Teledyne 9110T - Nitrogen Oxides Analyzer - Manual (Page 52)

Model 9110T NOx Analyzer Getting Started
Teledyne Analytical Instruments 52
RS-232 (COM1): RS-232 (fixed) DB-9 male connector
 Baud rate: 115200 bits per second (baud)
 Data Bits: 8 data bits with 1 stop bit
 Parity: None
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 MULTIDROP (OPTION 62) CONNECTION
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. Refer to Section 14 for more information on
preventing ESD damage.
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 3-15. 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. (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 3-15):
 J3 on the Multidrop/LVDS PCA to the CPU’s COM1 connector