7. Electrical installation
Festo P.BE-CMMP-AS-3A-HW-EN 0708NH 71
Two potential areas are defined in the CMMP-AS servo positioning controller:
Analogue inputs
and outputs:
All analogue inputs and outputs are referenced to AGND. AGND is
internally connected to GND , the reference potential for the control
unit with C and AD converters in the servo positioning controller.
This potential area is electrically isolated from the 24V area and the
intermediate circuit.
These signals are relative to the CMMP-AS servo positioning con-
troller 24V supply voltage via [X9] and are isolated by optocouplers
from the control unit reference potential.
The CMMP-AS servo positioning controller has one differential (AIN0) and two single-ended
analogue inputs, designed for input voltages 10 V. The AIN0 and #AIN0 are connected to
the control system using twisted-pair cables. If the control system has single-ended out-
puts then the output is connected to AIN0 and #AIN0 is connected to the control system
reference potential. If the control system has differential outputs then these are to be con-
nected 1:1 to the differential inputs of the CMMP-AS servo positioning controller.
The AGND reference potential is connected to the control system reference potential. This
is necessary to ensure the differential input of the CMMP-AS servo positioning controller
cannot be overloaded by "common-mode interference".
There are two analogue monitor outputs with output voltages 10 V and a reference volt-
age output of +10 V. These outputs can be connected to the higher-level control system
and the AGND reference potential must also be connected. If the control system has differ-
ential inputs then the "+" input of the control system must be connected to the CMMP-AS
servo positioning controller output and the "-" input of the control system must be con-
nected to AGND.
If the AIN1 and AIN2 analogue inputs are to be used as DIN12 and
DIN13 then a mass reference from AGND to GND24 must be estab-
lished. This connection removes the DIN optical isolation between
GND24 and the internal GND.
This makes the electronics overvoltage protection inoperative.
7.5.1 Layout on device [X1]
- D-SUB connector, 25-pin, female
7.5.2 Counterplug [X1]
- D-SUB connector, 25-pin, male
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