Festo Checkbox Identbox, Manual

Page: 53 / 158

3. The I/O module on the Checkbox
3-5
Festo P.BE-Checkbox-EN en 0103c
3.2 Internal power supply of the I/O module
The I/O module of the Checkbox is connected via pin I/15
(24 V DC) and pin I/34 (GND) to the built-in power unit or
external power source. Use the Sub-D plug “Controller” pro-
vided for connecting the power supply.
Important note
In the case of internal supply of the I/O module, devices
connected to the Checkbox have direct electrical coupling
with the power supply for the Checkbox processor.
The circuit type “Internal supply” is therefore only per-
mitted for connecting buffer zone sensors. The circuit type
“External supply” is stipulated for other applications.
Internal supply The plug “Controller” is wired at the factory for internal power
supply for operation with buffer zone sensors. The I/O mod-
ule is operated thus via the power unit for the Checkbox.
Connector socket “Controller” on the Checkbox
Internal power supply
O/16 Internal GND
O/35 In 24 V DC
I/15 External GND
I/34 Ex 24 V DC
GND
+ 24 V DC