Teledyne API Model 465L O3 Monitor Operation Manual
05509G DCN6806
Teledyne API Model 465L O
3
Monitor Manual
27
4.4.
Electrical I/O Connections
4.4.1.
Location of I/O Connectors in the NEMA Configuration
In the NEMA configuration of the 465L, the I/O connectors are located internally in
the instrument. See Figure 4-7 for their location. The relative position of the
connectors and the pinout information is the same as the Rack-Mount configuration
shown in Figure 4-6. Connection to these terminals is usually made via a conduit
connection to the NEMA enclosure. A standard conduit penetration may be added
to one of the walls of the enclosure for this purpose, or the existing penetration may
be used.
4.4.2.
Analog Output
The analog output is located at the “General I/O” connector (See Figure 4-6) and is
labeled “ANA.” The analog output can be configured for 0-5V voltage or 4-20 mA
current output. See Section 9.8 for details on verifying or changing the analog
output hardware configuration.
The analog output is automatically scaled to the range of the instrument, i.e. if the
monitor range is 1000 PPB, then 5V would correspond to 1000 PPB and 0V would
correspond to 0 PPB. See Section 7.2.7 for information on changing the range of
the monitor.
The 465L has an analog output step-test mode that can be used for verifying the
operation of the analog output and calibration of external measurement equipment.
This mode is described in Section 7.2.3.1.
4.4.3.
Status Outputs
There are four instrument status outputs located at the “General I/O” connector.
These status outputs mirror the state of the four diagnostic LEDs on the front panel.
Electrically these outputs are SPST dry contact relay closures with a common
contact, labeled ‘C’ on the rear panel. They are capable of switching up to 50 VDC,
250mA maximum current. There are no polarity requirements, so the outputs can be
used to sink or source current from the ‘C’ pin, within the maximum voltage and
current specified. Schematically, the outputs look as shown in Figure 4-8 below:
Summary of Contents for 465L
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