User manual

CHAPTER 2. HARDWARE DESCRIPTION 11
Console port can be connected from a PC by using a Cisco compatible serial console cable.
Ethernet – serial console adapters are available from Viola Systems. They allow serial console access with the
adapter and straight Ethernet cable. Viola Systems order code is 3170. Contact your local sales office for more
details.
To open serial console access a terminal program is needed. Recommended terminal programs are Tera Term
and Putty. Open the connection using the settings from table 2.6.
2.6.2 Serial port 1
Serial port 1 is configurable to multiple serial formats (RS-232/422/485).
Connector diagram
Pin Function
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI
Connector pinout (RS-232 mode)
Baud rate 115 - 230400
Data bits 8
Parity No parity
Stop bits 1
Flow control CTS/RTS
Serial port configuration
Table 2.7: Serial port 1
DIP switch configuration for serial port 1 is described in table 2.8. By default all are set to “0” position (RS-232
mode). DIP switches 2-4 apply only when port is set in RS-485 mode (DIP switch 1 on “1” position).
Number Function State Explanation
1 RS-232 / RS-485 0 = RS-232, 1 = RS-485 Selects serial port operation mode
2 FULL / HALF 0 = FULL, 1 = HALF Selects between half ( 2-wire) and full duplex (4-wire)
3 BIAS 0 = OFF, 1 = ON RS-485 biasing
4 TERMINATION 0 = OFF, 1 = ON RS-485 termination
Table 2.8: Serial port 1 DIP switches
Warning: Make sure you DO NOT connect RS-422 or RS-485 cables to a serial port configured to RS-232
mode. This could damage the port and the connected equipment.
Serial port pinouts in RS-422 and RS-485 modes are described in table 2.9.
Pin RS-485 full-duplex (4-wire) RS-485 half-duplex (2-wire)
1 - -
2 RXD+ (in) -
3 TXD- (out) TXD/RXD- (out/in)
4 - -
5 GND GND
6 - -
7 TXD+ (out) TXD/RXD+ (out/in)
8 RXD- (in) -
9 - -
Table 2.9: Serial port 1 pinouts in RS-422/485 modes