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MANUAL P/N 316005 REV: B
Chapter 9 - Linear Analog Output Module
9.1 Introduction
The Linear Analog Output Module provides three, zero to +10 Vdc, linearized voltages that correspond to the
displayed pressure readings of the 316 Vacuum Gauge Controller. The source for these outputs is the digital
data on the controller's internal bus to the Display Module. The analog output resolution is therefore
dependent upon this data. The module is intended to be used in a 316 VGC configured with three gauges.
The output is scaled for the thermocouple range of pressure.
9.2 Installation
The Module is installed in the controller in the slot normally assigned to the computer interface module.
9.2.1 Cable Connections
The output is via a "D" type 9-pin connector for which the mating parts have been supplied. The pin
assignment, for the output connector, is defined in the following table:
Pin Assignments
Pin(s)
Function
1,2,4,6 & 8
Ground (both signal and chassis)
3
Not used
5
TC/CG "B" output
7
TC/CG "A" output
9
TC/CG/CM "C" output
9.3 Operation
The Linear Analog Output Module is in operation anytime power is "on". There are no accessible controls or
adjustments.
Note
: During periods where the front panel display is showing the process control setpoint, the analog
outputs will lock up at the last valid pressure reading.
9.4 Calibration
Internal zero and full scale adjustment potentiometers are available for the three analog output channels.
Adjustment should be rarely, if ever, required.
