Calibration Serinus 51 User manual 1.0
46
5.4 Digital/Analog communication
External I/O port
The 25 Pin Analog/Digital port on the rear of the analyzer sends and receives
analog/digital signals to other devices. These signals are commonly used to
activate gas calibrators or for warning alarms.
Analog Outputs
The analyzer is equipped with three analog outputs Voltage 0-5V or
Current settable 0-20,2-20,4-20 mA
Analog Inputs
The Analyzer is also equipped with three analog inputs with resolution
of 15 bits plus polarity. Input voltage 0-5 V
Digital Status Inputs
The analyzer is equipped with 8 logic level inputs for the external
control of the Analyzer such as Zero/Span sequences. Each input has a
terminating resistor which can be either PULL UP or PULL DOWN.
This is set using the Jumper JP1 on the Back Panel printed circuit board.
Digital Status Outputs
The analyzer is equipped with 8 open collector outputs which will
convey instrument status conditions warning alarms such as no flow,
sample mode, etc. Two of the digital outputs can be set so that there is
+5V or +12V available on the 25 pin connector for control purposes.
In the default jumper locations (Figure 15) these two outputs will
function normally as open collector outputs. If moved to the position
closer to the 25 pin connector then DO 0 will supply +12V and DO 1
will supply +5V. These supplies are limited to about 100mA.
Figure 15 Serinus 25 pin microprocessor board (with default jumpers highlighted)
To Next Page
Loading...
