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CompuLab Ltd. FACE Modules – HW Specifications Page 29 of 63

4.5 Configuration

4.5.1 Serial Ports Configuration

Each serial port can be individually configured to act in RS232 mode or RS485 half/full duplex mode. The

configuration is selected in fit-PC3 BIOS setup.

The default selection between RS232 and RS485/RS422 is determined by E1 jumper position. Default

mode determines the power-up state of the Dual Protocol Transceiver. It is applied to all ports and

remains valid in case that software configuration is not performed.

The options of jumper E1 selections are detailed in Table 4.

Table 4 Jumper E1 options

Jumper Position

Default Serial Protocol

Assembled

RS232

Removed

RS485 / RS422

Note: The jumper is assembled by default.

Figure 12 – Jumper E1 location

After power-up, any individual port can be configured using software controlled SMBus system

management protocol.

4.5.2 CAN Bus power supply

By default, the FM-SER consumes power from the CAN bus.

After power-up, the power supply option can be determined by a GPIO line connected to the motherboard,

and is fully software controlled.

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CompuLab IPC2 Bedienungsanleitung Seite 29