Honeywell 4022, Системное руководство

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Precision Platform 4022 Scanner Cable End Electrical Assemblies and Precision Measurement Processor
6.3.2. Logic PCB
The Logic PCB plugs in to the Termination PCB. The Logic PCB houses
most of the active components required to operate the scanner and to
monitor certain conditions of the heads and the basis weight shutter.
Figure 6-11 Logic PCB Assembly
Logic PCB main functional blocks:
There are three main functions performed by the PMP Logic PCB.
•
Scanner Motor Control: Converts MSS generic drive signals to
signals that are acceptable by the AC Tech motor controller. Also
provides safety interlocks from the scanner limit switches.
•
Basis Weight Shutter Control: Provides radiation lamp safety
interlock to the shutter solenoid signal.
•
Head Temperature Monitoring and Power Switching: Monitors
both upper and lower head temperatures. Provides signals back to
the Termination PCB to switch 24 VDC and 56 VAC off if the
temperatures exceed 60
°
C (140
°
F).
10/18/07 p/n 6510020208 6-26