Black Box SWI030A, Руководство пользователя

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15
CHAPTER 3: Installation
NOTES
The total length of cabling between the first Switch module in the
link and the last Switch in the link must not exceed 2,000 feet (609.6 m).
Each Switch has two interchangeable Link Ports. One port should be
connected to the previous Switch in line and the other should be
connected to the next Switch (it doesn’t matter which port is connected
to which Switch).
Run straight-through-pinned twisted-pair or flat-satin cable with
RJ-11 connectors between Link Ports to interconnect the Switches. Do
not use cross-pinned cable for this purpose.
3.4 Making the Control-Port Connection (Pow-R-Switch 1M Only)
The RS-232 Control Port, located on the rear panel of the Pow-R-Switch 1M,
is shown in Figure 3-2 below. It is a DB9 male connector wired in a DTE
configuration, similar to the serial port on an IBM
® AT ® computer. We offer
modular adapter kits that you can put together, attach to the Switch’s Control
Port and to the control device, and run twisted-pair or flat-satin cable between.
Please refer to
Section A.2 in Appendix A for more information.
Figure 3-3. Schematic for the Pow-R-Switch 1M’s Control Port.
1
2
3
4
5
6
7
8
9
DB9
DCD
RXD
TXD
DTR
GND
RTS + 10 VDC
READY
CARRIER
DATA IN
DATA OUT