User manual

1.4.2. USB, CAN and SERIAL Board

The optional carrier board includes the standard elements and the following ones:

Serial ports (TTL, RS-232, RS-422, and RS-485)

The TTL port is used for the short range transmission of data. The port has a

standard signal level of 0 V through 3.3 V.

The RS-232 is used for the transmission of data. It defines the signals connection

between the data terminal equipment (such as a computer) and the data circuit-

terminating equipment (such as a modem).

The RS-422 (ANSI/TIA/EIA-422-B), a four-wire configuration, specifies the electrical

characteristics of the digital signaling circuit. It can transmit data at rates as high as

10 Mbit/s or may be sent on cables as long as 1500 meters. Some systems directly

interconnect and may be used to extend the range of an RS-232 connection.

The RS-485 (ANSI/TIA/IEA-485) is a two-wire or four-wire differential serial

communication port. It is often used in electrically noisy environments.

Microcontroller MCU

The source and control assembly is equipped with an MCU on the carrier board. It is

provided to transmit data from the receiver module through the communication

ports.

USB interface

The USB interface is a compatible 2.0, full-speed 12-MBit/s port. This interface

emulates a VCP (virtual COM port) used as a serial port.

Application and reset switch

The reset switch restarts the module. This can be used as an alternative to cycling

the power.

Serial link configuration DIP switches

The source and control assembly is equipped with ten DIP switches. Five of them are

used to configure serial link 1 (see Figure 2 and Figure 3).

CAN bus interface

The CAN bus is implemented via a differential pair. The ISO 11898 standard

describes the CAN technology. The interface has a level of 3.3 V.