Datasheet

MB3U, MB3U-I2C
BiSS TO PC-USB ADAPTER
Rev B3, Page 2/7
BiSS Plug Pin Configuration
Pin Name Function
1 VB +12 V Sensor supply (90 mA
max
)*
Optional: powered by ext. supply
2 MA + Clock output P
3 MA - Clock output N
4 VDD +5 V Sensor supply (50 mA
max
)*
5 MO - +5 V High-level signal
Optional: master data output N
6 GND Ground (0 V)
7 SL + Data input P
8 SL - Data input N
9 MO + 0 V Low-level signal
Optional: master data output P
Power Supply Socket
Inner contact Negative pole
Outer contact Pos. pole (9 to 15V DC, 1A
max
)
PC-USB Adapter With I2C Extension
The BiSS and I2C to PC-USB Adapter has an addi-
tional plug for I2C or SPI communication. The USB
port supplies the sensors via the I2C plug with 5 V (up
to 250mA, through Pin 4 - no galvanic isolation). If
there is load applied to the BiSS connector, the max-
imum current supplied via the I2C plug is decreased.
For more power, an additional external power supply is
recommended (the wall power supply does not supply
the I2C plug, see Figure 3). I2C multi-master capability
is not provided.
Technical Data I2C / SPI Interface
• Serial computer bus communication I2C
• Serial computer bus communication SPI
• Sensor supply sourced from the USB port
(+5 V up to 250 mA) without isolation
• I2C data rates of up to 320 kHz
• USB 2.0 compatible
42 x 95 x 24 mm
BiSS Plug
9-pole SUB-D
size approx.
2-pole, 6.6/1.9 mm
Power Supply Socket
10-pole
DIN 45323
I2C Plug
USB-B Plug
4-pole
1
2
Figure 2: iC-MB3 iCSY MB3U-I2C
I2C Plug Pin Configuration For I2C-Link
PIN Name Function
1 SCL Serial Clock Line
2 GND Ground
3 - Reserved
4 +5 V Supply Voltage
5 - Reserved
6 - Reserved
7 SDA Serial Data Line
8 - Reserved
9 SDA Serial Data Line
10 GND Ground
Note: To use I2C, pin 7 and pin 9 must be short.
I2C Plug Pin Configuration For SPI-Link
PIN Name Function
1 SCLK Serial Clock
2 GND Ground
3 - Reserved
4 +5 V Supply Voltage
5 - Reserved
6 - Reserved
7 MOSI Master Out Slave IN
8 NCS Not Chip Select
9 MISO Master In Slave Out
10 GND Ground
* 100 mA for +5V and +12 V available starting from 2008