User Manual M3000® Automation System / MSC II (Moog Servo ...

10 MSC II (Moog Servo Controller) Digital I/Os
10.10 Digital I/Os
Each of the 4-digital terminals I/O1…I/O4 of the MSC II can be used as either
an input or an output. Each digital output is internally connected back to a
digital input.
This enables the application program to read the status of the digital outputs
and compare it to the requested value.
Whether a terminal will be used as an input or an output is set in the
PLC Configuration of the MACS development environment.
The following digital output circuits are available:
• Open emitter outputs, switches to +24 V (L2+)
Basic wiring diagrams: � figure-57 on page 95
10.10.1 Display of the Operational State
The status LEDs «I/O1»…«I/O4» on the front panel of the MSC II control
module show the internal operational state of the digital-I/Os. These status
LEDs are activated only when the application program is running.
If a terminal is configured to be an input, the associated LED will illuminate
when it is internally detected that the input is in the 1 state and the input is
used in the application program.
When a terminal is configured to be an output, the associated LED will illuminate
if the output in the application program is in the 1 state.
As MSC II control modules have open emitter outputs, the LED will illuminate
if the terminal is connected through to +24 V (L2+).
Basic wiring diagrams of the digital outputs: � figure-57 on page 95
The status LEDs «I/O1»…«I/O4» will illuminate also if L2+ or M2 are not
connected.
The operational state of the digital I/Os can be queried with the aid of
function blocks in the application program.
10.10.2 Power Supply
DANGER The 24 V power supply terminals of all M3000 ® modules are
protected against reverse polarity.
If the polarity of these power supply terminals is reversed, the
modules will not work.
WARNING M3000 ® modules must be protected from overvoltages
and/or reverse energization from the sensor to the module!
There is a danger of:
• Permanent damage by overheating or fire
• Malfunctions
M3000 ® modules must have the correct voltage, polarity, and
terminal assignments.
Digital I/Os I/O1…I/O4
of the MSC II control
module
Status LEDs
«I/O1»…«I/O4»
Power Supply of the
Digital I/Os of the MSC II
control module:
Safety Instructions
© Moog GmbH User Manual M3000 ® and MSC II (CA65865-001; Version 1.1, 08/08) 93