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emVIEW-7/RPI3 (Hardware and Software Manual) • Installation
3.2.4
Console (RS232)
The RS232 (Console) serial interface is provided by Raspberry PI board. The connector is a standard
9 pin D-SUB plug, but the interface is connected with two wires only, table 4 shows the pin out.
1
6
9pin male D-Sub
3.2.5
Serial Port (RS232/RS485)
The Serial Port is implemented by SC16IS740 UART. A multiprotocol transceiver is utilized to support
both RS232 and RS485. The interface signals are located on the multi connector, refer to table 5.
1
2
RS232 mode is selected by shorting jumper J301, else RS485 mode is selected. The case has to be
opened to access this jumper.
In RS232 mode, the signals TxD (out), RxD (in), RTS (out) and CTS (in) are provided.
In the RS485 mode the bidirectional differential signals D+ and D- are provided. When the transmitter
is enabled and no data is send (MARK=1), then D+ > D-. Refer to section 6 (Programming
Information) for more information about RS485 control.
An internal 120 Ohm termination resistor can be enabled between D+ and D- by shorting jumper J300.
The case has to be opened to access this jumper.
3.2.6
CAN
The CAN interface is implemented with a MCP2515 controller chip. The interface is located on the
multi connector, refer to table 6. The CAN interface signals support ISO 11898-2 (high speed) and are
isolated from system logic.
1
2
An internal 120 Ohm CAN termination resistor is enabled by shorted jumper J400. To disable the
termination, the case has to be opened to remove this jumper.
CAUTION
Factory setting: Jumper J400 is not set by default, and therefore the 120 Ohm
termination resistor is disabled!
Rev. 1.0
1 n.c.
2 RxD
3 TxD
4 n.c.
5 GND
15
16
11
12
6
7
8
9
table 4: Console (RS232) connector
15 TxD , B / D+
17 RxD
19 GND
table 5: Serial Port connector pins
11 CAN-H
13 GND-CAN
table 6: CAN connector pins
3 - 13
n.c.
n.c.
n.c.
n.c.
16 RTS , A / D-
18 CTS
20
12 CAN-L
14 n.c.
© Janz Tec AG
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