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sigfox MODBUS MASTER - Guide utilisateur / User guide version V2.1.0
1.4. Technical Specifications
1.4.1 General characteristics
Parameters
Supply
Maximum supply
Working temperature
Dimensions
Weight
Casing
sigfox zone
MODBUS protocol used
1.4.2 Physical interface characteristics
Parameters
Cables length
Number of wires on power cable
External power supply voltage
Number of wires of sensor (slave) cable
RS232
RS485
Sensor (slave) power supply
Current max returned to the sensor (provided that the power supply
used can provide this current)
VALUE
DC 6-30V
90mA
-25°C / +70°C
105 x 50 x 27mm
70g
IP 67
RC1
Remote Terminal Unit (RTU)
VALUE
70cm
2 wires: +V, GND
DC 6-30V
6 wires : RTS/TX-, CTS/RX-, RX/RX+, TX/TX+, Ground, Sensor power
supply
3 useful signals: RX, TX, Ground (RTS and CTS are not handled)
Voltages shown are common mode voltages.
Voltages on inputs/outputs: +/-5V typ | +/-15V max
5 useful signals : TX-, RX-, RX+, TX+, Ground
Voltages shown are common mode voltages.
The product is master of the link: the slave must not inject voltage on
the bus!
Voltages on inputs/outputs: +/-1.5V typ (3V differential)
Polarization resistors: 560 Ohms
Termination resistor: 120 Ohms
= external power supply voltage
500 mA
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