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B.9.4 Mounting Memory Module Holders to MIC1901
The MIC1901 memory module holders (see Figure B - 8) are supplied with the MIC1901 (see sub-
section B.6). You should mount the holders to the MIC1901 board according to B-9, positions E
and F using countersunk head screws M2,5x6 DIN965 (2 pcs.), washers (washer 2.5 DIN125 (2
pcs.) and lock washer 3 DIN6798J (2 pcs.)). The screws and washers are also included in the
MIC1901 delivery checklist.
Figure B- 9
– Installation of holders to MIC1901
B.10 Operating Conditions of the MIC1901 and MTBF
The device must be able to operate under the following climatic and mechanical conditions:
Table B- 7 - MIC1901 operating conditions
Type of exposure
Parameter name
Parameter value
Document
Temperature change
Low temperature
- 40
°С
GOST 28209-89
(IEC 68-2-14-84)
High temperature
+ 85
°С
Sinusoidal vibration
Frequency range (Hz)
10…500
GOST 28203-89
(IEC 68-2-6-82)
Acceleration, g
2
Single shocks
Peak acceleration, g
30
GOST 28213-89
(IEC 68-2-27-87)
Multiple shocks
Peak acceleration, g
10
GOST 28215-89
(IEC 68-2-27-87)
Number of shocks
1000
The modules are resistant to cyclic damp heat at ambient temperature of + (55±2) °C, relative
humidity (93±3)% (with conformal coating: \Coated option) in accordance with the GOST 28216-89
standard (IEC 68-2-30-82).
MTBF (Mean Time Between Failure) of the MIC1901 is min. 1,900,000 hours.