Impulse 2113 Instrukcja Użytkownika Pobierz pdf (Strona 9)

Hardware Configuration

RS-232/422/485 Multi-Interface Products

Items# 2109, 2113, 2209, 2213

Dip switches on SeaLINK USB multi-interface serial adapters provide the ability to

communicate with RS-232, RS-422 or RS-485 devices. These switches are also used

to set RS-485 enable modes and termination options. Single port models have a

single eight-position dip switch. Two port models have a pair of eight-position dip

switches allowing each port to be individually configured. All configuration changes

can be made without opening the enclosure.

Dip Switches

Switch ON OFF

8 2 Wire – 4 Wire –

7 2 Wire + 4 Wire +

6 RD 1K PU –

5 RD 1K PD –

4 120Ω Termination –

3 Echo Off Echo On

2 RS-485 RS-422

1 RS-422/485 RS-232

Switch Function

8 RS-485 Option, OFF for RS-232, RS-422

ON: Connects TX– and RX– for two-wire operation

OFF: Separates TX– and RX– for four-wire operation

7 RS-485 Option, OFF for RS-232, RS-422

ON: Connects TX+ and RX+ for two-wire operation

OFF: Separates TX+ and RX+ for four-wire operation

6 RS-485 Option, OFF for RS-232, RS-422

ON: Adds a 1K Ω pull-up resistor to RX+

OFF: Leaves RX+ floating

5 RS-485 Option, OFF for RS-232, RS-422

ON: Adds a 1K Ω pull-down resistor to RX–

OFF: Leaves RX– floating

4 RS-422, RS-485 Option, OFF for RS-232

ON: Adds a 120Ω termination resistor between RX+ and RX–

OFF: No line termination

3 Two-Wire RS-485 Option, OFF for RS-232, RS-422, Four-Wire RS-485

ON: ECHO Off. The receiver is disabled when the transmitter is enabled.

In a two-wire setup the receiver will not echo back transmitted data

OFF: ECHO On. The receiver is always enabled. In a two-wire setup the

receiver will echo back all transmitted data

2 Mode Selection

ON: RS-485 mode. The transmitter lines TX+ and TX– are switched to

high impedance when the device is not actively transmitting data

OFF: RS-422 mode. The transmitter lines TX+ and TX– are always driven

1 Mode Selection

ON: RS-422, RS-485 mode

OFF: RS-232 mode

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