Table of Contents
Advertisement
9.1.1
Directions, Continued
RD100 Subrack Controller Modules
Remove RD100 subrack controller module/s from subrack/s. Using anti-static
precautions remove U6 IC from the board and replace with the IC labeled "RD100 V4.31"
or higher. Ensure anti-static precautions are taken. Replace RD100 subrack controller
module/s.
RD105 Subrack Controller Modules
Remove RD105 subrack controller module/s from subrack/s. Using anti-static
precautions remove U6 IC from the board and replace with the IC labeled "RD105 V1.04"
or higher. Ensure anti-static precautions are taken. Replace RD105 subrack controller
module/s.
RD200 Text Insertion Modules
All RD200 text insertion modules require the following modifications to be made to LK2
(Link 2) located adjacent to U21. With the side cutters, cut the link between the centre
pin and the "B" pin. Turn the printed circuit board over and with the soldering iron place
a "solder bridge" between the centre pin and the "A" pin. Replace all RD200 modules
back into relevant subrack/s.
9.2
RS-232 BASICS
The MAXPRO-Net equipment uses XON and XOFF signaling protocol and therefore
does not require hardware handshake signals to be wired. Only 3 wires - TX Data, RX
Data and Signal ground are required.
Using your RS-232 test box, even quite high-speed data can be seen clearly as the LED
indicators flash quickly. This will indicate that data is being generated but does not
indicate its speed or other characteristics.
After connecting all equipment, ensure that a light is displayed on a Data Breakout Box
for each direction. This means the TX Data line is connected. If using a multimeter to
determine the transmit pin, its voltage should be between -9V and -15V with reference to
the ground pin.
Transmit Data (TX) pins must always be connected to Receive Data (RX) pins.
RS-232 is not balanced or transformer isolated and is generally not suitable for wiring
between buildings or locations where the ground potentials are different.
While most RS-232 drivers and receivers will tolerate short circuits and accidental
connection to voltages within the normal signal range, they are still subject to
Electrostatic Discharge.
Rev. C
9-2
HMXMU001018
10/06
Advertisement
Table of Contents
