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System Description PX 30 and PX 120
PX 30 and PX 120 Operating Manual
Dimmer Function
A sensor judges the brightness at the front of the unit and adapts the brightness of the
display accordingly.
This dimmer function is activated by setting a jumper (1) on the rear of the unit (below the
Flash-EPROM).
The jumper is not inserted ex-works, so the dimmer is switched off. In this case the
display will operate at a constant maximum brightness.
When the dimmer is activated (jumper inserted), optimum standard brightness is achieved
as follows:
Adjust the dimmer setting (2) with a screwdriver until maximum brightness is achieved
under typical light conditions.
Start from the right stopper and turn anti-clockwise until the display begins to darken.
Then carefully turn it clockwise again until it lightens.
Hardware
Both units have:
• Fluorescent Display; 2 lines
• 24 V inputs (16 inputs on the PX 30, 24 inputs on the PX 120)
• One 24 V output (handshake output "HS")
• Serial Interface (V24, 9-pin)
• Automatic brightness control (dimmer function)
• 32 KByte Flash-EPROM cartridge; 64 KByte available as an option
• Ability to program the Flash-EPROM inside the unit.
MEMORY
DISPLAY
RS 232
(2)
(1)
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