User manual

AP 230 USER MANUAL 47
Cable for 9 pin connector
B.2 - DESCRIPTION OF OPTOCOUPLED INTERFACE AND PINOUT OF
THE 9 PIN MALE CONNECTOR.
The printer is equipped with an additional connector (9 - pin, male, "D" type) located
on the rear panel of the printer, which carries some optocoupled Input/Output
signals useful to interface the machine to external devices (typically industrial
PLCs, object sensing photocell or relays).
Output signals are directly connected to collector and emitter of BD679 transistors
(darlington) which may safely carry a current up to 200 mA and stand a voltage up
to 30 VDC, while the input signal current is limited by a 2.2 KOhm series resistor,
which allows input voltages in the range of 10 to 30 VDC, resulting in direct
compatibility with standard 24V industrial PLCs.
The READY signal indicates the normal working condition (printer ON-LINE) when
the transistor is ON and, viceversa, it indicates that the machine, for any reason, is
not operating (printer OFF-LINE) when the transistor is OFF. See the section
describing printer error codes (Return Messages/Printer Status) for detailed
information about the possible error situations in which the machine may go
OFF-LINE.
The START input signal may be used to trigger the printing phase or the application
phase, according to current printer configuration, which also determines the active
polarity (see the description of the /K command for further details). This signal is
physically in parallel with the one coming from the optional label dispensing
photosensor.