User guide

EG_GenPro25e_1055_UG_000_UK Page 62 / 66
Descriptions and non-contractual illustrations in this document are given as an indication only.
ERCO & GENER reserves the right to make any modification.
Dct_427_01
8.2.9 Characteristics of the serial link (UART)
Table 45 : Characteristics of the UART
Characteristics Symbols Conditions Min. Typ. Max. Unit
Input Voltage – Range V
Input
Input Voltage – Range -25 +25 V
dc
Input Voltage – Low V
IL
Input Voltage – Low 0.4 1.3 V
dc
Input Voltage – High V
IH
Input Voltage – High 2 24 V
dc
Input Hysteresis V
Hys
Input Hysteresis 0.14 V
dc
Input Resistance R
in
Input Resistance 3 5 7 K
Output Voltage V
out
All transmitter outputs
loaded with 3 k to
ground
±5 ±6.4 V
dc
Transmitter Output Resistance RR
out
300 
RS-232 Output Short-Circuit
Current
I
cc
±15 ±60 mA
8.3 Environmental characteristics
To ensure a correct functioning of the modem, the limits listed in the table below must be respected.
Table 46 : Environmental characteristics
Operating temperature range
-20 °C to +60 °C
Storage temperature range
-40 °C to +85 °C
Operating humidity without condensation
HR < 70% @ +55°C
Atmospheric pressure
700 hPa to 1060 hPa (-400 m to 3000 m)
If the battery option is present, the environmental conditions are different. See table below.
Operating temperature range
Battery charging
0 °C to +45 °C
Battery discharging
-20 °C to +45 °C
Storage temperature range
1 year of storage between -20°C to + 35°C
3 months of storage between -20°C to + 45°C
1 month of storage between -20°C to + 60°C
Relative humidity
65% ±20%