power automation PA 8000 EL, Installation Instructions Manual, Page: 61 / 108

3.8.1 PAMIO boxes and modules
Fig. 37: PAMIO superbus schematic
1 control unit
2 PA superbus connection
3 PAMIO box with two analog axes modules
4 PA superbus connection
5 termination plug
6 max. chain length (14 PAMIO boxes/30 m (98 ft))
A PAMIO box consists of its housing, the PA superbus input and
output connectors as well as two plug-in-slots for I/O modules.
PAMIO boxes can be snapped onto DIN rails and plugged into
each other side by side or connected through optional cables. The
last box carries a termination plug.
Limited cable length
The limits for the I/O system are 31 I/O modules
(internal 2416 EL modules plus a maximum of 14
PAMIO boxes).
The maximum cable length from the control unit to the
last PAMIO box cannot exceed 30 m (98 ft). This has
to be considered as a maximum global length when
several PAMIO boxes are placed at different locations
and connected with interconnection cables.
I/O modules can be mounted where needed, without requiring bus
couplers. Each PAMIO module has its own watchdog timer for the
PA superbus, temperature and voltage monitoring as well as corre-
sponding LED displays on the front side.
Basic Description
PA 8000 EL CNC control unit
Design and function
24.09.2015 | 61