ROTRONIC XB OEM - Manual (Page 19)

E-M-XB-V1_10
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
Instruction Manual
Document Type
XB Humidity Temperature Transmitter
User Guide
Document title
Page 19 of 27
© 2008; Rotronic AG E-M-XB-V1_10
7 Operation
7.1 Minimum load requirements for the XB3 with voltage outputs
The following requirements apply to any external device or circuit connected to the XB3 transmitter with
voltage outputs:
In the situation where the external device uses an internal pull-up resistor the value of this resistor should
meet the requirements shown below. It is also necessary to add a pull-down resistor RL connected to ground
in order to be able to read 100% of the range of the XB3 voltage output.
7.2 XB2 and XB3 transmitters (analog outputs)
If so desired, use the HW4 software to configure the XB transmitter. Complete the mechanical and electrical
installation and simply power up the transmitter.
XB3 output signal Input resistance RL
0…1V >=1kOhm
0…5V >=5kOhm
0…10V >=10kOhm
XB3 signal VCC R pull-up RL
0…1V 3.3V ≥ 250 kOhm 1 kOhm
XB3 signal VCC R pull-up RL
0…1V 5.0V ≥ 400 kOhm 1 kOhm
0…5V 5.0V ≥ 400 kOhm 5 kOhm
XB3 signal VCC R pull-up RL
0…1V 10.0V ≥ 1 MOhm 1 kOhm
0…5V 10.0V ≥ 1 MOhm 5 kOhm
0…10V 10.0V ≥ 1 MOhm 10 kOhm
RL
GND
XB3
Voltage Output
R Pull-up
RL
GND
VCC
XB3
Voltage Output