Features of the PS 4-300
9
04/99 AWB 2700-1311 GB
햵 Plug-in screw terminals
An overview of the digital and analog I/O connections
is given in the “Engineering” chapter.
햶 Status LEDs for digital inputs
The physical and logical states of the PLC’s signal
inputs and diagnostic status word are indicated by
light-emitting diodes (LEDs) (See "Diagnostic status
word" on page 76).
햷
Alarm inputs (interrupt input)
Inputs I1.0 and I1.1 enable you to respond quickly to
events regardless of the cycle time. In the Sucosoft
S40 programming software, the alarm inputs are
supported by the “EdgeAlarm”
1
, function block. The
rising or falling edge can also be used to evaluate
such events
햹
Digital outputs
The PS 4-300 has 14 digital outputs 24 V DC. They
can withstand a load of 0.5 A and have a 100 % duty
factor. They are electrically isolated from the CPU
and are short-circuit and overload-proof. Up to four
outputs may be connected in parallel, ideally in
groups (Q0.0 to Q0.3, Q0.4 to Q0.5, Q1.0 to Q1.3 and
Q1.4 to Q1.7).
The outputs can be addressed in bit, byte or word
format with I/O commands. Check the composition
of the groups if the outputs are connected in parallel.
1) These function blocks are described in chapter 6 of the
manual “Language Elements for the PS 4-150/-200/-300
and PS 416” (AWB 2700-1306 GB).
H1311g.bk Seite 9 Freitag, 4. Juni 1999 1:12 13
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