Optosense LLC
USER MANUAL
Design department
MIPEX-04 ULTRA-LOW POWER INFRARED GAS SENSOR
ESAT.100000.00.02 UM
Revision 02
December 12th, 2016
Page 11 of 41
THE SOLE PROPERTY OF OPTOSENSE LLC. ANY REPRODUCTION WITHOUT THE WRITTEN PERMISSION OF OPTOSENSE LLC IS PROHIBITED.
Sensor transmits information about measured concentration via UART interface. Sensor
supports embedded self-testing while operating and is designed for continuous 24/7 operation.
End-user equipment UART transceiver should meet the requirements of standards
IEC 60079-0, IEC 60079-11.
Sensor UART transceiver communication properties are:
High logic level for transmitting line TxD is +2.1 V;
High logic level for receiving line RxD is in range of +
2.1…+2.3 V;
Low logic level is in range of +
0.1…+0.6 V;
Maximum output current of UART is not more than 2.1 mA.
Fig. 1. Typical sensor voltage drop after power up (load resistance R = 100 Ohm)
-0.3
-0.1
0.1
0.3
0.5
0.7
0.9
1.1
1.3
1.5
1.7
1.9
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
V
olt
ag
e
U
,
V
Time T, s