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Series 330 Vacuum Gauge Controller
Instruction Manual - 330004 - Rev. 02
Chapter 7
7
Process Control Module
Safety Notices
Improper wiring, programming or operation of the process control module can result in equipment damage
or personnel injury. To avoid these possibilities:
• Program the setpoints for fail-safe operation. Use setpoint pressure, gauge assignment and polarity
settings to provide safe operation in the event of equipment or power failure.
• Label the setpoints on the front panel of the 330 Controller to avoid confusion and allow safe
manual operation.
• Verify system operation by manually stepping through the control sequence before switching to
automatic control. Be sure that a malfunction in the sequence cannot produce a hazard.
• Install safety devices in the system to limit hazardous conditions. For example, a pressure relief
device should be installed on any system using a high pressure gas source.
• Restrict manual operation of the process controls to only knowledgeable persons.
7.1 Introduction
The Process Control Module provides the 330 Vacuum Gauge Controller with single-pole,
double-throw relays that can be controlled either by digital setpoints or by the built-in manual
override switches. The Process Control Module for the 330 VGC has 2 channels for the Ionization
gauge only.
7.2 Process Control System Connections
Prior to connecting the process controls to the system, it is recommended that the following steps
be followed. If application assistance is desired, contact a Brooks Automation, Inc. /
Granville-Phillips Customer Service Representative. Contact information is provided on the front
and back covers, and in the Service and Maintenance chapter.
1.
Develop a logic diagram of the process control function.
2.
Prepare a specification table which lists the proposed pressure setting, system measurement
point, and polarity for each PC channel.
3.
Draw a circuit schematic which specifies exactly how each piece of system hardware will be
connected to the 330 process control relays.
It is the installer's responsibility to ensure that the automatic signals provided by the
product are always used in a safe manner. Carefully check the system programming
before switching to automatic operation.
Where an equipment malfunction could cause a hazardous situation, always provide
for fail−safe operation. As an example, in an automatic backfill operation where a
malfunction might cause high internal pressures, provide an appropriate pressure
relief device.
Summary of Contents for Series 330
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