PST Michell Instruments S8000 -100, User Manual, Page: 18 / 68

S8000 -100 User Manual
10 97606 Issue 1, June 2021
INSTALLATION
2.4.5 Analog Output Connections
The two analog outputs can be configured to represent any of the directly measured
or calculated output parameters. They are provided as 2-wire signals from a 6-way
connector located on the rear panel of the instrument
.
Each of these outputs provide a current loop signal (4...20 mA or 0...20 mA). The
0/4...20 mA outputs are active (sourcing) and must be connected to a passive (sinking)
input on the receiving equipment. The configuration of these outputs, i.e. parameter
represented, output type (current loop or voltage) and upper/lower span levels are set
up via the Setup Menu Screen (refer to Section 3.5.5).
These signals may be used to control external systems. During a DCC cycle, and for
the hold period following a
DCC
cycle, they are held at the level that they were at
immediately prior to the start of the cycle. When the dew-point measurement is stable,
or if the maximum hold period has expired, they are released and will track the selected
parameter throughout the measurement cycle.
The default settings of these analog outputs are:
Channel 1
:
Dew point, -100...+20ºC
Channel 2
: ppm
V
, 0...3000
NOTE: The analog outputs are only active during the MEASURE phase. They
will, therefore, be off after switch-on and remain off until the system enters
the MEASURE phase.
The two analog output port connections are made via a single 4-way push fit connector
block. All outputs are 2-wire, positive-going signals referenced to a common 0 V line. To
differentiate between the outputs it is recommended that a black lead be used for each
of the COM (common) lines and a separate color for each of the positive lines.
Figure 6 Alarm and Analog Output Connection