28
Teledyne API T500U CAPS NO
2
Analyzer with NumaView™ Software
083730510A DCN8172
COM2
: RS-232 (configurable to RS 485), DB-9 female connector
•
Baud rate
:19200 bits per second (baud)
•
Data Bits
: 8 data bits with 1 stop bit
•
Parity
: None
RS-232
M
ULTIDROP
(O
PTION
62)
C
ONNECTION
When the RS-232 Multidrop option is installed, connection adjustments and configuration
through the menu system are required. This section provides instructions for the internal
connection adjustments, then for external connections, and ends with instructions for
menu-driven configuration.
Note
Because the RS-232 Multidrop option uses both the RS232 and
COM2 DB9 connectors on the analyzer’s rear panel to connect
the chain of instruments, COM2 port is no longer available for
separate RS-232 or RS-485 operation.
ATTENTION
COULD DAMAGE INSTRUMENT AND VOID WARRANTY
Printed Circuit Assemblies (PCAs) are sensitive to electro-static
discharges too small to be felt by the human nervous system.
Failure to use ESD protection when working with electronic
assemblies will void the instrument warranty. For information on
preventing ESD damage, refer to the manual, Fundamentals of
ESD, PN 04786, which can be downloaded from our website at
Manuals in the Special Manuals section.
In each instrument with the Multidrop option there is a shunt jumpering two pins on the
serial Multidrop and LVDS printed circuit assembly (PCA), as shown in Figure 2-11. This
shunt must be removed from all instruments except that designated as last in the multidrop
chain, which must remain terminated. This requires powering off and opening each
instrument and making the following adjustments:
1. With
NO power
to the instrument, remove its top cover and lay the rear
panel open for access to the Multidrop/LVDS PCA, which is seated on the
CPU.
2. On the Multidrop/LVDS PCA’s JP2 connector, remove the shunt that
jumpers Pins 21
↔
22 as indicated in Figure 2-11. (Do this for all but the
last instrument in the chain where the shunt should remain at Pins 21
↔
22).
3. Check that the following cable connections are made in
all
instruments
(again refer to Figure 2-11):
•
J3 on the Multidrop/LVDS PCA to the CPU’s COM1 connector
(Be aware that the CPU’s COM2 connector is not used in Multidrop)
•
J4 on the Multidrop/LVDS PCA to J12 on the motherboard
•
J1 on the Multidrop/LVDS PCS to the front panel LCD
Summary of Contents for T500U
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