Black Box SW591C, SW590A-R2 manual 3.3Functions and Arrangement of the Switch Banks, Installation

The board layout for the Four-Port Expansion Board is shown on this page (Fig. 2). If you have ordered one, check your Board to make sure it matches.

NOTE: Every time you change the DIP switch settings, you must press the reset button located on the front panel of the switch, or unplug the power supply. The COS-II will not process any data during a reset.

A note on charts: you’ll find all the charts printed in this chapter duplicated either in the Appendix or in the Quick Reference Guide.

3.3Functions and Arrangement of the Switch Banks

On the standard board there are seven banks of DIP switches, of which five control the characteristics of the individual ports (SWA through SWE). The remaining two banks (SWF, SWG) control options that affect the entire system. The Four-Port Expansion Board adds individual port banks SWH through SWK.

CHAPTER 3: Installation

A note on terminology: This manual will use the following system to designate individual switches within each switch bank. The bank label will be given first, followed by a hyphen and then the number of the DIP switch. “SWA-6” refers to the sixth DIP switch of Switch Bank A. Also, the words “ON” and “OFF” are used in the switch charts, but your banks may have the words “CLOSED” and “OPEN” printed instead. “CLOSED” is equivalent to “ON,” and “OPEN” is equivalent to “OFF.”

You’ll set the following options with Switch Banks SWA through SWE (the individual port banks):

•Data rates, from 110 to 19,200 bps

•Parity—even, odd, or no parity

•Word sizes —7 or 8 bits

•Flow control by hardware (DTR/CTS) or software (X-ON/X-OFF).

Section 3.4 covers these banks in more detail.

The two banks SWF and SWG (system banks) regulate:

•Responsibility for the Link Command (from master or slave port)

•Automatic timeout period

•Length of pause in Graphics Mode

•Lead Pass-Through

•Arming character

DTE

DCE

PORT 8

DTE

DCE

(BACK)

PORT 7

DTE

DCE

PORT 6 PORT 5

DTE

DCE

INDIVIDUAL PORT SWITCHES

(PORTS 5 THRU 8)

PORT 8		PORT 7		PORT 6		PORT 5
OFF		OFF		OFF		OFF
	SWK		SWJ		SWI		SWH

(FRONT)

Fig. 3-2. Layout of the 4-Port Expansion Board.

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