conditions are met:
Table 58:
Climatic and operational conditions MBa57xx (without TQMa57xx)
Parameter
Range
Remark
Permitted environmental temperature
0 °C to +70 °C
Without Lithium battery CR2032
Permitted environmental temperature
0 °C to +60 °C
With Lithium battery CR2032
Permitted storage temperature
–10 °C to +60 °C
With Lithium battery CR2032
Relative humidity (operation / storing)
10 % to 90 %
Not condensing
8.1
Protection against external effects
Protection class IP00 was defined for the MBa57xx. There is no protection against foreign objects, touch or humidity.
8.2
Reliability and service life
No detailed MTBF calculation has been done for the MBa57xx. The MBa57xx is designed to be insensitive to vibration and
impact. High quality industrial grade connectors are assembled on the MBa57xx.
11:
The JTAG and PMIC interfaces do not provide ESD protection.