Kollmorgen BDS5, Installation And Setup Manual

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BDS5 C
HAPTER
2 - I
NSTALLATION
2-13
For RS-485, you should install
jumpers across Pins 3-4 and
7-8 on J1 on the front of the
BDS5 at the end of the
communication cable. If the
device you are using to
communicate with the BDS5
is at one end of the line, you
should terminate the line at
that end with a 120 ohm
resistor.
•
DISTANCE
RS-232 generally works well up to 50 feet using
standard cable. Special low capacitance cable can
extend this range up to 500 feet, although the baud rate
may need to be reduced. These cables are available
from many companies, including Black Box
(Pittsburgh, PA).
RS-485 can be used up to 4000 feet. Be forewarned,
however, that using very long cables may be more
difficult than just making the connections. Special
attention must be paid to AC loading, transmission line
effects, noise pickup, and common-mode voltages. It
would be wise to have a person who is knowledgeable
in these matters to review the cable design beforehand.
Again, baud rates may need to be reduced as the
length increases, and low capacitance cables may be
required.
You can obtain a copy of the specification for RS-232
or RS-485 by contacting:
Electronic Industries Association
Engineering Department
2001 Eye Street, N.W.
Washington, D.C. 20006
•
CONNECTING TO A TERMINAL
Connect the pins on the DE-9S connector that came
with your BDS5 as follows:
Table 2.4. Terminal Wiring
WIRING TO MOST RS-232 TERMINALS
BDS5
(DE-9)
Female Terminal
(DB-25)
Male or Female
1 SHIELD* 1
2 RxD
←
TxD 2
3 TxD
→
RxD 3
5 COM 7
* Usually, you will only connect the shield at one
end. Sometimes, the shield should be connected
at both ends. This is system dependent and
generally found by trial and error.
The table above assumes that your terminal has an
RS-232 serial port which is configured as Data
Terminal Equipment (DTE), the usual configuration.
If your terminal is configured as Data
Communications Equipment (DCE), then interchange
Pins 2 and 3 at one end of the cable.
Note that handshaking signals (CTS, DTR, etc.) are
not supported.
NOTE