Watlow Electric Revision 5 - Manual (Page 7)

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1.1.3 PROCESS INTEGRITY: The ANAFAZE approach delivers high
integrity because the SYSTEM 32 independently controls and checks each
loop for alarms while it is in turn checked by the computer. Thus a
computer failure will not affect the process and a controller problem will be
detected by the computer. Further integrity is built in to the SYSTEM 32
since it has EEROM memory to protect control and alarm parameters. A
watchdog timer with digital output adds to process integrity.
1.1.4 MULTIPLE TYPES OF INPUTS AND CONTROL OUTPUTS:
Since there is a large variety of processes and sensor types the system 32 has
been designed to accept nearly any input and provide nearly any control
output. Measurements from thermocouples, RTD's, infrared sensors,
millivolt, milliamp, and other signals are directly connected the SYSTEM
32. Thermocouple reference junction compensation and linearization is
done by the SYSTEM 32. With plug in input modules, 16 to 96 inputs can
be accommodated in a single SYSTEM 32.
For control, each SYSTEM 32 includes, as standard, 32 digital outputs for
time proportioning or on/off control. Additionally, 8 standard on/off
outputs can be used for global alarm shutdowns or process warnings.
Optional plug- in analog output modules provide open or closed loop
control. Each module contains 16 outputs which includes both 4 to 20ma
and 0 to 5Vdc outputs which can be selected individually for each output.
1.1.5 STANDARD [ALLEN BRADLEY] COMMUNICATION
PROTOCOL: The SYSTEM 32 utilizes a form of ANSI 3.28-1976
standard protocol for communication. Jumper selection of CRC or BCC,
and baud rate allow the system to matched to any host computer or other
device. This ANSI standard is also used by Allen Bradley enabling the
SYSTEM 32 to be connected directly to these programmable controllers.
1.1.6 COMPACT EASILY MAINTAINED PACKAGING: Front plug
in modules with removable screw terminal blocks provide high reliability
and convenient maintainability. A 3 and 6 slot housing is available and the
modules require a 5Vdc power supply which can be mounted internally or
externally.
1.2 PLUG IN SYSTEM 32 MODULES
The flexible ANAFAZE SYSTEM 32 design allows cost effective matching of
measurement and control capabilities to the process needs. By selecting a
combination of plug in modules the system will perform full PID control
processing, communications to a host computer, industrial sensor measurement,
and deliver precise control outputs.