Teledyne T100 Instruction Manual page 53

Teledyne ML - T100 UV Fluorescence SO2 Analyzer
3.4.8.4. RS-232 MULTIDROP (OPTION 62) CONNECTION
ATTENTION
When the RS-232 Multidrop option is installed, the instrument designated as last in the
chain must be terminated. This requires installing a shunt between two pins on the
multidrop printed circuit assembly (PCA) inside the instrument. Step-by-step
instructions for installation follow.
Note that 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.
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 11 for more
information on preventing ESD damage.
To install shunt in the last analyzer:
1. With NO power to the instrument, remove its top cover and lay the rear panel open
for access to the multidrop PCA, which is seated on the CPU.
2. On the multidrop PCA's JP2 connector, use the shunt provided to jumper Pins
21  22 as indicated in (Figure 3-14).
Getting Started
53